CN102207605B - Thin pick-up lens - Google Patents
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- CN102207605B CN102207605B CN 201010158755 CN201010158755A CN102207605B CN 102207605 B CN102207605 B CN 102207605B CN 201010158755 CN201010158755 CN 201010158755 CN 201010158755 A CN201010158755 A CN 201010158755A CN 102207605 B CN102207605 B CN 102207605B
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- 239000004065 semiconductor Substances 0.000 description 3
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Abstract
The invention provides a thin pick-up lens, from an object side to an image side, orderly comprising: a first lens with positive refracting power, a second lens with negative refracting power and a diaphragm. An object side surface of the first lens is a convex surface while an image side surface of the first lens is a concave surface, and at least one of the object side surface and the image side surface of the first lens is an aspheric surface; the object side surface of the second lens is the concave surface while the image side surface thereof is the convex surface, and at least one of the object side surface and the image side surface of the second lens is the aspheric surface; and the diaphragm is arranged between the first lens and the second lens. The thin pick-up lens only comprises two pieces of lenses with the refracting power. By means of the above configuration mode, total length of the lens can be effectively shortened, system sensitiveness can be reduced, and better imaging quality can be obtained.
Description
Technical field
The invention relates to a kind of thin type photographing camera lens; Particularly about a kind of small-sized thin type photographing camera lens that is applied to mobile phone camera.
Background technology
Recent years, along with the development of mobile phone camera, the demand of slimming phtographic lens day by day improves; And the photo-sensitive cell of general phtographic lens is nothing more than being sensitization coupling element (Charge Coupled Device; And progressing greatly CCD) or two kinds of complementary matal-oxide semiconductor elements (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor), along with the manufacture of semiconductor technology; Make the Pixel Dimensions of photo-sensitive cell dwindle; Add now that electronic product is a development trend with the good and compact external form of function, therefore, the slim phtographic lens that possesses good image quality becomes main flow in the market.
Tradition is equipped on the phtographic lens of mobile phone camera, and for considering the revisal of aberration, it is main adopting with the three-chip type lens arrangement more; Wherein the most general is positive and negative positive Triplet pattern, but when Lens during constantly toward lightening dwindling, the system imaging space is also and then tightened; Therefore make inserting of three lens become difficult; And in limited space, the thickness of eyeglass also need and then dwindle, and is bad with its material uniformity coefficient of eyeglass of plastic rubber ejaculate molding made with making.
In order effectively to reduce the camera lens total length and to take into account the yield that eyeglass is made, the pick-up lens that only contains two lens is feasible scheme.United States Patent (USP) the 7th, 463 provides a kind of thin type photographing camera lens that is made up of two lens No. 433; It is first lens of the positive refracting power of a tool and second lens of the negative refracting power of a tool as side extremely by the thing side in regular turn; Structure even so can provide good resolving power and keep lightening characteristic, but because its first lens are adopted with two sides biconvex form, makes the refracting power of each lens of system strengthen relatively; Be prone to cause the susceptibility of optical system to increase, comparatively difficult to the control of making yield.
In view of this, be badly in need of a kind of high-pixel mobile phone camera that can be used for, processing procedure is simple and easy and be unlikely to make the thin type photographing camera lens that the camera lens total length is long and the optical system susceptibility is too high.
Summary of the invention
The present invention provides a kind of thin type photographing camera lens; Extremely comprise in regular turn by the thing side: first lens of the positive refracting power of a tool as side; Its thing side surface is convex surface and is concave surface as side surface, and the thing side surface of these first lens be aspheric surface as at least one surface in the side surface; Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are convex surface as side surface, and the thing side surface of these second lens be aspheric surface as at least one surface in the side surface; And an aperture, be arranged between these first lens and this second lens; The lens of tool refracting power are merely two in this thin type photographing camera lens; The focal length of wherein whole thin type photographing camera lens is f; The focal length of said first lens is f1, and the focal length of these second lens is f2, and the thing side surface radius-of-curvature of these second lens is R3; These second lens be R4 as the side surface radius-of-curvature; The thickness of these second lens on optical axis is CT2, and this thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging in the imaging surface place, and the distance of this aperture to this sense electronics optical element on optical axis is SL; The distance of the thing side surface of these first lens to this sense electronics optical element on optical axis is TTL, satisfies the following relationship formula :-1.20 < f/>f2 < 0.10;-0.34 ≦ f1/>f2 < 0.06; 0.08 < R3/>R4 < 0.90; 0.20 < CT2/>f < 0.70; 0.60 < SL/>TTL < 0.90.
On the other hand; The present invention provides a kind of thin type photographing camera lens; By the thing side to comprising in regular turn as side: first lens of the positive refracting power of a tool, its thing side surface are convex surface and are concave surface as side surface, and the thing side surface of these first lens and be all aspheric surface as side surface; Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are convex surface as side surface, and the thing side surface of these second lens and be all aspheric surface as side surface; And an aperture, be arranged between these first lens and this second lens; The lens of tool refracting power are merely two in this thin type photographing camera lens; Wherein the thickness of these second lens on optical axis is CT2; The thickness of these first lens on optical axis is CT1, and the focal length of these first lens is f1, and the focal length of these second lens is f2; These second lens be Bf as the distance of side surface to imaging surface on optical axis; The focal length of whole thin type photographing camera lens is f, and this thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging in this imaging surface place, and the distance of this aperture to this sense electronics optical element on optical axis is SL; The distance of the thing side surface of these first lens to this sense electronics optical element on optical axis is TTL, satisfies the following relationship formula: 1.4 < CT2/>CT1 < 4.0;-0.34 ≦ f1/>f2 < 0.06; 0.10 < Bf/>f < 0.55; 0.60 < SL/>TTL < 0.90.
Again on the other hand; The present invention provides a kind of thin type photographing camera lens; By the thing side to comprising in regular turn as side: first lens of the positive refracting power of a tool, its thing side surface are convex surface and are concave surface as side surface, and the thing side surface of these first lens be aspheric surface as at least one surface in the side surface; Second lens of the negative refracting power of one tool, it is crescent lens, and the thing side surface of these second lens be aspheric surface as at least one surface in the side surface; And an aperture, be arranged between these first lens and this second lens; The lens of tool refracting power are merely two in this thin type photographing camera lens; Wherein the abbe number of these first lens is V1; The abbe number of these second lens is V2, and the focal length of whole thin type photographing camera lens is f, and the focal length of said first lens is f1; The focal length of these second lens is f2; This thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging in the imaging surface place, and the distance of this aperture to this sense electronics optical element on optical axis is SL, and the distance of the thing side surface of these first lens to this sense electronics optical element on optical axis is TTL; Satisfy the following relationship formula: 25.0 < V1-V2 < 40.0, V2 < 28.5;-1.20 < f/>f2 < 0.10;-0.34 ≦ f1/>f2 < 0.06; 0.60 < SL/>TTL < 0.90.
The present invention can effectively shorten total length, the reduction system sensitivity of camera lens, and can obtain good image quality by the configuration mode of above-mentioned mirror group.
In the thin type photographing camera lens of the present invention, the positive refracting power of this first lens tool, its thing side surface are convex surface and are concave surface as side surface, provide system main refracting power, and help the astigmatism (Astigmatism) of update the system simultaneously; This second lens tool is born refracting power, and the aberration that can be effectively these first lens of the positive refracting power of tool be produced is done revisal, and helps the aberration of update the system simultaneously.
In the thin type photographing camera lens of the present invention; These second lens can be a thing side surface to be concave surface and to be the crescent lens of convex surface as side surface; This lens shape effectively compact system marginal ray is incident in the angle on this photo-sensitive cell; The luminous sensitivity of raising system, and when these first lens and this second lens were crescent lens simultaneously, the refracting power of each lens of system can be not strong excessively; Can effectively reduce the susceptibility of system and avoid the excessive increase of higher order aberratons, with the image quality of elevator system.
This aperture is arranged between these first lens and this second lens in the aforementioned thin type photographing camera lens of the present invention.By these first lens positive refracting power is provided, and when aperture placed the object side near this thin type photographing camera lens, can effectively shortens the optics total length of this thin type photographing camera lens.In addition; Above-mentioned configuration can make the outgoing pupil (Exit Pupil) of this thin type photographing camera lens away from imaging surface, and therefore, light will be incident on the mode near vertical incidence on the photo-sensitive cell; This is the heart far away (Telecentric) characteristic of picture side; Heart characteristic far away is very important for the photoperceptivity of now solid-state electronic photo-sensitive cell, can make the sensitization susceptibility of sense electronics optical element improve, and the minimizing system produces the possibility at dark angle.In addition; Wide-angle also is the key property of present pick-up lens; In wide-angle optics; Need do correction to distorting (Distortion) and multiplying power look receipts poor (Chromatic Aberration of Magnification) especially, its method is for to place system light flexion equilibrium of forces place with aperture.Therefore, this aperture is arranged between these first lens and this second lens in the thin type photographing camera lens of the present invention, its objective is on heart characteristic far away and wide-angle characteristic to obtain well balanced.
Description of drawings
Figure 1A is the optical system synoptic diagram of first embodiment of the invention;
Figure 1B is the aberration curve figure of first embodiment of the invention;
Fig. 2 A is the optical system synoptic diagram of second embodiment of the invention;
Fig. 2 B is the aberration curve figure of second embodiment of the invention;
Fig. 3 A is the optical system synoptic diagram of third embodiment of the invention;
Fig. 3 B is the aberration curve figure of third embodiment of the invention;
Fig. 4 is a table one, is the optical data of first embodiment of the invention;
Fig. 5 is a table two, is the aspherical surface data of first embodiment of the invention;
Fig. 6 is a table three, is the optical data of second embodiment of the invention;
Fig. 7 is a table four, is the aspherical surface data of second embodiment of the invention;
Fig. 8 is a table five, is the optical data of third embodiment of the invention;
Fig. 9 is a table six, is the aspherical surface data of third embodiment of the invention;
Figure 10 is a table seven, is the numeric data of first embodiment of the invention to the three embodiment correlationship formulas.
Drawing reference numeral
First lens 100,200,300
Thing side surface 101,201,301
Picture side surface 102,202,302
Second lens 110,210,310
Thing side surface 111,211,311
Picture side surface 112,212,312
Aperture 120,220,320
Infrared ray filtering optical filter 130,230,330
Imaging surface 140,250,340
The focal length of whole thin type photographing camera lens is f
The focal length of first lens is f1
The focal length of second lens is f2
The abbe number of first lens is V1
The abbe number of second lens is V2
The thing side surface radius-of-curvature of first lens is R1
First lens be R2 as the side surface radius-of-curvature
The thing side surface radius-of-curvature of second lens is R3
Second lens be R4 as the side surface radius-of-curvature
The thickness of first lens on optical axis is CT1
The thickness of second lens on optical axis is CT2
Second lens the picture side surface to imaging surface on optical axis apart from Bf
The distance of aperture to sense electronics optical element on optical axis is SL
The distance of thing side surface to sense electronics optical element on optical axis of first lens is TTL
The half the of sense electronics optical element effective pixel area diagonal angle line length is ImgH
Embodiment
The present invention provides a kind of thin type photographing camera lens; Extremely comprise in regular turn by the thing side: first lens of the positive refracting power of a tool as side; Its thing side surface is convex surface and is concave surface as side surface, and the thing side surface of these first lens be aspheric surface as at least one surface in the side surface; Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are convex surface as side surface, and the thing side surface of these second lens be aspheric surface as at least one surface in the side surface; And an aperture, be arranged between these first lens and this second lens; The lens of tool refracting power are merely two in this thin type photographing camera lens; The focal length of wherein whole thin type photographing camera lens is f; The focal length of these second lens is f2; The thing side surface radius-of-curvature of these second lens is R3, these second lens be R4 as the side surface radius-of-curvature, the thickness of these second lens on optical axis is CT2; This thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging in the imaging surface place; The distance of this aperture to this sense electronics optical element on optical axis is SL, and the distance of the thing side surface of these first lens to this sense electronics optical element on optical axis is TTL, satisfies the following relationship formula :-1.20 < f/>f2 < 0.10; 0.08 < R3/>R4 < 0.90; 0.20 < CT2/>f < 0.70; 0.60 < SL/>TTL < 0.90.
When aforementioned thin type photographing camera lens satisfies the following relationship formula :-1.20 < f/>f2 < 0.10, can help the correction of aberration in the thin type photographing camera lens; Further, preferablely satisfy the following relationship formula :-0.80 < f/>f2 < 0.40.When aforementioned thin type photographing camera lens satisfies the following relationship formula: 0.08 < R3/>R4 < 0.90, can help the higher order aberratons of update the system; Further, preferablely satisfy the following relationship formula: 0.20 < R3/>R4 < 0.60.When aforementioned thin type photographing camera lens satisfies the following relationship formula: 0.20 < CT2/>f < 0.70, can help mouldability and the homogenieity of eyeglass when plastic rubber ejaculate molding, and guarantee that this thin type photographing camera lens has good image quality; Further, preferablely satisfy the following relationship formula: 0.35 < CT2/>f < 0.45.When aforementioned thin type photographing camera lens satisfies the following relationship formula: 0.60 < SL/>TTL < 0.90, can be beneficial to and guarantee that lens combination averages out on heart characteristic far away and wide-angle characteristic, this configuration mode can also effectively reduce the susceptibility of this thin type photographing camera lens in addition.
In the aforementioned thin type photographing camera lens of the present invention; Preferably, the thing side surface of these first lens and be all aspheric surface as side surface, and the material of these first lens is a plastic cement; The thing side surface of these second lens and be all aspheric surface as side surface, and the material of these second lens is a plastic cement.Aspheric surface can be made into the shape beyond the sphere easily, obtains more controlled variable, in order to subduing aberration, and then the number that uses of reduction lens, so can effectively reduce the optics total length of thin type photographing camera lens of the present invention; And the lens material is a plastic cement, not only helps the making of non-spherical lens, more can effectively reduce production costs.
In the aforementioned thin type photographing camera lens of the present invention, the focal length of whole thin type photographing camera lens is f, and the focal length of these first lens is f1, preferably, satisfies the following relationship formula: 1.00 < f/>f1 < 1.80.When f/>f1 satisfies the above-mentioned relation formula; The refracting power size configure of these first lens is balance comparatively; The effective optics total length of control system; Keep the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration (High Order Spherical Aberration) simultaneously, and then promote image quality; Further, preferablely satisfy the following relationship formula: 1.30 < f/>f1 < 1.70.
In the aforementioned thin type photographing camera lens of the present invention, the thickness of these second lens on optical axis is CT2, and the thickness of these first lens on optical axis is CT1, preferably, satisfies the following relationship formula: 2.0 < CT2/>CT1 < 3.0.When CT2/>CT1 satisfies the above-mentioned relation formula, make that the configuration of each lens thickness is balance comparatively in limited camera lens space, and be unlikely to produce too much higher order aberratons.
In the aforementioned thin type photographing camera lens of the present invention, the thing side surface radius-of-curvature of these first lens is R1, these first lens be R2 as the side surface radius-of-curvature, preferably, satisfy the following relationship formula: 0.20 < R1/>R2 < 0.50.When R1/>R2 satisfied the above-mentioned relation formula, the refracting power size configure that can make these first lens is balance comparatively, helps shortening the optics total length of system, and is unlikely to produce too much higher order aberratons.
In the aforementioned thin type photographing camera lens of the present invention, the focal length of these first lens is f1, and the focal length of these second lens is f2, preferably, satisfies the following relationship formula :-0.55 < f1/>f2 < 0.20.When f1/>f2 satisfies the above-mentioned relation formula, can make the refracting power of these first lens and these second lens dispose comparatively balance, can help the correction of aberration and the reduction of susceptibility.
In the aforementioned thin type photographing camera lens of the present invention, the abbe number of these first lens is V1, and the abbe number of these second lens is V2, preferably, satisfies the following relationship formula: 25.0 < V1-V2 < 40.0, and V2 < 28.5.When V1, V2 satisfy the above-mentioned relation formula, help the correction of aberration in this thin type photographing camera lens.
In the aforementioned thin type photographing camera lens of the present invention; Other is provided with a sense electronics optical element and supplies the object imaging in this imaging surface place; The distance of the thing side surface of these first lens to this sense electronics optical element on optical axis is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, preferably, satisfies following relationship formula: TTL/ImgH < 2.3.When TTL/>ImgH satisfies the above-mentioned relation formula, help keeping the miniaturization of this thin type photographing camera lens, to be equipped on the frivolous portable electronic product.
On the other hand; The present invention provides a kind of thin type photographing camera lens; By the thing side to comprising in regular turn as side: first lens of the positive refracting power of a tool, its thing side surface are convex surface and are concave surface as side surface, and the thing side surface of these first lens and be all aspheric surface as side surface; Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are convex surface as side surface, and the thing side surface of these second lens and be all aspheric surface as side surface; And an aperture, be arranged between these first lens and this second lens; The lens of tool refracting power are merely two in this thin type photographing camera lens; Wherein the thickness of these second lens on optical axis is CT2; The thickness of these first lens on optical axis is CT1, and the focal length of these first lens is f1, and the focal length of these second lens is f2; These second lens be Bf as the distance of side surface to imaging surface on optical axis; The focal length of whole thin type photographing camera lens is f, and this thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging in this imaging surface place, and the distance of this aperture to this sense electronics optical element on optical axis is SL; The distance of the thing side surface of these first lens to this sense electronics optical element on optical axis is TTL, satisfies the following relationship formula: 1.4 < CT2/>CT1 < 4.0;-0.60 < f1/>f2 < 0.06; 0.10 < Bf/>f < 0.55; 0.60 < SL/>TTL < 0.90.
When aforementioned thin type photographing camera lens satisfies the following relationship formula: 1.4 < CT2/>CT1 < 4.0, make that the configuration of each lens thickness is balance comparatively in limited camera lens space, and be unlikely to produce too much higher order aberratons; Further, preferablely satisfy the following relationship formula: 2.0 < CT2/>CT1 < 3.0.When aforementioned thin type photographing camera lens satisfies the following relationship formula :-0.60 < f1/>f2 < 0.06, can make the refracting power of these first lens and these second lens dispose comparatively balance, can help the correction of aberration and the reduction of susceptibility; Further, preferablely satisfy the following relationship formula :-0.55 < f1/>f2 < 0.20.When aforementioned thin type photographing camera lens satisfies the following relationship formula: 0.10 < Bf/>f < 0.55, can guarantee that this thin type photographing camera lens has enough back focal length can place other member.When aforementioned thin type photographing camera lens satisfies the following relationship formula: 0.60 < SL/>TTL < 0.90, can be beneficial to and guarantee that lens combination averages out on heart characteristic far away and wide-angle characteristic, this configuration mode can also effectively reduce the susceptibility of this thin type photographing camera lens in addition.
In the aforementioned thin type photographing camera lens of the present invention, the focal length of whole thin type photographing camera lens is f, and the focal length of these first lens is f1, preferably, satisfies the following relationship formula: 1.30 < f/>f1 < 1.70.When f/>f1 satisfied the above-mentioned relation formula, the refracting power size configure of these first lens is balance comparatively, and effectively the optics total length of control system is kept the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration simultaneously, and then promoted image quality.
In the aforementioned thin type photographing camera lens of the present invention, the thing side surface radius-of-curvature of these first lens is R1, these first lens be R2 as the side surface radius-of-curvature, preferably, satisfy the following relationship formula: 0.20 < R1/>R2 < 0.50.When R1/>R2 satisfied the above-mentioned relation formula, the refracting power size configure that can make these first lens is balance comparatively, helps shortening the optics total length of system, and is unlikely to produce too much higher order aberratons.
In the aforementioned thin type photographing camera lens of the present invention, the abbe number of these first lens is V1, and the abbe number of these second lens is V2, preferably, satisfies the following relationship formula: 25.0 < V1-V2 < 40.0, and V2 < 28.5.When V1, V2 satisfy the above-mentioned relation formula, help the correction of aberration in this thin type photographing camera lens.
In the aforementioned thin type photographing camera lens of the present invention, the thing side surface radius-of-curvature of these second lens is R3, these second lens be R4 as the side surface radius-of-curvature, preferably, satisfy the following relationship formula: 0.20 < R3/>R4 < 0.60.When R3/>R4 satisfies the above-mentioned relation formula, can help the higher order aberratons of update the system.
Again on the other hand; The present invention provides a kind of thin type photographing camera lens; By the thing side to comprising in regular turn as side: first lens of the positive refracting power of a tool, its thing side surface are convex surface and are concave surface as side surface, and the thing side surface of these first lens be aspheric surface as at least one surface in the side surface; Second lens of the negative refracting power of one tool, it is crescent lens, and the thing side surface of these second lens be aspheric surface as at least one surface in the side surface; And an aperture, be arranged between these first lens and this second lens; The lens of tool refracting power are merely two in this thin type photographing camera lens; Wherein the abbe number of these first lens is V1; The abbe number of these second lens is V2, and the focal length of whole thin type photographing camera lens is f, and the focal length of these second lens is f2; This thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging in the imaging surface place; The distance of this aperture to this sense electronics optical element on optical axis is SL, and the distance of the thing side surface of these first lens to this sense electronics optical element on optical axis is TTL, satisfies the following relationship formula: 25.0 < V1-V2 < 40.0; V2 < 28.5;-1.20 < f/>f2 < 0.10; 0.60 < SL/>TTL < 0.90.
When aforementioned thin type photographing camera lens satisfies the following relationship formula: 25.0 < V1-V2 < 40.0 and V2 28.5, help the correction of aberration in this thin type photographing camera lens.When aforementioned thin type photographing camera lens satisfies the following relationship formula :-1.20 < f/>f2 < 0.10; More help the correction of aberration in this thin type photographing camera lens; And the refracting power of these second lens disposes comparatively balance; Help to reduce the susceptibility of system, further, preferablely satisfy the following relationship formula :-0.85 < f/>f2 < 0.30.When aforementioned thin type photographing camera lens satisfies the following relationship formula: 0.60 < SL/>TTL < 0.90, can be beneficial to and guarantee that lens combination averages out on heart characteristic far away and wide-angle characteristic, this configuration mode can also effectively reduce the susceptibility of this thin type photographing camera lens in addition.
In the aforementioned thin type photographing camera lens of the present invention, preferably, the thing side surface of these second lens is concave surface and is convex surface as side surface that effectively the compact system marginal ray is incident in the angle on this photo-sensitive cell, improves the luminous sensitivity of system.
In the aforementioned thin type photographing camera lens of the present invention, the focal length of whole thin type photographing camera lens is f, and the focal length of these first lens is f1, and the thickness of these second lens on optical axis is CT2, preferably, satisfies the following relationship formula: 1.00 < f/>f1 < 1.80; 0.35 < CT2/>f < 0.45.When f/>f1 satisfied the above-mentioned relation formula, the refracting power size configure of these first lens is balance comparatively, and effectively the optics total length of control system is kept the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration simultaneously, and then promoted image quality; When CT2/f satisfies the above-mentioned relation formula, can help mouldability and the homogenieity of eyeglass when plastic rubber ejaculate molding, and guarantee that this thin type photographing camera lens has good image quality.
In the aforementioned thin type photographing camera lens of the present invention, these second lens be Bf as the distance of side surface to this imaging surface on optical axis, the focal length of whole thin type photographing camera lens is f, preferably, satisfies the following relationship formula: 0.10 < Bf/>f < 0.55.When Bf/>f satisfies the above-mentioned relation formula, can guarantee that this thin type photographing camera lens has enough back focal length can place other member.
In the thin type photographing camera lens of the present invention, the material of lens can be glass or plastic cement, if the material of lens is a glass, then can increase the degree of freedom of system's refracting power configuration, if the lens material is a plastic cement, then can effectively reduce production costs.In addition, and aspheric surface can be set on minute surface, aspheric surface can be made into the shape beyond the sphere easily; Obtain more controlled variable; In order to subduing aberration, and then the number that uses of reduction lens, therefore can effectively reduce the optics total length of thin type photographing camera lens of the present invention.
In the thin type photographing camera lens of the present invention, if lens surface system representes then that for convex surface this lens surface is a convex surface in paraxial place; If lens surface system representes then that for concave surface this lens surface is a concave surface in paraxial place.
Thin type photographing camera lens of the present invention will specify by following specific embodiment conjunction with figs..
" first embodiment "
First embodiment of the invention sees also Figure 1A, and the aberration curve of first embodiment sees also Figure 1B.The thin type photographing camera lens of first embodiment mainly is made up of two pieces of lens, is extremely comprised in regular turn as side by the thing side:
One aperture 120 places between these first lens 100 and this second lens 110;
Other includes an infrared ray filtering optical filter (IR-filter) 130 and places looking like between a side surface 112 and the imaging surface 140 of these second lens 110; The material of this infrared ray filtering optical filter 130 is that glass and its do not influence the focal length of this thin type photographing camera lens of the present invention.
The equation of above-mentioned aspheric curve is represented as follows:
Wherein:
X: be the point of Y apart from optical axis on the aspheric surface, itself and the relative height that is tangential on the tangent plane on summit on the aspheric surface optical axis;
Y: the point on the aspheric curve and the distance of optical axis;
K: conical surface coefficient;
Ai: i rank asphericity coefficient.
In the first embodiment thin type photographing camera lens, the focal length of whole thin type photographing camera lens is f, and its relational expression is: f=2.91 (millimeter).
In the first embodiment thin type photographing camera lens, the f-number of whole thin type photographing camera lens (f-number) is Fno, and its relational expression is: Fno=2.80.
In the first embodiment thin type photographing camera lens, the half the of maximum visual angle is HFOV in the whole thin type photographing camera lens, and its relational expression is: HFOV=26.5 (degree).
In the first embodiment thin type photographing camera lens, the focal length of whole thin type photographing camera lens is f, and the focal length of these second lens 110 is f2, and its relational expression is: f/f2=-0.51.
In the first embodiment thin type photographing camera lens, the thing side surface radius-of-curvature of these second lens 110 is R3, these second lens 110 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=0.47.
In the first embodiment thin type photographing camera lens, the thickness of these second lens 110 on optical axis is CT2, and the focal length of whole thin type photographing camera lens is f, and its relational expression is: CT2/f=0.41.
In the first embodiment thin type photographing camera lens; This thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 140 places; The distance of this aperture 120 to this sense electronics optical element on optical axis is SL; The distance of the thing side surface 101 of these first lens 100 to this sense electronics optical element on optical axis is TTL, and its relational expression is: SL/TTL=0.75.
In the first embodiment thin type photographing camera lens, the focal length of whole thin type photographing camera lens is f, and the focal length of these first lens 100 is f1, and its relational expression is: f/f1=1.51.
In the first embodiment thin type photographing camera lens, the thickness of these second lens 110 on optical axis is CT2, and the thickness of these first lens 100 on optical axis is CT1, and its relational expression is: CT2/CT1=1.72.
In the first embodiment thin type photographing camera lens, the thing side surface radius-of-curvature of these first lens 100 is R1, these first lens 100 be R2 as the side surface radius-of-curvature, its relational expression is: R1/R2=0.35.
In the first embodiment thin type photographing camera lens, the focal length of these first lens 100 is f1, and the focal length of these second lens 110 is f2, and its relational expression is: f1/f2=-0.34.
In the first embodiment thin type photographing camera lens, the abbe number of these first lens 100 is V1, and the abbe number of these second lens 110 is V2, and its relational expression is: V2=23.4; V1-V2=32.5.
In the first embodiment thin type photographing camera lens; This thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 140 places; The distance of the thing side surface 101 of these first lens 100 to this sense electronics optical element on optical axis is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=2.16.
In the first embodiment thin type photographing camera lens, these second lens 110 be Bf as the distance of side surface 112 to this imaging surface 140 on optical axis, the focal length of whole thin type photographing camera lens is f, its relational expression is: Bf/f=0.27.
The detailed optical data of first embodiment is shown in Fig. 4 table one, and its aspherical surface data is shown in Fig. 5 table two, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
" second embodiment "
Second embodiment of the invention sees also Fig. 2 A, and the aberration curve of second embodiment sees also Fig. 2 B.The thin type photographing camera lens of second embodiment mainly is made up of two pieces of lens, is extremely comprised in regular turn as side by the thing side:
One aperture 220 places between these first lens 200 and this second lens 210;
Other includes an infrared ray filtering optical filter 230 and places placing between this infrared ray filtering optical filter 230 and this imaging surface 250 as reaching a cover glass (Cover-glass) 240 between a side surface 212 and the imaging surface 250 of these second lens 210; The material of this infrared ray filtering optical filter 230 and this cover glass 240 is that glass and its do not influence the focal length of this thin type photographing camera lens of the present invention.
The equational expression of the second embodiment aspheric curve is as the pattern of first embodiment.
In the second embodiment thin type photographing camera lens, the focal length of whole thin type photographing camera lens is f, and its relational expression is: f=3.02 (millimeter).
In the second embodiment thin type photographing camera lens, the f-number of whole thin type photographing camera lens is Fno, and its relational expression is: Fno=2.90.
In the second embodiment thin type photographing camera lens, the half the of maximum visual angle is HFOV in the whole thin type photographing camera lens, and its relational expression is: HFOV=30.0 (degree).
In the second embodiment thin type photographing camera lens, the focal length of whole thin type photographing camera lens is f, and the focal length of these second lens 210 is f2, and its relational expression is: f/f2=-0.74.
In the second embodiment thin type photographing camera lens, the thing side surface radius-of-curvature of these second lens 210 is R3, these second lens 210 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=0.25.
In the second embodiment thin type photographing camera lens, the thickness of these second lens 210 on optical axis is CT2, and the focal length of whole thin type photographing camera lens is f, and its relational expression is: CT2/f=0.43.
In the second embodiment thin type photographing camera lens; This thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 250 places; The distance of this aperture 220 to this sense electronics optical element on optical axis is SL; The distance of the thing side surface 201 of these first lens 200 to this sense electronics optical element on optical axis is TTL, and its relational expression is: SL/TTL=0.81.
In the second embodiment thin type photographing camera lens, the focal length of whole thin type photographing camera lens is f, and the focal length of these first lens 200 is f1, and its relational expression is: f/f1=1.49.
In the second embodiment thin type photographing camera lens, the thickness of these second lens 210 on optical axis is CT2, and the thickness of these first lens 200 on optical axis is CT1, and its relational expression is: CT2/CT1=2.42.
In the second embodiment thin type photographing camera lens, the thing side surface radius-of-curvature of these first lens 200 is R1, these first lens 200 be R2 as the side surface radius-of-curvature, its relational expression is: R1/R2=0.32.
In the second embodiment thin type photographing camera lens, the focal length of these first lens 200 is f1, and the focal length of these second lens 210 is f2, and its relational expression is: f1/f2=-0.49.
In the second embodiment thin type photographing camera lens, the abbe number of these first lens 200 is V1, and the abbe number of these second lens 210 is V2, and its relational expression is: V2=23.4; V1-V2=32.5.
In the second embodiment thin type photographing camera lens; This thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 250 places; The distance of the thing side surface 201 of these first lens 200 to this sense electronics optical element on optical axis is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.81.
In the second embodiment thin type photographing camera lens, these second lens 210 be Bf as the distance of side surface 212 to this imaging surface 250 on optical axis, the focal length of whole thin type photographing camera lens is f, its relational expression is: Bf/f=0.25.
The detailed optical data of second embodiment is shown in Fig. 6 table three, and its aspherical surface data is shown in Fig. 7 table four, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
" the 3rd embodiment "
Third embodiment of the invention sees also Fig. 3 A, and the aberration curve of the 3rd embodiment sees also Fig. 3 B.The thin type photographing camera lens of the 3rd embodiment mainly is made up of two pieces of lens, is extremely comprised in regular turn as side by the thing side:
One aperture 320 places between these first lens 300 and this second lens 310;
Other includes an infrared ray filtering optical filter 330 and places looking like between a side surface 312 and the imaging surface 340 of these second lens 310; The material of this infrared ray filtering optical filter 330 is that glass and its do not influence the focal length of this thin type photographing camera lens of the present invention.
The equational expression of the 3rd embodiment aspheric curve is as the pattern of first embodiment.
In the 3rd embodiment thin type photographing camera lens, the focal length of whole thin type photographing camera lens is f, and its relational expression is: f=4.22 (millimeter).
In the 3rd embodiment thin type photographing camera lens, the f-number of whole thin type photographing camera lens is Fno, and its relational expression is: Fno=3.00.
In the 3rd embodiment thin type photographing camera lens, the half the of maximum visual angle is HFOV in the whole thin type photographing camera lens, and its relational expression is: HFOV=27.6 (degree).
In the 3rd embodiment thin type photographing camera lens, the focal length of whole thin type photographing camera lens is f, and the focal length of these second lens 310 is f2, and its relational expression is: f/f2=-0.15.
In the 3rd embodiment thin type photographing camera lens, the thing side surface radius-of-curvature of these second lens 310 is R3, these second lens 310 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=0.44.
In the 3rd embodiment thin type photographing camera lens, the thickness of these second lens 310 on optical axis is CT2, and the focal length of whole thin type photographing camera lens is f, and its relational expression is: CT2/f=0.42.
In the 3rd embodiment thin type photographing camera lens; This thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 340 places; The distance of this aperture 320 to this sense electronics optical element on optical axis is SL; The distance of the thing side surface 301 of these first lens 300 to this sense electronics optical element on optical axis is TTL, and its relational expression is: SL/TTL=0.85.
In the 3rd embodiment thin type photographing camera lens, the focal length of whole thin type photographing camera lens is f, and the focal length of these first lens 300 is f1, and its relational expression is: f/f1=1.15.
In the 3rd embodiment thin type photographing camera lens, the thickness of these second lens 310 on optical axis is CT2, and the thickness of these first lens 300 on optical axis is CT1, and its relational expression is: CT2/CT1=3.00.
In the 3rd embodiment thin type photographing camera lens, the thing side surface radius-of-curvature of these first lens 300 is R1, these first lens 300 be R2 as the side surface radius-of-curvature, its relational expression is: R1/R2=0.46.
In the 3rd embodiment thin type photographing camera lens, the focal length of these first lens 300 is f1, and the focal length of these second lens 310 is f2, and its relational expression is: f1/f2=-0.13.
In the 3rd embodiment thin type photographing camera lens, the abbe number of these first lens 300 is V1, and the abbe number of these second lens 310 is V2, and its relational expression is: V2=55.8, V1-V2=0.7.
In the 3rd embodiment thin type photographing camera lens; This thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging on it in these imaging surface 340 places; The distance of the thing side surface 301 of these first lens 300 to this sense electronics optical element on optical axis is TTL; And the half the of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=2.07.
In the 3rd embodiment thin type photographing camera lens, these second lens 310 be Bf as the distance of side surface 312 to this imaging surface 340 on optical axis, the focal length of whole thin type photographing camera lens is f, its relational expression is: Bf/f=0.34.
The detailed optical data of the 3rd embodiment is shown in Fig. 8 table five, and its aspherical surface data is shown in Fig. 9 table six, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
Table one to table six (corresponding diagram 4 is to Fig. 9 respectively) is depicted as the different numerical value change tables of thin type photographing camera lens embodiment of the present invention; The all true gained of testing of numerical value change of right each embodiment of the present invention; Even use different numerical value; The product of same structure must belong to protection category of the present invention, so above explanation is described and be graphic only as exemplary, non-in order to limit claim scope of the present invention.Table seven (corresponding Figure 10) is the numeric data of the corresponding correlationship formula of the present invention of each embodiment.
Claims (23)
1. a thin type photographing camera lens is characterized in that, said thin type photographing camera lens is extremely comprised as side by the thing side in regular turn:
First lens of the positive refracting power of one tool, its thing side surface are convex surface and are concave surface as side surface, and the thing side surface of said first lens be aspheric surface as at least one surface in the side surface;
Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are convex surface as side surface, and the thing side surface of said second lens be aspheric surface as at least one surface in the side surface; And
One aperture is arranged between said first lens and said second lens;
The lens of tool refracting power are merely two in the said thin type photographing camera lens;
The focal length of wherein whole thin type photographing camera lens is f; The focal length of said first lens is f1, and the focal length of said second lens is f2, and the thing side surface radius-of-curvature of said second lens is R3; Said second lens be R4 as the side surface radius-of-curvature; The thickness of said second lens on optical axis is CT2, and said thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging in the imaging surface place, and said aperture to the distance of said sense electronics optical element on optical axis is SL; The thing side surface of said first lens to the distance of said sense electronics optical element on optical axis is TTL, satisfies the following relationship formula:
-1.20
<f/>f2<-0.10；
-0.34≦f1/f2<-0.06；
0.08
<R3/>R4<0.90；
0.20
<CT2/>f<0.70；
0.60
<SL/>TTL<0.90。
2. thin type photographing camera lens as claimed in claim 1; It is characterized in that; The thing side surface of said first lens and be all aspheric surface as side surface; And the material of said first lens is a plastic cement, the thing side surface of said second lens and be all aspheric surface as side surface, and the material of said second lens is a plastic cement.
3. thin type photographing camera lens as claimed in claim 1 is characterized in that, the focal length of whole thin type photographing camera lens is f, and the focal length of said first lens is f1, satisfies the following relationship formula:
1.00
<f/>f1<1.80。
4. thin type photographing camera lens as claimed in claim 3 is characterized in that, the focal length of whole thin type photographing camera lens is f, and the focal length of said first lens is f1, satisfies the following relationship formula:
1.30
<f/>f1<1.70。
5. thin type photographing camera lens as claimed in claim 2 is characterized in that, the focal length of whole thin type photographing camera lens is f, and the focal length of said second lens is f2, satisfies the following relationship formula:
-0.80
<f/>f2<-0.40。
6. thin type photographing camera lens as claimed in claim 3 is characterized in that, the thickness of said second lens on optical axis is CT2, and the thickness of said first lens on optical axis is CT1, satisfies the following relationship formula:
2.0
<CT2/>CT1<3.0。
7. thin type photographing camera lens as claimed in claim 5 is characterized in that, the thickness of said second lens on optical axis is CT2, and the focal length of whole thin type photographing camera lens is f, satisfies the following relationship formula:
0.35
<CT2/>f<0.45。
8. thin type photographing camera lens as claimed in claim 2 is characterized in that, the thing side surface radius-of-curvature of said first lens is R1, said first lens be R2 as the side surface radius-of-curvature, satisfy the following relationship formula:
0.20
<R1/>R2<0.50。
9. thin type photographing camera lens as claimed in claim 2 is characterized in that, the thing side surface radius-of-curvature of said second lens is R3, said second lens be R4 as the side surface radius-of-curvature, satisfy the following relationship formula:
0.20
<R3/>R4<0.60。
10. thin type photographing camera lens as claimed in claim 2 is characterized in that, the focal length of said first lens is f1, and the focal length of said second lens is f2, satisfies the following relationship formula:
-0.34≦f1/f2<-0.20。
11. thin type photographing camera lens as claimed in claim 10 is characterized in that, the abbe number of said first lens is V1, and the abbe number of said second lens is V2, satisfies the following relationship formula:
25.0<V1-V2<40.0，V2<28.5。
12. thin type photographing camera lens as claimed in claim 1; It is characterized in that; Said thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging in said imaging surface place; The thing side surface of said first lens to the distance of said sense electronics optical element on optical axis is TTL, and the half the of said sense electronics optical element effective pixel area diagonal angle line length is ImgH, satisfies the following relationship formula:
TTL/ImgH<2.3。
13. a thin type photographing camera lens is characterized in that, said thin type photographing camera lens is extremely comprised as side by the thing side in regular turn:
First lens of the positive refracting power of one tool, its thing side surface are convex surface and are concave surface as side surface, and the thing side surface of said first lens and be all aspheric surface as side surface;
Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are convex surface as side surface, and the thing side surface of said second lens and be all aspheric surface as side surface; And
One aperture is arranged between said first lens and said second lens;
The lens of tool refracting power are merely two in the said thin type photographing camera lens;
The thickness of wherein said second lens on optical axis is CT2; The thickness of said first lens on optical axis is CT1, and the focal length of said first lens is f1, and the focal length of said second lens is f2; Said second lens be Bf as the distance of side surface to imaging surface on optical axis; The focal length of whole thin type photographing camera lens is f, and said thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging in said imaging surface place, and said aperture to the distance of said sense electronics optical element on optical axis is SL; The thing side surface of said first lens to the distance of said sense electronics optical element on optical axis is TTL, satisfies the following relationship formula:
1.4
<CT2/>CT1<4.0；
-0.34≦f1/f2<-0.06；
0.10
<Bf/>f<0.55；
0.60
<SL/>TTL<0.90。
14. thin type photographing camera lens as claimed in claim 13 is characterized in that, the focal length of whole thin type photographing camera lens is f, and the focal length of said first lens is f1, satisfies the following relationship formula:
1.30
<f/>f1<1.70。
15. thin type photographing camera lens as claimed in claim 14 is characterized in that, the focal length of said first lens is f1, and the focal length of said second lens is f2, satisfies the following relationship formula:
-0.34≦f1/f2<-0.20。
16. thin type photographing camera lens as claimed in claim 15 is characterized in that, the thing side surface radius-of-curvature of said first lens is R1, said first lens be R2 as the side surface radius-of-curvature, satisfy the following relationship formula:
0.20
<R1/>R2<0.50。
17. thin type photographing camera lens as claimed in claim 14 is characterized in that, the thickness of said second lens on optical axis is CT2, and the thickness of said first lens on optical axis is CT1, satisfies the following relationship formula:
2.0
<CT2/>CT1<3.0。
18. thin type photographing camera lens as claimed in claim 13 is characterized in that, the abbe number of said first lens is V1, and the abbe number of said second lens is V2, satisfies the following relationship formula:
25.0<V1-V2<40.0，V2<28.5。
19. thin type photographing camera lens as claimed in claim 15 is characterized in that, the thing side surface radius-of-curvature of said second lens is R3, said second lens be R4 as the side surface radius-of-curvature, satisfy the following relationship formula:
0.20
<R3/>R4<0.60。
20. a thin type photographing camera lens is characterized in that, is extremely comprised in regular turn as side by the thing side:
First lens of the positive refracting power of one tool, its thing side surface are convex surface and are concave surface as side surface, and the thing side surface of said first lens be aspheric surface as at least one surface in the side surface;
Second lens of the negative refracting power of one tool, it is crescent lens, and the thing side surface of said second lens be aspheric surface as at least one surface in the side surface; And
One aperture is arranged between said first lens and said second lens;
The lens of tool refracting power are merely two in the said thin type photographing camera lens;
The abbe number of wherein said first lens is V1; The abbe number of said second lens is V2; The focal length of whole thin type photographing camera lens is f, and the focal length of said first lens is f1, and the focal length of said second lens is f2; Said thin type photographing camera lens is provided with a sense electronics optical element in addition and supplies the object imaging in the imaging surface place; Said aperture to the distance of said sense electronics optical element on optical axis is SL, and the thing side surface of said first lens to the distance of said sense electronics optical element on optical axis is TTL, satisfies the following relationship formula:
25.0<V1-V2<40.0，V2<28.5；
-1.20
<f/>f2<-0.10；
-0.34≦f1/f2<-0.06；
0.60
<SL/>TTL<0.90。
21. thin type photographing camera lens as claimed in claim 20 is characterized in that, the thing side surface of said second lens is concave surface and is convex surface as side surface.
22. thin type photographing camera lens as claimed in claim 21 is characterized in that, the focal length of whole thin type photographing camera lens is f, and the focal length of said first lens is f1, and the thickness of said second lens on optical axis is CT2, satisfies the following relationship formula:
1.00
<f/>f1<1.80；
0.35
<CT2/>f<0.45。
23. thin type photographing camera lens as claimed in claim 21; It is characterized in that the focal length of whole thin type photographing camera lens is f, the focal length of said second lens is f2; Said second lens as side surface to the distance of said imaging surface on optical axis be Bf, satisfy the following relationship formula:
-0.85
<f/>f2<-0.30；
0.10
<Bf/>f<0.55。
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5677798A (en) * | 1993-10-28 | 1997-10-14 | Asahi Kogaku Kogyo Kabushiki Kaisha | Image forming lens system |
| US7525741B1 (en) * | 2007-10-07 | 2009-04-28 | Largan Precision Co., Ltd. | Two-piece optical lens system for taking image |
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| TWI315417B (en) * | 2006-10-30 | 2009-10-01 | Largan Precision Co Ltd | Optical system for taking image |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5677798A (en) * | 1993-10-28 | 1997-10-14 | Asahi Kogaku Kogyo Kabushiki Kaisha | Image forming lens system |
| US7525741B1 (en) * | 2007-10-07 | 2009-04-28 | Largan Precision Co., Ltd. | Two-piece optical lens system for taking image |
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