CN116482844B - High-resolution large-target-area-surface-area-magnetic-fiber telecentric lens - Google Patents
High-resolution large-target-area-surface-area-magnetic-fiber telecentric lens Download PDFInfo
- Publication number
- CN116482844B CN116482844B CN202310080437.XA CN202310080437A CN116482844B CN 116482844 B CN116482844 B CN 116482844B CN 202310080437 A CN202310080437 A CN 202310080437A CN 116482844 B CN116482844 B CN 116482844B
- Authority
- CN
- China
- Prior art keywords
- lens
- optical axis
- axis direction
- curvature
- telecentric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000835 fiber Substances 0.000 title description 3
- 230000003287 optical effect Effects 0.000 claims abstract description 65
- 230000000694 effects Effects 0.000 abstract description 19
- 238000003384 imaging method Methods 0.000 abstract description 17
- RVGRUAULSDPKGF-UHFFFAOYSA-N Poloxamer Chemical compound C1CO1.CC1CO1 RVGRUAULSDPKGF-UHFFFAOYSA-N 0.000 abstract description 6
- 229960000502 poloxamer Drugs 0.000 abstract description 6
- 229920001983 poloxamer Polymers 0.000 abstract description 6
- 239000006185 dispersion Substances 0.000 description 21
- 230000004075 alteration Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 11
- 239000011521 glass Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/22—Telecentric objectives or lens systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention is suitable for the technical field of optical systems, and provides a high-resolution large-target-area poloxamer telecentric lens, which comprises: the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens are coaxially arranged in sequence from the object plane to the image plane; a diaphragm is arranged between the fourth lens and the fifth lens, the angle between the object plane and the optical axis of the lens can be adjusted at will from 45 degrees to 90 degrees, and the angle between the image plane and the optical axis of the lens is correspondingly adjusted according to the angle between the object plane and the optical axis of the lens; the invention can realize clear imaging of the object from 0 degree to 45 degrees and perfect display from the plane to the 3D effect; wherein the diaphragm is arranged at the position where the focuses of the front group and the rear group lens coincide, thereby realizing the double telecentric function of the lens.
Description
Technical Field
The invention belongs to the technical field of optical systems, and particularly relates to a high-resolution large-target-area poloxamer telecentric lens.
Background
Along with the increasing precision of the detection equipment and the increasing improvement of the image processing speed, the requirements of the fields of the driving circuit board, the thin film capacitor and the like of the detection LED are increasing, the detection equipment is required to be high in precision, small in size, low in cost and the like, and the requirements on the lens are also increasing. The lens on the market at present cannot meet special use requirements of part of users, for example, plane effects and 3D effects are required to be displayed simultaneously, and based on the special use requirements of customers can be met, and cost can be reduced to make up for the gap in the prior art by the high-resolution large-target-area-surface-magnetic-fiber telecentric lens.
Disclosure of Invention
The embodiment of the invention aims to provide a high-resolution large-target-area telecentric lens of a poloxamer, the telecentric lens solves the problem that the existing telecentric lens can only shoot an object with a plane object space or an inclined object with a 45-degree object space, and cannot display a plane effect and a 3D effect at the same time.
The embodiment of the invention is realized in such a way that a high-resolution large-target-area-surface-magnetic-element telecentric lens comprises: the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens are coaxially arranged in sequence from the object plane to the image plane; a diaphragm is arranged between the fourth lens and the fifth lens, the angle between the object plane and the optical axis of the lens can be adjusted randomly from 45 degrees to 90 degrees, the angle between the image plane and the optical axis of the lens is adjusted correspondingly according to the angle between the object plane and the optical axis of the lens, namely, the angle between the object plane and the lens can be adjusted randomly from 0 degrees to 45 degrees, the angle between the image plane and the lens is adjusted correspondingly according to the angle of the object plane, so that the object can be imaged clearly from 0 degrees to 45 degrees, and the perfect display of the 3D effect from the plane is realized; meanwhile, the aberration balance in the whole adjusting process is ensured;
the lens satisfies the following conditions:
PMAG=0.295，F.NO = 6，EFFL=2850mm，TTL=215mm；
wherein PMAG is the magnification of the lens, F.NO is the relative aperture of the lens, EFFL is the effective focal length of the lens, and TTL is the optical total length of the lens;
the first lens is a biconvex positive lens, the second lens is a biconvex positive lens, the third lens is a biconcave negative lens, the fourth lens is a biconcave positive lens, the fifth lens is a concave-convex positive lens, the sixth lens is a biconcave negative lens, the seventh lens is a concave-convex negative lens, the eighth lens is a concave-convex positive lens, and the ninth lens is a concave-convex positive lens.
Further, the focal lengths of the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth lenses satisfy the following conditions:
f/f1=19.56，f1=145.8mm；
f/f2=36.741，f2=77.624mm；
f/f3=-50.894，f3=-56.038mm；
f/f4=32.351，f4=88.158mm；
f/f5=128.991，f5=22.11mm；
f/f6=-298.638，f6=-9.55mm；
f/f7=-67.0899，f7=-42.51mm；
f/f8=92.193，f8=30.935mm；
f/f9=94.9113，f9=30.049mm；
wherein f is the effective focal length of the lens, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, f8 is the focal length of the eighth lens, and f9 is the focal length of the ninth lens;
the materials of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens meet the following conditions:
a first lens: 1.60< Nd <1.80, 40< Vd <62;
a second lens: 1.45< Nd <1.75, 45< Vd <90;
a third lens: 1.65< Nd <1.85, 23< Vd <55;
fourth lens: 1.70< Nd <2.0, 17< vd <55;
a fifth lens: 1.45< Nd <1.75, 45< Vd <82;
a sixth lens: 1.60< Nd <1.80, 25< Vd <62;
seventh lens: 1.70< Nd <1.95, 18< Vd <55;
eighth lens: 1.50< Nd <1.75, 30< Vd <62;
a ninth lens: 1.62< Nd <1.85, 20< Vd <62;
where Nd is the refractive index and Vd is the dispersion coefficient.
Further, the first lens is a biconvex positive lens, the dispersion coefficient Vd of the first lens is 40< Vd <62, the refractive index Nd is 1.60< Nd <1.80, the curvature radiuses of the front surface and the rear surface of the first lens are R11 and R12 respectively, the core thickness of the first lens along the optical axis direction is d1, wherein 100mm < R11<1000mm, -500mm < R12< -100mm, and 2< d1<12mm.
Further, the second lens is a biconvex positive lens, the dispersion coefficient Vd of which is 45< Vd <90, the refractive index Nd of which is 1.45< Nd <1.75, the radius of curvature of the front and rear surfaces of the second lens are R21 and R22 respectively, the core thickness of the second lens in the optical axis direction is d3, wherein 60mm < R21<150mm, -300mm < R22< -55mm,3< d3<20mm;
the third lens is a negative lens with double negative concave shapes, the dispersion coefficient Vd of the negative lens is 23< Vd <55, the refractive index Nd of the negative lens is 1.65< Nd <1.85, the curvature radiuses of the front surface and the rear surface of the third lens are R31 and R32 respectively, the core thickness of the third lens along the optical axis direction is d4, wherein-100 mm < R31< -50mm,50mm < R32<200mm, and 0.7< d4<5mm.
Further, the fourth lens is a convex-concave positive lens, the dispersion coefficient Vd is 17< Vd <55, the refractive index Nd is 1.70< Nd <2.0, the curvature radiuses of the front and rear surfaces of the fourth lens are R41 and R42, respectively, the core thickness along the optical axis direction is d6, wherein 45mm < R41<150mm,60mm < R42<500mm, and 1.5< d6<8mm.
Further, the fifth lens is a concave-convex positive lens, the dispersion coefficient Vd of the fifth lens is 45< Vd <82, the refractive index Nd of the fifth lens is 1.45< Nd <1.75, the curvature radiuses of the front surface and the rear surface of the fifth lens are R61 and R62 respectively, the core thickness of the fifth lens along the optical axis direction is d9, wherein-100 mm < R61< -40mm, -50mm < R62< -10mm, and 1mm < d9<8mm.
Further, the sixth lens is a biconcave negative lens, the dispersion coefficient Vd thereof is 25< Vd <62, the refractive index coefficient is 1.60< nd <1.80, the radius of curvature of the front and rear surfaces of the sixth lens is R71 and R72, respectively, the core thickness thereof in the optical axis direction is d11, wherein-30 mm < r71< -5mm,10mm < r72<70mm,1mm < d11<7.5mm.
Further, the seventh lens is a concave-convex negative lens, the dispersion coefficient Vd of which is 18< Vd <55, the refractive index Nd of which is 1.70< Nd <1.95, the radius of curvature of the front and rear surfaces of the seventh lens is divided into R81 and R82, the core thickness thereof in the optical axis direction is d12, wherein-100 mm < R81< -25mm, -300mm < R82< -80mm,0.7mm < d12<7mm;
the eighth lens is a concave-convex positive lens, the dispersion coefficient Vd of the positive lens is 30< Vd <62, the refractive index Nd is 1.50< Nd <1.75, the curvature radius of the front surface and the rear surface of the eighth lens is divided into R91 and R92, the core thickness of the eighth lens along the optical axis direction is d13, wherein-500 mm < R91< -50mm, -50mm < R92< -10mm,2mm < d13<7mm.
Further, the ninth lens is a concave-convex positive lens, the dispersion coefficient Vd of which is 20< Vd <62, the refractive index Nd is 1.62< Nd <1.85, the radius of curvature of the front and rear surfaces of the ninth lens is divided into R101 and R102, the core thickness along the optical axis direction of the ninth lens is d15, wherein-500 mm < R101< -50mm, -50mm < R102< -10mm,2mm < d15<7mm.
Further, the second lens and the third lens form a first group of bonding lenses, the seventh lens and the eighth lens form a second group of bonding lenses, and the first group of bonding lenses and the second group of bonding lenses are achromatic bonding lenses.
For the high resolution large target telecentric lens presented in the above embodiments, compared to the prior art, the three-dimensional optical fiber has the advantages of large target surface, high resolution, telecentric design of the poloxamer and the like, and can meet the requirement of simultaneously displaying the planar effect and the 3D effect; the third lens and the seventh lens are made of high-refractive-index glass, and the second lens is made of low-dispersion-coefficient glass, so that aberration in the lens is effectively reduced, the structure is simple, the manufacturing is convenient, and the imaging effect is improved.
Drawings
Fig. 1 is a schematic structural diagram of a high-resolution large-target-area telecentric lens according to an embodiment of the invention.
Fig. 2 is a schematic cross-sectional view of a first lens in an embodiment of the invention.
Fig. 3 is a schematic cross-sectional view of a second lens in an embodiment of the invention.
Fig. 4 is a schematic cross-sectional view of a third lens in an embodiment of the invention.
Fig. 5 is a schematic cross-sectional view of a fourth lens in an embodiment of the invention.
Fig. 6 is a schematic cross-sectional view of a fifth lens in accordance with an embodiment of the present invention.
FIG. 7 is a schematic cross-sectional view of a sixth lens according to an embodiment of the present invention.
Fig. 8 is a schematic cross-sectional view of a seventh lens according to an embodiment of the present invention.
Fig. 9 is a schematic cross-sectional view of an eighth lens in an embodiment of the invention.
Fig. 10 is a schematic cross-sectional view of a ninth lens in an embodiment of the invention.
Fig. 11 is a schematic MTF diagram of a high-resolution large-target-area telecentric lens according to an embodiment of the invention.
Fig. 12 is an aberration diagram of a high-resolution large-target-area telecentric lens according to an embodiment of the invention.
Fig. 13 is a distortion diagram of a high-resolution large-target-area telecentric lens according to an embodiment of the invention.
Fig. 14 is a point-to-point diagram of a high resolution large target telecentric lens for use with the present invention.
Fig. 15 is a schematic diagram of light propagation of a high-resolution large-target telecentric lens according to an embodiment of the invention.
In the accompanying drawings: 1-first lens, 2-second lens, 3-third lens, 4-fourth lens, 5-diaphragm, 6-fifth lens, 7-sixth lens, 8-seventh lens, 9-eighth lens, 10-ninth lens, 11-image plane, and OBJ-object plane.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
Fig. 1 is a schematic structural diagram of a high-resolution large-target-area telecentric lens according to an embodiment of the invention, wherein the lens comprises: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 6, a sixth lens 7, a seventh lens 8, an eighth lens 9 and a ninth lens 10 which are coaxially arranged in sequence from an object plane to an image plane; a diaphragm 5 is arranged between the fourth lens 4 and the fifth lens 6, the angle between the object plane OBJ and the optical axis of the lens can be adjusted at will from 45 degrees to 90 degrees, and the angle between the image plane 11 and the optical axis of the lens is correspondingly adjusted according to the angle between the object plane OBJ and the optical axis of the lens;
the lens satisfies the following conditions:
PMAG=0.295，F.NO = 6，EFFL=2850mm，TTL=215mm；
wherein PMAG is the magnification of the lens, F.NO is the relative aperture of the lens, EFFL is the effective focal length of the lens, and TTL is the optical total length of the lens;
the first lens 1 is a biconvex positive lens, the second lens 2 is a biconvex positive lens, the third lens 3 is a biconcave negative lens, the fourth lens 4 is a biconcave positive lens, the fifth lens 6 is a concave-convex positive lens, the sixth lens 7 is a biconcave negative lens, the seventh lens 8 is a concave-convex negative lens, the eighth lens 9 is a concave-convex positive lens, and the ninth lens 10 is a concave-convex positive lens.
The lens has the advantages of large target surface, high resolution, telecentric design and the like, and can meet the requirement of simultaneously displaying the plane effect and the 3D effect; the object plane OBJ is adjustable at any angle from 0 to 45 degrees, the image plane 11 is adjustable at any angle from 0 to 45 degrees, and the lens can meet imaging requirements when inclined from 0 to 45 degrees by utilizing the law of the Moer, so that the application scene is wide; the materials adopted by the third lens 3 and the seventh lens 8 are high-refractive-index glass, and the materials adopted by the second lens 2 are low-dispersion-coefficient glass, so that aberration in an optical system of the lens is effectively reduced, the structure is simple, the manufacturing is convenient, the imaging effect is improved, the manufacturing cost is saved, and the lens is favorable for popularization and application.
The optical axis of the lens is not a solid line of the object, but an optically-referenced line, i.e., a horizontal line connecting the object plane OBJ and the image plane 11 in fig. 1. As can be easily understood from fig. 1, the angle between the object plane and the optical axis of the lens can be arbitrarily adjusted from 45 ° to 90 °, and the angle between the image plane and the optical axis of the lens is correspondingly adjusted according to the angle between the object plane and the optical axis of the lens; can be converted into: the angle between the object plane and the lens can be adjusted at will from 0 degree to 45 degrees, and the angle between the image plane and the lens is correspondingly adjusted according to the angle of the object plane, so that the object can be imaged clearly from 0 degree to 45 degrees, and the perfect display from the plane to the 3D effect is realized.
In one example of this embodiment, the diaphragm 5 is placed at the position where the focal points of the front group lens and the rear group lens coincide, thereby realizing the double telecentric function of the lens;
wherein the front group of lenses comprises a first lens 1, a second lens 2, a third lens 3 and a fourth lens 4, and the rear group of lenses comprises a fifth lens 6, a sixth lens 7, a seventh lens 8, an eighth lens 9 and a ninth lens 10; the focal points of the front group of lenses and the rear group of lenses are overlapped at the center position of the diaphragm 5, so that the double telecentric function of the lens can be realized; the diaphragm 5 may also be used to adjust the spot size of the lens, control the amount of incoming light, etc.
In an example of an embodiment, the focal lengths of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 6, the sixth lens 7, the seventh lens 8, the eighth lens 9 and the ninth lens 10 satisfy the following conditions:
f/f1=19.56，f1=145.8mm；
f/f2=36.741，f2=77.624mm；
f/f3=-50.894，f3=-56.038mm；
f/f4=32.351，f4=88.158mm；
f/f5=128.991，f5=22.11mm；
f/f6=-298.638，f6=-9.55mm；
f/f7=-67.0899，f7=-42.51mm；
f/f8=92.193，f8=30.935mm；
f/f9=94.9113，f9=30.049mm；
wherein f is the effective focal length of the lens, f1 is the focal length of the first lens 1, f2 is the focal length of the second lens 2, f3 is the focal length of the third lens 3, f4 is the focal length of the fourth lens 4, f5 is the focal length of the fifth lens 6, f6 is the focal length of the sixth lens 7, f7 is the focal length of the seventh lens 8, f8 is the focal length of the eighth lens 9, and f9 is the focal length of the ninth lens 10;
in this example, the materials of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 6, the sixth lens 7, the seventh lens 8, the eighth lens 9 and the ninth lens 10 satisfy the following conditions:
a first lens: 1.60< Nd <1.80, 40< Vd <62;
a second lens: 1.45< Nd <1.75, 45< Vd <90;
a third lens: 1.65< Nd <1.85, 23< Vd <55;
fourth lens: 1.70< Nd <2.0, 17< vd <55;
a fifth lens: 1.45< Nd <1.75, 45< Vd <82;
a sixth lens: 1.60< Nd <1.80, 25< Vd <62;
seventh lens: 1.70< Nd <1.95, 18< Vd <55;
eighth lens: 1.50< Nd <1.75, 30< Vd <62;
a ninth lens: 1.62< Nd <1.85, 20< Vd <62;
where Nd is the refractive index and Vd is the dispersion coefficient.
In the example of the embodiment, the high-resolution large-target-area telecentric lens can be a component/accessory of an optical detection device, an imaging device or a photographic device, or can be a separate telecentric camera, and is not particularly limited thereto.
As shown in fig. 2, in one embodiment, the first lens 1 is a biconvex positive lens, the dispersion coefficient Vd thereof is 40< Vd <62, the refractive index Nd is 1.60< Nd <1.80, the radius of curvature of the front and rear surfaces of the first lens 1 is R11 and R12, respectively, and the core thickness thereof in the optical axis direction is d1, wherein 100mm < R11<1000mm, -500mm < R12< -100mm, and 2< d1<12mm.
In a preferred example of this embodiment, the radii of curvature of the front and rear surfaces of the first lens 1 are R11 and R12, respectively, R11 is 168.8238 mm, R12 is-168.8238 mm, d1 is 11.48mm, nd is 1.62, and Vd is 60.
It should be noted that, the first lens 1 of the present embodiment only provides a part of preferred examples, and the first lens 1 satisfies 1.60< Nd <1.80, 40< vd <62, and is not limited to the values of Nd 1.62 and vd 60, but may also be other values within the range of 1.60< Nd <1.80, 40< vd <62, and the present embodiment is not limited thereto.
As shown in fig. 3, in one embodiment, the second lens 2 is a biconvex positive lens, the dispersion coefficient Vd thereof is 45< Vd <90, the refractive index Nd is 1.45< Nd <1.75, the radius of curvature of the front and rear surfaces of the second lens 2 is R21 and R22, respectively, and the core thickness thereof in the optical axis direction is d3, wherein 60mm < R21<150mm, -300mm < R22< -55mm,3< d3<20mm;
as shown in fig. 4, the third lens 3 is a negative lens with a double negative concave shape, the dispersion coefficient Vd is 23< Vd <55, the refractive index Nd is 1.65< Nd <1.85, the radius of curvature of the front and rear surfaces of the third lens 3 is R31 and R32, respectively, and the core thickness thereof along the optical axis direction is d4, wherein-100 mm < r31< -50mm,50mm < r32<200mm, and 0.7< d4<5mm.
In a preferred example of this embodiment, R21 is 65.742mm, R22 is-81.7969 mm, d3 is 12.081mm, nd is 1.49, vd is 81; the distance d2 between the second lens 2 and the first lens 1 in the optical axis direction is 32.523mm.
Similarly, the values of nd and Vd for the third lens 3 may be satisfied: other values in the range of 1.65< nd <1.85, 23< vd <55, the present example is not limited thereto.
In a preferred example of this embodiment, R31 is-81.797 mm, R32 is 90.2mm, d4 is 1.5mm, nd is 1.80, and Vd is 25.4; the third lens 3 and the second lens 2 may be bonded to form an achromatic lens.
As shown in fig. 5, in one embodiment, the fourth lens 4 is a convex-concave positive lens, the dispersion coefficient Vd thereof is 17< Vd <55, the refractive index Nd is 1.70< Nd <2.0, the radius of curvature of the front and rear surfaces of the fourth lens 4 is R41 and R42, respectively, and the core thickness thereof in the optical axis direction is d6, wherein 45mm < R41<150mm,60mm < R42<500mm, and 1.5< d6<8mm.
In a preferred example of this embodiment, R41 is 61.387mm, R42 is 196.152mm, d6 is 3.6mm, nd is 1.94, and Vd is 17.9; the distance d5 between the fourth lens 3 and the third lens 4 in the optical axis direction is 50.42mm, and the distance d7 between the fourth lens 4 and the diaphragm 5 in the optical axis direction is 39.438mm.
As shown in fig. 6, in one embodiment, the fifth lens 6 is a concave-convex positive lens, the dispersion coefficient Vd thereof is 45< Vd <82, the refractive index Nd is 1.45< Nd <1.75, the radius of curvature of the front and rear surfaces of the fifth lens 6 is R61 and R62, respectively, and the core thickness thereof in the optical axis direction is d9, wherein-100 mm < r61< -40mm, -50mm < r62< -10mm,1mm < d9<8mm.
In a preferred example of this embodiment, R61 is-55.012 mm, R62 is-10.104 mm, d9 is 2.5mm, nd is 1.61, vd is 58; the distance d8 between the fifth lens 6 and the diaphragm 5 in the optical axis direction is 3.07mm.
As shown in fig. 7, in one embodiment, the sixth lens 7 is a biconcave negative lens, the dispersion coefficient Vd thereof is 25< Vd <62, the refractive index coefficient is 1.60< nd <1.80, the radius of curvature of the front and rear surfaces of the sixth lens 7 is R71 and R72, respectively, and the core thickness thereof in the optical axis direction is d11, wherein-30 mm < r71< -5mm,10mm < r72<70mm,1mm < d11<7.5mm.
In a preferred example of this embodiment, R71 is-7.309 mm, R72 is 52.887mm, d11 is 8.2mm, nd is 1.64, and Vd is 33.7; the distance d10 between the sixth lens 7 and the fifth lens 6 in the optical axis direction is 2.047mm.
As shown in fig. 8, in one embodiment, the seventh lens 8 is a concave-convex negative lens having an dispersion coefficient Vd of 18< Vd <55, a refractive index Nd of 1.70< Nd <1.95, and the front and rear surfaces of the seventh lens 8 have radii of curvature divided into R81 and R82, and a core thickness in the optical axis direction of d12, wherein-100 mm < r81< -25mm, -300mm < r82< -80mm,0.7mm < d12<7mm;
in a preferred example of this embodiment, R81 is-35.087 mm, R82 is-244.854 mm, d12 is 1.39mm, nd is 1.84, and Vd is 23.7; the distance d17 between the seventh lens 8 and the sixth lens 7 in the optical axis direction was 6.92mm.
As shown in fig. 9, the eighth lens 9 is a concave-convex positive lens, the dispersion coefficient Vd is 30< Vd <62, the refractive index Nd is 1.50< Nd <1.75, the radius of curvature of the front and rear surfaces of the eighth lens 9 is divided into R91 and R92, and the core thickness thereof in the optical axis direction is d13, wherein-500 mm < r91< -50mm, -50mm < r92< -10mm,2mm < d13<7mm.
In a preferred example of this embodiment, R91 is-244.8542 mm, R92 is-18.746 mm, d13 is 4.799mm, nd is 1.60, and Vd is 59.4; the eighth lens 9 and the seventh lens 8 can be joined into an adhesive lens.
As shown in fig. 10, in one embodiment, the ninth lens 10 is a concave-convex positive lens, the dispersion coefficient Vd thereof is 20< Vd <62, the refractive index Nd is 1.62< Nd <1.85, the radius of curvature of the front and rear surfaces of the ninth lens 10 is divided into R101 and R102, and the core thickness thereof in the optical axis direction is d15, wherein-500 mm < R101< -50mm, -50mm < R102< -10mm,2mm < d15<7mm.
In a preferred example of this embodiment, R101 is-426.644 mm, R102 is-24.5305 mm, d15 is 4.777mm, nd is 1.76, vd is 49.2; the distance d14 between the ninth lens 10 and the eighth lens 9 in the optical axis direction is 0.5mm; the distance d16 between the ninth lens 10 and the image plane 11 is 27.26mm.
In one embodiment, the materials used for the third lens 3 and the seventh lens 8 are high refractive index glass, and the materials used for the second lens 2 are low dispersion coefficient glass, so that aberration in an optical system of the lens can be effectively reduced, the structure of the lens is simple, the manufacturing is convenient, and the imaging effect is improved.
As shown in fig. 1, in one embodiment, the second lens 2 and the third lens 3 form a first set of bonded lenses, the seventh lens 8 and the eighth lens 9 form a second set of bonded lenses, and the first set of bonded lenses and the second set of bonded lenses are achromatic bonded lenses.
In one example of this embodiment, the second lens 2 and the third lens 3 may be joined by a transparent adhesive; the seventh lens 8 and the eighth lens 9 may be joined by a transparent adhesive; the adhesive may be any commercially available product, and is not limited herein.
The working principle of the embodiment of the invention is as follows: in this embodiment, the lens formed by the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the diaphragm 5, the fifth lens 6, the sixth lens 7, the seventh lens 8, the eighth lens 9 and the ninth lens 10 adopts the principle of the poloxamer (law of the poloxamer), and the object plane is designed to incline from 0 ° to 45 °, so that the lens can meet the imaging requirement when inclining from 0 ° to 45 °. The materials adopted by the third lens 3 and the seventh lens 8 are high-refractive-index glass, the materials adopted by the second lens 2 are low-dispersion-coefficient glass, aberration in an optical system of the lens is effectively reduced, and the imaging lens has the advantages of simple structure, convenience in manufacturing and improved imaging effect.
As shown in fig. 15, fig. 15 shows a propagation path diagram of light entering from the present embodiment. The optical performance of this example was verified by the following detailed experiment; the results are shown in fig. 11 to 14.
In fig. 11, the abscissa indicates the spatial frequency of line pairs per millimeter (lp/mm), and the ordinate indicates the MTF value, and the higher the curve, the better the imaging quality. Where the OTF is collectively referred to as optical transfer function, which refers to the optical transfer function, the vertical axis in this embodiment is the optical modulation transfer function, i.e., MTF. As can be seen from fig. 11, the present embodiment exhibits a better contrast in a spatial frequency of 100lp/mm, which can indicate that the overall resolution level of the present embodiment is higher.
As shown in fig. 12, which is an aberration diagram of the lens in the present embodiment, overall, the aberration overlap ratio is high, so that aberration balance in the whole imaging process is ensured; fig. 13 is a schematic diagram showing distortion of a lens in the present embodiment, which is a vertical axis aberration, and only changes the position of an off-axis imaging convergence point, without affecting the imaging definition.
As shown in fig. 14, a point column DIAGRAM (SPOT diameter) of the lens in FIELD (FIELD) of view of the present embodiment is shown, wherein the lower numerical values in the table in the figure represent: the smaller the value, the better the imaging quality. As can be seen from fig. 14, the imaging points under each view are almost all converged into one ideal point, indicating that the present embodiment has good imaging performance.
Above-mentioned, verification result shows that the optical performance of the lens of this embodiment is good, has advantages such as big target surface, high resolution, double telecentricity, can satisfy the demand of show plane effect and 3D effect simultaneously.
The high-resolution large-target-area-surface-magnetic-element telecentric lens breaks through the conventional design, can clearly image objects from 0 degrees to 45 degrees, and achieves perfect display from a plane to a 3D effect. Meanwhile, the diaphragm is arranged at the position where the focuses of the front group of lenses and the rear group of lenses coincide, so that the double telecentric function of the lens is realized; the object plane is adjustable from any angle within 0 to 45 degrees; the image plane is arbitrarily adjustable within the range from 0 DEG to 45 DEG; the lens provided by the embodiment has the advantages of high resolution, low distortion, double telecentricity, large target surface and the like, the second lens is made of low-dispersion-coefficient glass, the third lens and the seventh lens are made of high-refractive-index glass, aberration in an optical system of the lens is effectively reduced, the structure is simple, the manufacturing is convenient, the imaging effect is improved, and the manufacturing cost is reduced.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. A high resolution large target surface-mount telecentric lens, characterized in that the lens comprises: the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens are coaxially arranged in sequence from the object plane to the image plane; a diaphragm is arranged between the fourth lens and the fifth lens, the angle between the object plane and the optical axis of the lens can be adjusted at will from 45 degrees to 90 degrees, and the angle between the image plane and the optical axis of the lens is correspondingly adjusted according to the angle between the object plane and the optical axis of the lens;
the lens satisfies the following conditions:
PMAG=0.295，F.NO = 6，EFFL=2850mm，TTL=215mm；
wherein PMAG is the magnification of the lens, F.NO is the relative aperture of the lens, EFFL is the effective focal length of the lens, and TTL is the optical total length of the lens;
the first lens is a biconvex positive lens, the second lens is a biconvex positive lens, the third lens is a biconcave negative lens, the fourth lens is a biconcave positive lens, the fifth lens is a concave-convex positive lens, the sixth lens is a biconcave negative lens, the seventh lens is a concave-convex negative lens, the eighth lens is a concave-convex positive lens, and the ninth lens is a concave-convex positive lens.
2. The high resolution large target surface telecentric lens of claim 1, wherein the front and back surfaces of the first lens have radii of curvature of R11 and R12, respectively, and the core thickness thereof along the optical axis direction is d1, wherein 100mm < R11<1000mm, -500mm < R12< -100mm, and 2mm < d1<12mm.
3. The high resolution large target surface telecentric lens of claim 1, wherein the radius of curvature of the front and rear surfaces of the second lens is R21 and R22, respectively, the core thickness thereof along the optical axis direction is d3, wherein 60mm < R21<150mm, -300mm < R22< -55mm, 3mm < d3<20mm;
the radius of curvature of the front and rear surfaces of the third lens is R31 and R32, respectively, and the core thickness of the third lens in the optical axis direction is d4, wherein R31< -50mm,50mm<R32<200mm,0.7 mm > d4<5mm is-100 mm.
4. The high resolution large target telecentric lens of claim 1, wherein the front and back surfaces of the fourth lens have radii of curvature R41 and R42, respectively, and the core thickness along the optical axis direction is d6, wherein 45mm<R41<150mm,60mm<R42<500mm,1.5 mm < d6<8mm.
5. The high resolution large target surface telecentric lens of claim 1, wherein the front and back surfaces of the fifth lens have radii of curvature of R61 and R62, respectively, and the core thickness thereof along the optical axis direction is d9, wherein-100 mm < R61< -40mm, -50mm < R62< -10mm,1mm < d9<8mm.
6. The high resolution large target surface telecentric lens of claim 1, wherein the front and back surfaces of the sixth lens have radii of curvature of R71 and R72, respectively, and the core thickness thereof along the optical axis direction is d11, wherein-30 mm < R71< -5mm,10mm < R72<70mm,1mm < d11<7.5mm.
7. The high resolution large target surface telecentric lens of claim 1, wherein the radius of curvature of the front and rear surfaces of the seventh lens is divided into R81 and R82, the core thickness thereof along the optical axis direction is d12, wherein-100 mm < R81< -25mm, -300mm < R82< -80mm,0.7mm < d12<7mm;
the radius of curvature of the front and rear surfaces of the eighth lens is divided into R91 and R92, and the core thickness of the eighth lens in the optical axis direction is d13, wherein-500 mm < R91< -50mm, -50mm < R92< -10mm,2mm < d13<7mm.
8. The high resolution large target surface telecentric lens of claim 1, wherein the radius of curvature of the front and rear surfaces of the ninth lens is divided into R101 and R102, and the core thickness thereof along the optical axis direction is d15, wherein-500 mm < R101< -50mm, -50mm < R102< -10mm,2mm < d15<7mm.
9. The high resolution high target telecentric lens of claim 1, wherein the second and third lenses comprise a first set of bonded lenses, the seventh and eighth lenses comprise a second set of bonded lenses, and the first and second sets of bonded lenses are achromatic bonded lenses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310080437.XA CN116482844B (en) | 2023-02-08 | 2023-02-08 | High-resolution large-target-area-surface-area-magnetic-fiber telecentric lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310080437.XA CN116482844B (en) | 2023-02-08 | 2023-02-08 | High-resolution large-target-area-surface-area-magnetic-fiber telecentric lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116482844A CN116482844A (en) | 2023-07-25 |
| CN116482844B true CN116482844B (en) | 2024-01-09 |
Family
ID=87225653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310080437.XA Active CN116482844B (en) | 2023-02-08 | 2023-02-08 | High-resolution large-target-area-surface-area-magnetic-fiber telecentric lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116482844B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000171710A (en) * | 1998-12-08 | 2000-06-23 | Ricoh Co Ltd | Zoom lens |
| JP2005043607A (en) * | 2003-07-28 | 2005-02-17 | Ricoh Co Ltd | Zoom lens, camera, portable information terminal device and projector |
| US7813050B1 (en) * | 2009-06-04 | 2010-10-12 | Hon Hai Precision Industry Co., Ltd. | Zoom lens and image capturing module using same |
| CN108267848A (en) * | 2017-12-19 | 2018-07-10 | 苏州莱能士光电科技股份有限公司 | A kind of doubly telecentric optical imaging system of high telecentricity |
| KR20180123622A (en) * | 2017-05-09 | 2018-11-19 | 둥관 위퉁 옵티컬 테크놀로지 컴퍼니 리미티드 | Large aperture super wide angle and super high quality zoom lens |
| CN109116532A (en) * | 2018-10-17 | 2019-01-01 | 舜宇光学(中山)有限公司 | Zoom lens |
| JP2019191273A (en) * | 2018-04-19 | 2019-10-31 | オリンパス株式会社 | Objective lens |
| CN110456477A (en) * | 2019-07-30 | 2019-11-15 | 福建福光天瞳光学有限公司 | The low distortion backsight optical system of one kind and imaging method |
| CN110824678A (en) * | 2019-11-28 | 2020-02-21 | 广州长步道光电科技有限公司 | High-resolution low-distortion large-target-surface telecentric optical lens system |
| CN212905668U (en) * | 2020-08-07 | 2021-04-06 | 威海恩腾光电科技有限公司 | Wide-angle high-definition lens for smart home |
| CN114114620A (en) * | 2021-11-19 | 2022-03-01 | 江西凤凰光学科技有限公司 | High-definition day and night high-low temperature confocal optical lens |
| CN114624866A (en) * | 2021-12-31 | 2022-06-14 | 福建福光股份有限公司 | Super-wide-angle large-target-surface satellite-borne optical system and imaging method thereof |
| CN115291373A (en) * | 2022-07-28 | 2022-11-04 | 广州长步道光学科技有限公司 | Focal length extension subassembly of FA industrial lens |
| JP2022178447A (en) * | 2021-05-20 | 2022-12-02 | キヤノン株式会社 | ZOOM LENS AND IMAGING DEVICE HAVING THE SAME |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013148780A (en) * | 2012-01-20 | 2013-08-01 | Sony Corp | Zoom lens and image pickup apparatus |
| TWI597518B (en) * | 2015-12-28 | 2017-09-01 | 鴻海精密工業股份有限公司 | Zoom lens and image device using the same |
| CN111929849B (en) * | 2020-09-29 | 2020-12-18 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
-
2023
- 2023-02-08 CN CN202310080437.XA patent/CN116482844B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000171710A (en) * | 1998-12-08 | 2000-06-23 | Ricoh Co Ltd | Zoom lens |
| JP2005043607A (en) * | 2003-07-28 | 2005-02-17 | Ricoh Co Ltd | Zoom lens, camera, portable information terminal device and projector |
| US7813050B1 (en) * | 2009-06-04 | 2010-10-12 | Hon Hai Precision Industry Co., Ltd. | Zoom lens and image capturing module using same |
| KR20180123622A (en) * | 2017-05-09 | 2018-11-19 | 둥관 위퉁 옵티컬 테크놀로지 컴퍼니 리미티드 | Large aperture super wide angle and super high quality zoom lens |
| CN108267848A (en) * | 2017-12-19 | 2018-07-10 | 苏州莱能士光电科技股份有限公司 | A kind of doubly telecentric optical imaging system of high telecentricity |
| JP2019191273A (en) * | 2018-04-19 | 2019-10-31 | オリンパス株式会社 | Objective lens |
| CN109116532A (en) * | 2018-10-17 | 2019-01-01 | 舜宇光学(中山)有限公司 | Zoom lens |
| CN110456477A (en) * | 2019-07-30 | 2019-11-15 | 福建福光天瞳光学有限公司 | The low distortion backsight optical system of one kind and imaging method |
| CN110824678A (en) * | 2019-11-28 | 2020-02-21 | 广州长步道光电科技有限公司 | High-resolution low-distortion large-target-surface telecentric optical lens system |
| CN212905668U (en) * | 2020-08-07 | 2021-04-06 | 威海恩腾光电科技有限公司 | Wide-angle high-definition lens for smart home |
| JP2022178447A (en) * | 2021-05-20 | 2022-12-02 | キヤノン株式会社 | ZOOM LENS AND IMAGING DEVICE HAVING THE SAME |
| CN114114620A (en) * | 2021-11-19 | 2022-03-01 | 江西凤凰光学科技有限公司 | High-definition day and night high-low temperature confocal optical lens |
| CN114624866A (en) * | 2021-12-31 | 2022-06-14 | 福建福光股份有限公司 | Super-wide-angle large-target-surface satellite-borne optical system and imaging method thereof |
| CN115291373A (en) * | 2022-07-28 | 2022-11-04 | 广州长步道光学科技有限公司 | Focal length extension subassembly of FA industrial lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116482844A (en) | 2023-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105676422B (en) | Photographic optical system | |
| KR20180123622A (en) | Large aperture super wide angle and super high quality zoom lens | |
| CN108319004B (en) | High-pixel ultra-wide angle optical system and camera module applying same | |
| CN119335697B (en) | An industrial lens with large image surface, low distortion and low chromatic aberration | |
| CN113777765B (en) | Lens barrel | |
| TWI863536B (en) | Fixed-focus lens | |
| CN110824678B (en) | High-resolution low-distortion large-target-surface telecentric optical lens system | |
| TWM629500U (en) | Optical imaging system | |
| CN114815192A (en) | Zoom lens and imaging device | |
| WO2023109491A1 (en) | Vehicle-mounted lens | |
| CN216285930U (en) | Fixed focus lens | |
| CN118962944B (en) | A catadioptric panoramic lens | |
| CN116482844B (en) | High-resolution large-target-area-surface-area-magnetic-fiber telecentric lens | |
| KR20230100342A (en) | Optical imaging system | |
| CN117434695B (en) | Front-view optical lens, imaging device and driving tool with same | |
| CN110941086B (en) | Ultra-short low-distortion shimmer imaging optical system | |
| TWI859805B (en) | Optical imaging system | |
| CN115145004B (en) | Combined lens group and lens | |
| CN111399197B (en) | Zoom telecentric lens | |
| CN213934368U (en) | Large-target-surface five-million-pixel optical lens | |
| CN118226627B (en) | Dual-optical-path telecentric lens and imaging device | |
| CN112394486A (en) | Large-target-surface five-million-pixel optical lens and imaging method thereof | |
| CN113050258A (en) | Lens, imaging system and electronic equipment | |
| CN117970612B (en) | Looking-around lens, imaging device and driving tool with same | |
| TWI899031B (en) | Optical imaging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |