CN107219613B - Optical imaging lens - Google Patents

Abstract

The present application discloses an optical imaging lens. The optical imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from the object side to the image side along an optical axis. lens. The first lens has positive refractive power; the second lens, the third lens and the sixth lens all have negative refractive power; at least one of the fourth lens and the fifth lens has positive refractive power; The image sides of the four lenses are convex; the image sides of the second lens and the sixth lens are concave; and the total effective focal length f of the optical imaging lens and the curvature radius R9 of the object side of the fifth lens satisfy f/|R9 |≤0.35.

Description

Optical Imaging Lens

technical field

The present application relates to an optical imaging lens, and more specifically, the present application relates to an optical imaging lens including six lenses.

Background technique

In recent years, with the development of science and technology, portable electronic products have gradually emerged, and portable electronic products with camera functions have been more favored by people. Therefore, the market demand for camera lenses suitable for portable electronic products has gradually increased. As portable electronic products tend to be miniaturized, the total length of the lens is limited, which increases the difficulty of lens design.

At the same time, with the improvement of the performance and the reduction of the size of common photosensitive elements such as photosensitive coupling device (CCD) or complementary metal oxide semiconductor element (CMOS), the number of pixels of the photosensitive element increases and the size of the pixel decreases, thereby Higher requirements are put forward for the high imaging quality and miniaturization of the matching optical imaging lens.

The aperture number Fno (the total effective focal length of the lens/the entrance pupil diameter of the lens) of the existing lens is usually configured at 2.0 or above. Although this type of lens can meet the requirements of miniaturization, it cannot be used in insufficient light (such as rainy days, Dusk, etc.), hand shake and other conditions to ensure the imaging quality of the lens, so the lens with an aperture number Fno of 2.0 or above can no longer meet the higher-level imaging requirements.

SUMMARY OF THE INVENTION

The present application provides an optical imaging lens that is applicable to portable electronic products and can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art.

One aspect of the present application provides such an optical imaging lens, the lens includes in sequence from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a first lens Six lenses. The first lens can have a positive refractive power; the second lens, the third lens, and the sixth lens can all have a negative refractive power; at least one of the fourth lens and the fifth lens can have a positive refractive power; the object of the first lens The image side of the side and the fourth lens can be convex; the image of the second lens and the sixth lens can be concave; and the total effective focal length f of the optical imaging lens and the radius of curvature R9 of the fifth lens object side It can satisfy f/|R9|≤0.35.

In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy f/EPD≤1.8.

In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy -1<f1/f2<0.

In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f1 of the first lens may satisfy 1<f/f1<1.5.

In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy 2.0<CT1/CT2<3.5.

In one embodiment, the total effective focal length f of the optical imaging lens and the curvature radius R12 of the image side of the sixth lens may satisfy 2.5<f/R12<4.0.

In one embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R1 of the object side surface of the first lens may satisfy 2≦f/R1<2.5.

In one embodiment, the fourth lens may have positive refractive power, and its effective focal length f4 and the total effective focal length f of the optical imaging lens may satisfy 0.7<f4/f<1.2.

In one embodiment, the dispersion coefficient V1 of the first lens and the dispersion coefficient V2 of the second lens may satisfy 2.0<V1/V2<4.0.

In one embodiment, the angle of incidence β62 of the upper ray with the largest field of view on the image side of the sixth lens may satisfy 7°<β62<12°.

In one embodiment, the distance TTL from the center of the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens can satisfy TTL/ImgH≤ 1.7.

Another aspect of the present application provides such an optical imaging lens. The optical imaging lens includes sequentially from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens can have positive power, and its object side can be convex; the second lens can have negative power, and its image side can be concave; the third lens has positive or negative power; the fourth lens can With positive power, its image side can be convex; the fifth lens has positive or negative power, its object side can be concave, and its image side can be convex; the sixth lens can have negative power, its image The side surface can be concave; and the total effective focal length f of the optical imaging lens and the curvature radius R10 of the image side surface of the fifth lens can satisfy f/|R10|≤0.5.

In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f1 of the first lens may satisfy 1<f/f1<1.5.

In one embodiment, the effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens may satisfy 0.7<f4/f<1.2.

In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy -1<f1/f2<0.

In one embodiment, the dispersion coefficient V1 of the first lens and the dispersion coefficient V2 of the second lens may satisfy 2.0<V1/V2<4.0.

In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy 2.0<CT1/CT2<3.5.

In one embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R1 of the object side surface of the first lens may satisfy 2≦f/R1<2.5.

In one embodiment, the total effective focal length f of the optical imaging lens and the curvature radius R12 of the image side of the sixth lens may satisfy 2.5<f/R12<4.0.

In one embodiment, the angle of incidence β62 of the upper ray with the largest field of view on the image side of the sixth lens may satisfy 7°<β62<12°.

In one embodiment, the distance TTL from the center of the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens can satisfy TTL/ImgH≤ 1.7.

In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy f/EPD≤1.8.

Another aspect of the present application also provides such an optical imaging lens. The optical imaging lens includes sequentially from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens can have positive power, and its object side can be convex; the second lens can have negative power, and its image side can be concave; the third lens has positive or negative power; the fourth lens has Positive or negative power, the image side can be convex; fifth lens can be positive or negative; sixth lens can be negative power, the image side can be concave; and the largest field of view The incident angle β62 of the upper ray on the image side of the sixth lens can satisfy 7°<β62<12°.

This application uses, for example, six lenses. By rationally allocating the focal power, surface shape, center thickness of each lens, and the axial distance between each lens, etc., the system has a large Aperture advantage, thereby enhancing the imaging effect in dark environments while improving peripheral light aberrations. At the same time, the optical imaging lens with the above configuration can have at least one beneficial effect such as miniaturization, large aperture, high imaging quality, and low sensitivity.

Description of drawings

Other features, objects and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the attached image:

FIG. 1 shows a schematic structural view of an optical imaging lens according to Embodiment 1 of the present application;

2A to 2D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of embodiment 1;

FIG. 3 shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application;

4A to 4D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of embodiment 2;

FIG. 5 shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application;

6A to 6D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of embodiment 3;

FIG. 7 shows a schematic structural view of an optical imaging lens according to Embodiment 4 of the present application;

8A to 8D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of embodiment 4;

FIG. 9 shows a schematic structural view of an optical imaging lens according to Embodiment 5 of the present application;

10A to 10D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of embodiment 5;

FIG. 11 shows a schematic structural view of an optical imaging lens according to Embodiment 6 of the present application;

12A to 12D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of embodiment 6;

FIG. 13 shows a schematic structural view of an optical imaging lens according to Embodiment 7 of the present application;

14A to 14D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of embodiment 7;

FIG. 15 shows a schematic structural view of an optical imaging lens according to Embodiment 8 of the present application;

16A to 16D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of embodiment 8;

FIG. 17 shows a schematic structural view of an optical imaging lens according to Embodiment 9 of the present application;

18A to 18D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of embodiment 9;

FIG. 19 schematically shows the incident angle β62 of the top ray with the largest field of view on the image side of the sixth lens.

Detailed ways

For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are descriptions of exemplary embodiments of the application only, and are not intended to limit the scope of the application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, expressions of first, second, third, etc. are only used to distinguish one feature from another, and do not represent any limitation on the features. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.

In the drawings, the thickness, size and shape of lenses have been slightly exaggerated for convenience of illustration. In particular, the shapes of spherical or aspheric surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspheric surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The drawings are examples only and are not strictly drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is at least in the paraxial region concave. The surface of each lens closest to the object is called the object side, and the surface of each lens closest to the imaging plane is called the image side.

It should also be understood that the terms "comprising", "comprising", "having", "comprising" and/or "comprising", when used in this specification, mean that the stated features, elements and/or components are present. , but does not exclude the existence or addition of one or more other features, elements, components and/or combinations thereof. Furthermore, expressions such as "at least one of," when preceding a list of listed features, modify the entire listed feature and do not modify the individual elements of the list. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". Also, the word "exemplary" is intended to mean an example or illustration.

Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted to have a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless It is expressly so defined herein.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

The features, principles and other aspects of the present application are described in detail below.

The optical imaging lens according to the exemplary embodiment of the present application includes, for example, six lenses having powers, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The optical imaging lens may further include a photosensitive element disposed on the imaging surface.

The first lens can have positive power, and its object side can be convex; the second lens can have negative power, and its image side can be concave; the third lens has positive or negative power; the fourth lens has positive or negative power, the image side is convex; the fifth lens has positive or negative power; and the sixth lens has negative power, the image side is concave.

In one embodiment, the third lens may have negative optical power. The third lens has negative optical power to help reduce system sensitivity.

In one embodiment, the object side of the fifth lens may be concave, and the image side may be convex. The fifth lens is arranged in a meniscus shape convex to the image side, which helps to reduce the astigmatism of the system and matches the chief ray angle CRA of the chip.

The total effective focal length f of the optical imaging lens and the effective focal length f1 of the first lens may satisfy 1<f/f1<1.5, more specifically, f and f1 may further satisfy 1.05≤f/f1≤1.34. Reasonably allocating the focal power of the first lens can make the imaging lens have a better ability to balance field curvature.

The effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens may satisfy 0.7<f4/f<1.2, more specifically, f4 and f may further satisfy 0.84≤f4/f≤1.04. Reasonably allocating the focal power of the fourth lens can make the imaging lens have a better ability to balance astigmatism.

The effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy -1<f1/f2<0, more specifically, f1 and f2 may further satisfy -0.57≤f1/f2≤-0.32. By rationally distributing the focal powers of the first lens and the second lens, the light deflection angle can be reduced and the sensitivity of the system can be reduced.

Between the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis can satisfy 2.0<CT1/CT2<3.5, more specifically, CT1 and CT2 can further satisfy 2.27≤CT1/CT2 ≤3.41. By rationally arranging the central thicknesses of the first lens and the second lens, the lens can have a better ability to balance aberrations.

The total effective focal length f of the optical imaging lens and the curvature radius R1 of the object side of the first lens can satisfy 2≤f/R1<2.5, more specifically, f and R1 can further satisfy 2.03≤f/R1≤2.34. Reasonably arranging the curvature radius of the object side of the first lens can effectively balance the system aberration and improve the imaging quality of the lens.

The total effective focal length f of the optical imaging lens and the curvature radius R9 of the fifth lens object side can satisfy f/|R9|≤0.35, more specifically, f and R9 can further satisfy 0≤f/|R9|≤0.27. The total effective focal length f of the optical imaging lens and the curvature radius R10 of the image side of the fifth lens can satisfy f/|R10|≤0.5, more specifically, f and R10 can further satisfy 0.08≤f/|R10|≤0.42.

The total effective focal length f of the optical imaging lens and the curvature radius R12 of the sixth lens image side can satisfy 2.5<f/R12<4.0, more specifically, f and R12 can further satisfy 2.93≤f/R12≤3.79. Reasonably arrange the radius of curvature of the sixth lens so that the lens can better match with commonly used chips.

The incident angle β62 (shown in FIG. 19 ) of the top ray of the maximum field of view on the image side of the sixth lens can satisfy 7°<β62<12°. More specifically, β62 can further satisfy 8.3°≤β62≤11°. By controlling β62 within a reasonable range, the ghost state of the system can be effectively weakened to an acceptable range.

The dispersion coefficient V1 of the first lens and the dispersion coefficient V2 of the second lens may satisfy 2.0<V1/V2<4.0, more specifically, V1 and V2 may further satisfy 2.23≦V1/V2≦3.14. Reasonable selection of materials for the first lens and the second lens can make the imaging lens have a better ability to balance chromatic aberration.

The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens can satisfy f/EPD≤1.8, more specifically, f and EPD can further satisfy 1.68≤f/EPD≤1.78. The smaller the aperture number Fno of the optical imaging lens (that is, the total effective focal length f of the lens/the entrance pupil diameter EPD of the lens), the smaller the clear aperture of the lens is, and the more light can enter in the same unit time. The reduction of the aperture number Fno can effectively increase the brightness of the image surface, so that the lens can better meet the shooting needs when the light is insufficient. Configuring the lens to meet the conditional f/EPD≤1.8 can give the lens a large aperture advantage in the process of increasing the light flux, thereby improving the imaging effect in dark environments while improving peripheral light aberrations.

The total optical length TTL of the optical imaging lens (that is, the axial distance from the center of the object side of the first lens to the imaging surface of the optical imaging lens) and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens can be TTL/ImgH≦1.7 is satisfied, more specifically, TTL and ImgH may further satisfy 1.56≦TTL/ImgH≦1.64. By controlling the total optical length of the lens and the ratio of the image height, the total size of the imaging lens can be effectively compressed to achieve the ultra-thin characteristics and miniaturization of the imaging lens, so that the imaging lens can be better used in portable electronic devices such as Systems with limited size such as products.

In an exemplary embodiment, the optical imaging lens may further be provided with at least one aperture to improve the imaging quality of the lens. It should be understood by those skilled in the art that the diaphragm can be arranged at any position between the object side and the image side as required, that is, the diaphragm setting should not be limited to the positions described in the following embodiments.

Optionally, the above-mentioned optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element on the imaging surface.

The optical imaging lens according to the above-mentioned embodiments of the present application may use multiple lenses, such as the six lenses mentioned above. By rationally allocating the focal power, surface shape, center thickness of each lens, and the axial distance between each lens, etc., the sensitivity of the lens can be effectively reduced and the processability of the lens can be improved, making the optical imaging lens more efficient. It is beneficial to production and processing and can be applied to portable electronic products. At the same time, the optical imaging lens with the above configuration also has beneficial effects such as ultra-thin and large aperture, high imaging quality and the like.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspheric mirror surface. The characteristic of the aspheric lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike spherical lenses, which have a constant curvature from the center of the lens to the periphery of the lens, aspherical lenses have better curvature radius characteristics, which have the advantages of improving distortion and astigmatism. After adopting the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. In addition, the use of aspherical lenses can effectively reduce the number of lenses in the optical system.

However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain various results and advantages described in this specification. For example, although six lenses have been described as an example in the embodiments, the optical imaging lens is not limited to include six lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

Specific examples of the optical imaging lens applicable to the above embodiments will be further described below with reference to the accompanying drawings.

Example 1

The optical imaging lens according to Embodiment 1 of the present application will be described below with reference to FIGS. 1 to 2D . FIG. 1 shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application.

As shown in Figure 1, the optical imaging lens includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens along the optical axis from the object side to the imaging side. E6 and imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave, and both the object side S1 and the image side S2 of the first lens E1 are aspherical.

The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave, and both the object side S3 and the image side S4 of the second lens E2 are aspherical.

The third lens E3 has negative refractive power, its object side S5 is concave, and its image side S6 is convex, and both the object side S5 and the image side S6 of the third lens E3 are aspherical.

The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex, and both the object side S7 and the image side S8 of the fourth lens E4 are aspherical.

The fifth lens E5 has positive refractive power, its object side S9 is concave, and its image side S10 is convex, and both the object side S9 and the image side S10 of the fifth lens E5 are aspherical.

The sixth lens E6 has a negative refractive power, its object side S11 is convex, and its image side S12 is concave, and both the object side S11 and the image side S12 of the sixth lens E6 are aspherical.

Optionally, the optical imaging lens may further include a filter E7 having an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging plane S15.

Optionally, a diaphragm STO for limiting light beams may be provided between the object side and the first lens E1 to improve the imaging quality of the optical imaging lens.

Table 1 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 1, wherein the units of radius of curvature and thickness are millimeters (mm).

Table 1

It can be obtained from Table 1 that the center thickness CT1 of the first lens E1 on the optical axis and the center thickness CT2 of the second lens E2 on the optical axis satisfy CT1/CT2=3.09; The dispersion coefficient V2 of the two lenses E2 satisfies V1/V2=3.14.

This embodiment adopts five lenses as an example, by rationally distributing the focal length of each lens, the surface shape of each lens, the center thickness of each lens, and the distance between each lens, while realizing the miniaturization of the lens, the size of the lens can be increased. Increase the amount of light and improve the imaging quality of the lens. Each lens can be an aspheric lens, and the surface type x of each aspheric surface is limited by the following formula:

Among them, x is the distance vector height of the aspheric surface from the apex of the aspheric surface at the position of height h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1/R (that is, the paraxial curvature c is the above table The reciprocal of the radius of curvature R in 1); k is the cone coefficient (given in Table 1); Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below shows the higher-order coefficients A ₄ , A ₆ , A ₈ , A ₁₀ , A ₁₂ , A ₁₄ and A ₁₆ that can be used for each aspheric mirror surface S1-S8 in Example 1.

face number A4 A6 A8 A10 A12 A14 A16 S1 6.1503E-02 9.8254E-03 -4.8419E-02 7.5778E-02 -7.0247E-02 3.2873E-02 -7.0505E-03 S2 -1.0788E-01 1.0714E-01 8.5427E-02 -3.8756E-01 4.6600E-01 -2.6404E-01 5.8382E-02 S3 -1.6197E-01 2.6212E-01 7.1959E-02 -5.6650E-01 7.3097E-01 -4.1333E-01 8.8677E-02 S4 3.6309E-02 3.0429E-02 4.5209E-01 -1.2915E+00 1.9176E+00 -1.4841E+00 5.2145E-01 S5 -1.0598E-01 -1.3125E-01 6.0651E-01 -1.7206E+00 2.7621E+00 -2.3642E+00 8.6203E-01 S6 -7.7441E-02 -6.4387E-02 8.2649E-02 -1.3492E-01 1.5097E-01 -8.6394E-02 2.1849E-02 S7 4.5638E-02 -1.2372E-02 -2.2848E-02 -2.8653E-02 4.3012E-02 -2.1252E-02 3.8546E-03 S8 -7.0280E-02 1.6027E-01 -2.0263E-01 1.4419E-01 -5.6981E-02 1.1302E-02 -8.6592E-04 S9 1.2026E-01 -2.4979E-01 1.0022E-01 1.1263E-02 -1.8397E-02 4.9245E-03 -4.4309E-04 S10 2.2513E-01 -4.1935E-01 2.8406E-01 -1.0671E-01 2.3803E-02 -2.9260E-03 1.5148E-04 S11 -2.0941E-01 1.7045E-02 6.1951E-02 -3.3171E-02 7.6601E-03 -8.6246E-04 3.8700E-05 S12 -1.9957E-01 1.3111E-01 -5.1840E-02 1.2403E-02 -1.7954E-03 1.4443E-04 -4.9116E-06

Table 2

The following table 3 provides the effective focal length f1 to f6 of each lens in embodiment 1, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens (that is, from the center of the object side S1 of the first lens E1 to The distance of the imaging plane S15 on the optical axis) and the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens.

table 3

It can be obtained from Table 3 that f1/f2=-0.32 is satisfied between the effective focal length f1 of the first lens E1 and the effective focal length f2 of the second lens E2; the effective focal length f1 of the first lens E1 and the total effective focal length f of the optical imaging lens Satisfy f/f1=1.07 between; Satisfy f4/f=0.91 between the effective focal length f4 of the fourth lens E4 and the total effective focal length f of the optical imaging lens; The total optical length TTL of the optical imaging lens and the imaging surface S15 of the optical imaging lens TTL/ImgH=1.56 is satisfied between half ImgH of the diagonal length of the upper effective pixel area. Combining Table 1 and Table 3, it can be obtained that the total effective focal length f of the optical imaging lens and the radius of curvature R1 of the object side S1 of the first lens E1 satisfy f/R1=2.30; the total effective focal length f of the optical imaging lens and the fifth lens The radius of curvature R9 on the object side S9 of E5 satisfies f/|R9|=0.11; the total effective focal length f of the optical imaging lens and the radius of curvature R10 on the image side S10 of the fifth lens E5 satisfy f/|R10|=0.24; The total effective focal length f of the optical imaging lens and the curvature radius R12 of the image side S12 of the sixth lens E6 satisfy f/R12=3.21.

In Embodiment 1, f/EPD=1.68 is satisfied between the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens; 10.7°.

FIG. 2A shows the axial chromatic aberration curve of the optical imaging lens of the embodiment 1, which indicates that the focal point of light of different wavelengths after passing through the lens deviates. FIG. 2B shows the astigmatism curve of the optical imaging lens of Embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. FIG. 2C shows the distortion curve of the optical imaging lens of Embodiment 1, which represents the magnitude of distortion under different viewing angles. FIG. 2D shows the magnification chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 2A to FIG. 2D , it can be seen that the optical imaging lens provided in Embodiment 1 can achieve good imaging quality.

Example 2

The optical imaging lens according to Embodiment 2 of the present application will be described below with reference to FIGS. 3 to 4D . In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. FIG. 3 shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application.

As shown in Figure 3, the optical imaging lens includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens along the optical axis from the object side to the imaging side. E6 and imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave, and both the object side S1 and the image side S2 of the first lens E1 are aspherical.

The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave, and both the object side S3 and the image side S4 of the second lens E2 are aspherical.

The third lens E3 has a negative refractive power, its object side S5 is concave, and its image side S6 is concave, and both the object side S5 and the image side S6 of the third lens E3 are aspherical.

The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex, and both the object side S7 and the image side S8 of the fourth lens E4 are aspherical.

The fifth lens E5 has positive refractive power, its object side S9 is concave, and its image side S10 is convex, and both the object side S9 and the image side S10 of the fifth lens E5 are aspherical.

The sixth lens E6 has a negative refractive power, its object side S11 is convex, and its image side S12 is concave, and both the object side S11 and the image side S12 of the sixth lens E6 are aspherical.

Optionally, the optical imaging lens may further include a filter E7 having an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging plane S15.

Optionally, a diaphragm STO for limiting light beams may be provided between the object side and the first lens E1 to improve the imaging quality of the optical imaging lens.

Table 4 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 2, wherein the units of radius of curvature and thickness are millimeters (mm). Table 5 shows the high-order term coefficients that can be used for each aspheric mirror surface in Embodiment 2, wherein each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 6 shows the effective focal length f1 to f6 of each lens in embodiment 2, the total effective focal length f of the optical imaging lens, the optical total length TTL of the optical imaging lens, and the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens half of ImgH.

Table 4

face number A4 A6 A8 A10 A12 A14 A16 S1 6.2687E-02 8.6605E-03 -4.5636E-02 7.4360E-02 -7.1432E-02 3.4569E-02 -7.7543E-03 S2 -9.3123E-02 7.8171E-02 8.3047E-02 -3.0703E-01 3.4659E-01 -1.8953E-01 4.0751E-02 S3 -1.5378E-01 2.3354E-01 7.0522E-02 -4.4852E-01 5.2903E-01 -2.7278E-01 5.2708E-02 S4 3.3410E-02 2.6340E-02 4.4699E-01 -1.1914E+00 1.7019E+00 -1.2890E+00 4.5150E-01 S5 -1.1041E-01 -1.2281E-01 5.8468E-01 -1.6380E+00 2.5744E+00 -2.1534E+00 7.6605E-01 S6 -8.2993E-02 -6.2310E-02 9.2223E-02 -1.6090E-01 1.7545E-01 -9.5870E-02 2.2427E-02 S7 4.2345E-02 4.0006E-03 -4.0589E-02 -8.9978E-03 2.8162E-02 -1.5030E-02 2.7516E-03 S8 -6.5886E-02 1.5441E-01 -1.8932E-01 1.3690E-01 -5.6653E-02 1.2038E-02 -1.0182E-03 S9 1.3203E-01 -2.7606E-01 1.2589E-01 -3.5591E-03 -1.3014E-02 3.8295E-03 -3.5125E-04 S10 2.3162E-01 -4.3738E-01 3.0172E-01 -1.1504E-01 2.5883E-02 -3.1933E-03 1.6550E-04 S11 -2.1677E-01 1.7989E-02 6.6332E-02 -3.6138E-02 8.4840E-03 -9.7009E-04 4.4156E-05 S12 -2.1120E-01 1.4160E-01 -5.7738E-02 1.4432E-02 -2.2087E-03 1.8958E-04 -6.9285E-06

table 5

Table 6

FIG. 4A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 2, which indicates that the focal points of light rays of different wavelengths passing through the lens deviate. FIG. 4B shows the astigmatism curve of the optical imaging lens of Embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. FIG. 4C shows the distortion curve of the optical imaging lens of Embodiment 2, which represents the magnitude of distortion under different viewing angles. FIG. 4D shows the magnification chromatic aberration curve of the optical imaging lens of Embodiment 2, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. According to FIG. 4A to FIG. 4D , it can be seen that the optical imaging lens provided in Embodiment 2 can achieve good imaging quality.

Example 3

The optical imaging lens according to Embodiment 3 of the present application is described below with reference to FIGS. 5 to 6D . FIG. 5 shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application.

As shown in Figure 5, the optical imaging lens includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens in sequence from the object side to the imaging side along the optical axis. E6 and imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is convex, and both the object side S1 and the image side S2 of the first lens E1 are aspherical.

The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave, and both the object side S3 and the image side S4 of the second lens E2 are aspherical.

The third lens E3 has negative refractive power, its object side S5 is concave, and its image side S6 is convex, and both the object side S5 and the image side S6 of the third lens E3 are aspherical.

The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex, and both the object side S7 and the image side S8 of the fourth lens E4 are aspherical.

The fifth lens E5 has positive refractive power, the object side S9 is convex, the image side S10 is convex, and both the object side S9 and the image side S10 of the fifth lens E5 are aspherical.

The sixth lens E6 has a negative refractive power, its object side S11 is convex, and its image side S12 is concave, and both the object side S11 and the image side S12 of the sixth lens E6 are aspherical.

Optionally, the optical imaging lens may further include a filter E7 having an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging plane S15.

Optionally, a diaphragm STO for limiting light beams may be provided between the object side and the first lens E1 to improve the imaging quality of the optical imaging lens.

Table 7 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 3, wherein the units of radius of curvature and thickness are millimeters (mm). Table 8 shows the high-order term coefficients that can be used for each aspheric mirror surface in Embodiment 3, wherein each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 9 shows the effective focal lengths f1 to f6 of each lens in embodiment 3, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens half of ImgH.

Table 7

Table 8

Table 9

FIG. 6A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 3, which indicates that the focal points of light rays of different wavelengths passing through the lens deviate. FIG. 6B shows the astigmatism curve of the optical imaging lens of Embodiment 3, which shows meridional image plane curvature and sagittal image plane curvature. FIG. 6C shows the distortion curves of the optical imaging lens of Embodiment 3, which represent the distortion values under different viewing angles. FIG. 6D shows the magnification chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. According to FIG. 6A to FIG. 6D , it can be seen that the optical imaging lens provided in Embodiment 3 can achieve good imaging quality.

Example 4

The optical imaging lens according to Embodiment 4 of the present application is described below with reference to FIGS. 7 to 8D . FIG. 7 shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application.

As shown in Figure 7, the optical imaging lens includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens along the optical axis from the object side to the imaging side. E6 and imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave, and both the object side S1 and the image side S2 of the first lens E1 are aspherical.

The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave, and both the object side S3 and the image side S4 of the second lens E2 are aspherical.

The third lens E3 has a negative refractive power, its object side S5 is convex, and its image side S6 is concave, and both the object side S5 and the image side S6 of the third lens E3 are aspherical.

The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex, and both the object side S7 and the image side S8 of the fourth lens E4 are aspherical.

The fifth lens E5 has negative refractive power, its object side S9 is concave, and its image side S10 is concave, and both the object side S9 and the image side S10 of the fifth lens E5 are aspherical.

The sixth lens E6 has negative refractive power, its object side S11 is convex, and its image side S12 is concave, and both the object side S11 and the image side S12 of the sixth lens E6 are aspherical.

Optionally, the optical imaging lens may further include a filter E7 having an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging plane S15.

Optionally, a diaphragm STO for limiting light beams may be provided between the object side and the first lens E1 to improve the imaging quality of the optical imaging lens.

Table 10 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 4, wherein the units of radius of curvature and thickness are millimeters (mm). Table 11 shows the high-order term coefficients that can be used for each aspheric mirror surface in Embodiment 4, wherein each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 12 shows the effective focal lengths f1 to f6 of each lens in embodiment 4, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens half of ImgH.

Table 10

face number A4 A6 A8 A10 A12 A14 A16 S1 6.1230E-02 9.6914E-03 -5.1005E-02 7.8296E-02 -7.1415E-02 3.3084E-02 -6.9589E-03 S2 -1.2414E-01 1.6440E-01 -3.9313E-02 -1.9603E-01 2.7475E-01 -1.5843E-01 3.4275E-02 S3 -1.8033E-01 3.5444E-01 -1.2398E-01 -3.0374E-01 4.9972E-01 -2.9791E-01 6.3553E-02 S4 2.1451E-02 1.5404E-01 -1.5537E-02 -1.1853E-01 1.0508E-01 5.1356E-02 -2.8879E-02 S5 -1.2527E-01 -9.9046E-04 7.5964E-03 -1.0241E-01 2.8890E-01 -3.6913E-01 1.9943E-01 S6 -8.5292E-02 -3.2348E-02 8.2299E-03 -4.9017E-02 8.9898E-02 -6.4413E-02 1.9961E-02 S7 2.6421E-02 1.9031E-02 -5.9176E-02 -8.5956E-03 3.6390E-02 -2.1129E-02 4.3941E-03 S8 -6.4075E-02 1.3629E-01 -1.5878E-01 9.8196E-02 -3.1266E-02 4.2273E-03 -1.0927E-04 S9 9.8044E-02 -1.8956E-01 3.7191E-02 4.3633E-02 -2.6347E-02 5.6607E-03 -4.4081E-04 S10 1.8839E-01 -3.4407E-01 2.1472E-01 -7.4134E-02 1.5413E-02 -1.7953E-03 8.9108E-05 S11 -1.7275E-01 1.0926E-02 4.5365E-02 -2.2304E-02 4.7859E-03 -5.0298E-04 2.1086E-05 S12 -1.8744E-01 1.1148E-01 -3.9727E-02 8.4697E-03 -1.0740E-03 7.4205E-05 -2.1123E-06

Table 11

Table 12

FIG. 8A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 4, which indicates that the focal points of light rays of different wavelengths passing through the lens deviate. FIG. 8B shows the astigmatism curves of the optical imaging lens of Embodiment 4, which represent meridional image plane curvature and sagittal image plane curvature. FIG. 8C shows the distortion curves of the optical imaging lens of Embodiment 4, which represent the distortion values under different viewing angles. FIG. 8D shows the magnification chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 8A to FIG. 8D , it can be known that the optical imaging lens provided in Embodiment 4 can achieve good imaging quality.

Example 5

The optical imaging lens according to Embodiment 5 of the present application is described below with reference to FIGS. 9 to 10D . FIG. 9 shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application.

As shown in Figure 9, the optical imaging lens includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens along the optical axis from the object side to the imaging side. E6 and imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave, and both the object side S1 and the image side S2 of the first lens E1 are aspherical.

The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave, and both the object side S3 and the image side S4 of the second lens E2 are aspherical.

The third lens E3 has a negative refractive power, its object side S5 is convex, and its image side S6 is concave, and both the object side S5 and the image side S6 of the third lens E3 are aspherical.

The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex, and both the object side S7 and the image side S8 of the fourth lens E4 are aspherical.

The fifth lens E5 has negative refractive power, its object side S9 is concave, and its image side S10 is convex, and both the object side S9 and the image side S10 of the fifth lens E5 are aspherical.

The sixth lens E6 has a negative refractive power, its object side S11 is convex, and its image side S12 is concave, and both the object side S11 and the image side S12 of the sixth lens E6 are aspherical.

Optionally, the optical imaging lens may further include a filter E7 having an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging plane S15.

Optionally, a diaphragm STO for limiting light beams may be provided between the object side and the first lens E1 to improve the imaging quality of the optical imaging lens.

Table 13 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 5, where the units of radius of curvature and thickness are millimeters (mm). Table 14 shows the high-order term coefficients that can be used for each aspheric mirror surface in Embodiment 5, wherein each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 15 shows the effective focal lengths f1 to f6 of each lens in Embodiment 5, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens half of ImgH.

Table 13

face number A4 A6 A8 A10 A12 A14 A16 S1 6.0555E-02 5.8092E-03 -3.9480E-02 5.8671E-02 -5.2338E-02 2.3803E-02 -5.0346E-03 S2 -1.1654E-01 1.2450E-01 5.3256E-02 -3.1606E-01 3.6955E-01 -2.0285E-01 4.3708E-02 S3 -1.7228E-01 2.8757E-01 8.3000E-02 -6.2173E-01 7.8280E-01 -4.3955E-01 9.3372E-02 S4 2.2603E-02 1.2581E-01 8.2631E-02 -2.2266E-01 9.3248E-02 1.6527E-01 -9.7760E-02 S5 -1.2894E-01 2.4952E-03 -1.8943E-02 3.6619E-03 9.6905E-02 -1.9447E-01 1.3534E-01 S6 -8.4146E-02 -3.5177E-02 7.2855E-03 -3.4277E-02 6.4405E-02 -4.5877E-02 1.5085E-02 S7 3.3380E-02 -1.8211E-02 2.5208E-02 -1.2361E-01 1.2591E-01 -5.7510E-02 1.0340E-02 S8 -6.8643E-02 1.4479E-01 -1.8285E-01 1.2190E-01 -4.0771E-02 5.4992E-03 -8.5891E-05 S9 8.7425E-02 -1.5107E-01 -2.9102E-02 9.8208E-02 -4.9810E-02 1.0762E-02 -8.8214E-04 S10 1.9566E-01 -3.4582E-01 2.1208E-01 -7.0951E-02 1.4058E-02 -1.5267E-03 6.8260E-05 S11 -1.7476E-01 1.3446E-02 4.2603E-02 -2.0705E-02 4.3014E-03 -4.2969E-04 1.6715E-05 S12 -1.7663E-01 1.0740E-01 -4.0417E-02 9.2473E-03 -1.2904E-03 1.0147E-04 -3.4208E-06

Table 14

Table 15

FIG. 10A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 5, which indicates that the focal points of light rays of different wavelengths passing through the lens deviate. FIG. 10B shows the astigmatism curve of the optical imaging lens of Embodiment 5, which shows meridional image plane curvature and sagittal image plane curvature. FIG. 10C shows the distortion curves of the optical imaging lens of Embodiment 5, which represent the distortion values under different viewing angles. FIG. 10D shows the magnification chromatic aberration curve of the optical imaging lens of Embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 10A to FIG. 10D , it can be seen that the optical imaging lens provided in Embodiment 5 can achieve good imaging quality.

Example 6

The optical imaging lens according to Embodiment 6 of the present application is described below with reference to FIGS. 11 to 12D . FIG. 11 shows a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application.

As shown in Figure 11, the optical imaging lens includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens in sequence from the object side to the imaging side along the optical axis. E6 and imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave, and both the object side S1 and the image side S2 of the first lens E1 are aspherical.

The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave, and both the object side S3 and the image side S4 of the second lens E2 are aspherical.

The third lens E3 has a negative refractive power, its object side S5 is convex, and its image side S6 is concave, and both the object side S5 and the image side S6 of the third lens E3 are aspherical.

The fourth lens E4 has positive refractive power, its object side S7 is convex, and its image side S8 is convex, and both the object side S7 and the image side S8 of the fourth lens E4 are aspherical.

The fifth lens E5 has positive refractive power, its object side S9 is concave, and its image side S10 is convex, and both the object side S9 and the image side S10 of the fifth lens E5 are aspherical.

The sixth lens E6 has a negative refractive power, its object side S11 is convex, and its image side S12 is concave, and both the object side S11 and the image side S12 of the sixth lens E6 are aspherical.

Optionally, the optical imaging lens may further include a filter E7 having an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging plane S15.

Optionally, a diaphragm STO for limiting light beams may be provided between the object side and the first lens E1 to improve the imaging quality of the optical imaging lens.

Table 16 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 6, where the units of radius of curvature and thickness are millimeters (mm). Table 17 shows the high-order term coefficients that can be used for each aspheric mirror surface in Embodiment 6, wherein each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 18 shows the effective focal lengths f1 to f6 of each lens in embodiment 6, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens half of ImgH.

Table 16

face number A4 A6 A8 A10 A12 A14 A16 S1 6.1804E-02 3.4033E-03 -3.4696E-02 5.8950E-02 -6.0090E-02 3.0669E-02 -7.2163E-03 S2 -1.0144E-01 1.0806E-01 1.4464E-02 -2.0290E-01 2.4999E-01 -1.4087E-01 3.0573E-02 S3 -1.6119E-01 2.5986E-01 2.7605E-02 -3.7524E-01 4.3038E-01 -2.0243E-01 3.2002E-02 S4 3.1557E-02 5.7324E-02 2.7530E-01 -6.2792E-01 7.1338E-01 -4.1032E-01 1.3174E-01 S5 -1.1395E-01 -1.6726E-01 8.0150E-01 -2.1428E+00 3.2208E+00 -2.5841E+00 8.8092E-01 S6 -9.8597E-02 -6.1531E-02 1.1663E-01 -2.0560E-01 2.1471E-01 -1.1364E-01 2.5674E-02 S7 2.3282E-02 1.6671E-02 -4.8096E-02 6.1130E-03 1.2506E-02 -8.0734E-03 1.6092E-03 S8 -5.7454E-02 1.1753E-01 -1.2888E-01 8.9872E-02 -3.7302E-02 7.9728E-03 -6.7447E-04 S9 1.2721E-01 -2.8510E-01 1.4365E-01 -1.4727E-02 -9.6776E-03 3.3687E-03 -3.2997E-04 S10 2.4459E-01 -4.6426E-01 3.2676E-01 -1.2764E-01 2.9345E-02 -3.6789E-03 1.9267E-04 S11 -2.1334E-01 1.8068E-02 6.4621E-02 -3.4958E-02 8.1245E-03 -9.1807E-04 4.1233E-05 S12 -2.0793E-01 1.4170E-01 -5.8523E-02 1.4868E-02 -2.3286E-03 2.0683E-04 -7.9281E-06

Table 17

Table 18

FIG. 12A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 6, which indicates that the focal points of light rays of different wavelengths passing through the lens deviate. FIG. 12B shows the astigmatism curve of the optical imaging lens of Embodiment 6, which shows meridional image plane curvature and sagittal image plane curvature. FIG. 12C shows the distortion curves of the optical imaging lens of Embodiment 6, which represent the distortion values under different viewing angles. FIG. 12D shows the magnification chromatic aberration curve of the optical imaging lens of Embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 12A to FIG. 12D , it can be seen that the optical imaging lens provided in Embodiment 6 can achieve good imaging quality.

Example 7

The optical imaging lens according to Embodiment 7 of the present application is described below with reference to FIGS. 13 to 14D . FIG. 13 shows a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application.

As shown in Figure 13, the optical imaging lens includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens in sequence from the object side to the imaging side along the optical axis. E6 and imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave, and both the object side S1 and the image side S2 of the first lens E1 are aspherical.

The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave, and both the object side S3 and the image side S4 of the second lens E2 are aspherical.

The third lens E3 has a negative refractive power, its object side S5 is convex, and its image side S6 is concave, and both the object side S5 and the image side S6 of the third lens E3 are aspherical.

The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex, and both the object side S7 and the image side S8 of the fourth lens E4 are aspherical.

The fifth lens E5 has positive refractive power, its object side S9 is concave, and its image side S10 is convex, and both the object side S9 and the image side S10 of the fifth lens E5 are aspherical.

The sixth lens E6 has negative refractive power, the object side S11 is concave, the image side S12 is concave, and both the object side S11 and the image side S12 of the sixth lens E6 are aspherical.

Optionally, the optical imaging lens may further include a filter E7 having an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging plane S15.

Optionally, a diaphragm STO for limiting light beams may be provided between the object side and the first lens E1 to improve the imaging quality of the optical imaging lens.

Table 19 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 7, where the units of radius of curvature and thickness are millimeters (mm). Table 20 shows the high-order term coefficients that can be used for each aspheric mirror surface in Embodiment 7, wherein each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 21 shows the effective focal lengths f1 to f6 of each lens in Embodiment 7, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens half of ImgH.

Table 19

Table 20

Table 21

FIG. 14A shows the axial chromatic aberration curve of the optical imaging lens of Example 7, which indicates that the focal points of light rays of different wavelengths passing through the lens deviate. FIG. 14B shows the astigmatism curve of the optical imaging lens of Embodiment 7, which shows meridional image plane curvature and sagittal image plane curvature. FIG. 14C shows the distortion curves of the optical imaging lens of Embodiment 7, which represent the distortion values under different viewing angles. FIG. 14D shows the magnification chromatic aberration curve of the optical imaging lens of Embodiment 7, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 14A to FIG. 14D , it can be seen that the optical imaging lens provided in Embodiment 7 can achieve good imaging quality.

Example 8

An optical imaging lens according to Embodiment 8 of the present application is described below with reference to FIGS. 15 to 16D . FIG. 15 shows a schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application.

As shown in Figure 15, the optical imaging lens includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens in sequence from the object side to the imaging side along the optical axis. E6 and imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave, and both the object side S1 and the image side S2 of the first lens E1 are aspherical.

The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave, and both the object side S3 and the image side S4 of the second lens E2 are aspherical.

The third lens E3 has a negative refractive power, its object side S5 is convex, and its image side S6 is concave, and both the object side S5 and the image side S6 of the third lens E3 are aspherical.

The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex, and both the object side S7 and the image side S8 of the fourth lens E4 are aspherical.

The fifth lens E5 has positive refractive power, its object side S9 is concave, and its image side S10 is convex, and both the object side S9 and the image side S10 of the fifth lens E5 are aspherical.

The sixth lens E6 has a negative refractive power, its object side S11 is convex, and its image side S12 is concave, and both the object side S11 and the image side S12 of the sixth lens E6 are aspherical.

Optionally, the optical imaging lens may further include a filter E7 having an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging plane S15.

Optionally, a diaphragm STO for limiting light beams may be provided between the object side and the first lens E1 to improve the imaging quality of the optical imaging lens.

Table 22 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 8, wherein the units of radius of curvature and thickness are millimeters (mm). Table 23 shows the high-order term coefficients that can be used for each aspheric mirror surface in Embodiment 8, wherein each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 24 shows the effective focal lengths f1 to f6 of each lens in Embodiment 8, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens half of ImgH.

Table 22

face number A4 A6 A8 A10 A12 A14 A16 S1 6.1837E-02 -2.9733E-04 -3.0053E-02 5.5907E-02 -5.9103E-02 3.0452E-02 -6.7809E-03 S2 -1.2415E-01 1.7790E-01 -1.4983E-01 1.0919E-01 -1.2135E-01 8.9936E-02 -2.6450E-02 S3 -1.7685E-01 3.5182E-01 -2.0997E-01 6.6223E-02 -1.1206E-01 1.6445E-01 -7.0782E-02 S4 1.8047E-02 1.7774E-01 -1.0651E-01 1.5061E-01 -3.2325E-01 4.0698E-01 -1.5425E-01 S5 -1.2481E-01 -1.9806E-02 6.0802E-02 -1.3055E-01 2.0630E-01 -2.2318E-01 1.2821E-01 S6 -8.5553E-02 -2.4181E-02 -3.2193E-02 3.6590E-02 -1.9870E-03 -1.5447E-02 9.8993E-03 S7 3.4535E-02 -1.3846E-02 -4.7239E-03 -7.2329E-02 8.6801E-02 -4.3572E-02 8.4484E-03 S8 -5.5323E-02 1.0516E-01 -1.4195E-01 1.0406E-01 -3.9620E-02 6.8561E-03 -3.7311E-04 S9 8.4168E-02 -1.5180E-01 -2.5127E-02 9.2761E-02 -4.6599E-02 9.9491E-03 -8.0889E-04 S10 1.9624E-01 -3.4144E-01 2.0476E-01 -6.6321E-02 1.2664E-02 -1.3195E-03 5.5601E-05 S11 -1.8011E-01 1.4125E-02 4.4682E-02 -2.1922E-02 4.5761E-03 -4.5554E-04 1.7374E-05 S12 -1.7873E-01 1.0995E-01 -4.2208E-02 9.9545E-03 -1.4527E-03 1.2120E-04 -4.3871E-06

Table 23

Table 24

FIG. 16A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 8, which indicates that the focal points of light rays of different wavelengths passing through the lens deviate. FIG. 16B shows the astigmatism curve of the optical imaging lens of Embodiment 8, which shows meridional image plane curvature and sagittal image plane curvature. FIG. 16C shows the distortion curves of the optical imaging lens of Embodiment 8, which represent the distortion values under different viewing angles. FIG. 16D shows the magnification chromatic aberration curve of the optical imaging lens of Embodiment 8, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 16A to FIG. 16D , it can be seen that the optical imaging lens provided in Embodiment 8 can achieve good imaging quality.

Example 9

An optical imaging lens according to Embodiment 9 of the present application is described below with reference to FIGS. 17 to 18D . FIG. 17 shows a schematic structural diagram of an optical imaging lens according to Embodiment 9 of the present application.

As shown in Figure 17, the optical imaging lens includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens in sequence from the object side to the imaging side along the optical axis. E6 and imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave, and both the object side S1 and the image side S2 of the first lens E1 are aspherical.

The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave, and both the object side S3 and the image side S4 of the second lens E2 are aspherical.

The third lens E3 has positive refractive power, its object side S5 is convex, and its image side S6 is convex, and both the object side S5 and the image side S6 of the third lens E3 are aspherical.

The fourth lens E4 has positive refractive power, its object side S7 is concave, and its image side S8 is convex, and both the object side S7 and the image side S8 of the fourth lens E4 are aspherical.

The fifth lens E5 has positive refractive power, its object side S9 is concave, and its image side S10 is convex, and both the object side S9 and the image side S10 of the fifth lens E5 are aspherical.

The sixth lens E6 has a negative refractive power, its object side S11 is convex, and its image side S12 is concave, and both the object side S11 and the image side S12 of the sixth lens E6 are aspherical.

Optionally, the optical imaging lens may further include a filter E7 having an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging plane S15.

Optionally, a diaphragm STO for limiting light beams may be provided between the object side and the first lens E1 to improve the imaging quality of the optical imaging lens.

Table 25 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 9, where the units of radius of curvature and thickness are millimeters (mm). Table 26 shows the high-order term coefficients that can be used for each aspheric mirror surface in Embodiment 9, wherein each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 27 shows the effective focal lengths f1 to f6 of each lens in Embodiment 9, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens half of ImgH.

Table 25

face number A4 A6 A8 A10 A12 A14 A16 S1 5.4661E-02 2.0126E-02 -1.0234E-01 1.9923E-01 -2.1979E-01 1.2442E-01 -2.9404E-02 S2 -1.1236E-01 1.8584E-01 -1.3845E-01 -2.3930E-02 1.2707E-01 -9.0198E-02 1.9613E-02 S3 -1.9766E-01 4.4557E-01 -3.4579E-01 -9.2077E-02 4.5219E-01 -3.5421E-01 9.1892E-02 S4 3.3993E-02 1.7743E-01 -1.7989E-01 1.8027E-01 -2.6894E-01 3.4322E-01 -1.5499E-01 S5 -1.0733E-01 7.4068E-02 -4.0322E-01 1.0092E+00 -1.3669E+00 9.4378E-01 -2.4627E-01 S6 -6.2493E-02 -6.9770E-02 1.5363E-01 -2.9558E-01 3.2357E-01 -1.8233E-01 4.3273E-02 S7 2.8019E-02 6.2693E-03 -4.8186E-02 3.5442E-02 -1.5537E-02 3.2405E-03 -1.7281E-04 S8 -4.5520E-02 7.2976E-02 -9.4583E-02 8.1151E-02 -3.7846E-02 8.7795E-03 -8.0679E-04 S9 1.3842E-01 -2.6811E-01 1.5291E-01 -4.4325E-02 7.5135E-03 -7.1773E-04 2.7922E-05 S10 1.9802E-01 -3.5615E-01 2.2605E-01 -7.7140E-02 1.5180E-02 -1.6042E-03 6.9694E-05 S11 -1.9383E-01 1.5184E-02 5.2852E-02 -2.7222E-02 6.0493E-03 -6.5550E-04 2.8332E-05 S12 -1.8885E-01 1.2297E-01 -4.8187E-02 1.1149E-02 -1.5087E-03 1.0826E-04 -3.0459E-06

Table 26

Table 27

FIG. 18A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 9, which indicates that the focal points of light rays of different wavelengths passing through the lens deviate. FIG. 18B shows the astigmatism curves of the optical imaging lens of Embodiment 9, which represent meridional image plane curvature and sagittal image plane curvature. FIG. 18C shows the distortion curves of the optical imaging lens of Embodiment 9, which represent the distortion values under different viewing angles. FIG. 18D shows the magnification chromatic aberration curve of the optical imaging lens of Embodiment 9, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 18A to FIG. 18D , it can be seen that the optical imaging lens provided in Embodiment 9 can achieve good imaging quality.

To sum up, Embodiment 1 to Embodiment 9 respectively satisfy the relationship shown in Table 28 below.

conditional\example 1 2 3 4 5 6 7 8 9 f/EPD 1.68 1.68 1.70 1.69 1.70 1.69 1.78 1.69 1.68 f/|R9| 0.11 0.07 0.10 0.00 0.27 0.15 0.16 0.27 0.13 f/|R10| 0.24 0.18 0.15 0.08 0.26 0.28 0.42 0.39 0.20 TTL/ImgH 1.56 1.56 1.56 1.56 1.56 1.56 1.56 1.56 1.64 f1/f2 -0.32 -0.32 -0.50 -0.37 -0.32 -0.33 -0.36 -0.33 -0.57 f/f1 1.07 1.06 1.34 1.11 1.08 1.05 1.10 1.08 1.16 CT1/CT2 3.09 2.98 3.40 3.24 3.38 2.96 3.13 3.41 2.27 f/R12 3.21 3.25 2.93 3.09 3.14 3.13 2.93 3.15 3.79 f/R1 2.30 2.31 2.14 2.30 2.31 2.31 2.34 2.31 2.03 f4/f 0.91 0.92 1.04 0.94 0.84 0.86 0.85 0.87 1.03 V1/V2 3.14 3.14 3.14 2.96 3.14 3.14 3.14 3.11 2.23 β62(°) 10.7 10.5 10.3 10.4 11.0 9.0 8.3 9.8 10.4

Table 28

The present application also provides an imaging device, the electronic photosensitive element of which can be a photosensitive coupling device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, but should also cover the technical solution formed by the above-mentioned technical features without departing from the inventive concept. Other technical solutions formed by any combination of or equivalent features thereof. For example, a technical solution formed by replacing the above-mentioned features with technical features with similar functions disclosed in (but not limited to) this application.

Claims (10)

1. The optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens,

the first lens has positive optical power;

the second lens, the third lens and the sixth lens each have a negative optical power;

the fourth lens and the fifth lens each have positive optical power;

the object side surface of the first lens and the image side surface of the fourth lens are convex surfaces;

the image side surface of the second lens and the image side surface of the sixth lens are both concave surfaces;

the number of lenses having focal power in the optical imaging lens is six;

the effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens meet the condition that f4/f is more than 0.7 and less than 1.2; and

the total effective focal length f of the optical imaging lens and the curvature radius R9 of the object side surface of the fifth lens meet the condition that f/| R9| is less than or equal to 0.35.

2. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy f/EPD ≦ 1.8.

3. The optical imaging lens according to claim 2, wherein an effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy-1 < f1/f2 < 0.

4. The optical imaging lens according to claim 2, wherein the total effective focal length f of the optical imaging lens and the effective focal length f1 of the first lens satisfy 1 < f/f1 < 1.5.

5. The optical imaging lens of claim 2, wherein a central thickness CT1 of the first lens element on the optical axis and a central thickness CT2 of the second lens element on the optical axis satisfy 2.0 < CT1/CT2 < 3.5.

6. The optical imaging lens of claim 2, wherein the total effective focal length f of the optical imaging lens and the radius of curvature R12 of the image side surface of the sixth lens satisfy 2.5 < f/R12 < 4.0.

7. The optical imaging lens of claim 2, wherein the total effective focal length f of the optical imaging lens and the radius of curvature R1 of the object side surface of the first lens satisfy 2 ≦ f/R1 < 2.5.

8. The optical imaging lens according to claim 2, wherein the abbe number V1 of the first lens and the abbe number V2 of the second lens satisfy 2.0 < V1/V2 < 4.0.

9. The optical imaging lens according to claim 2, characterized in that an incident angle β 62 of the upper rays of the maximum field of view on the image side surface of the sixth lens satisfies 7 ° < β 62 < 12 °.

10. The optical imaging lens of any one of claims 1 to 9, wherein a distance TTL between a center of an object side surface of the first lens element and an imaging surface of the optical imaging lens on the optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens satisfy TTL/ImgH ≦ 1.7.

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