WO2021232922A1 - 一种定焦光学镜头 - Google Patents
一种定焦光学镜头 Download PDFInfo
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- WO2021232922A1 WO2021232922A1 PCT/CN2021/081735 CN2021081735W WO2021232922A1 WO 2021232922 A1 WO2021232922 A1 WO 2021232922A1 CN 2021081735 W CN2021081735 W CN 2021081735W WO 2021232922 A1 WO2021232922 A1 WO 2021232922A1
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- 230000003287 optical effect Effects 0.000 title claims abstract description 101
- 230000014509 gene expression Effects 0.000 claims abstract description 5
- 230000005499 meniscus Effects 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
Definitions
- the invention belongs to the technical field of optical imaging, and specifically relates to a fixed-focus optical lens.
- the 1-inch target surface 20 million pixel camera and the 1.1-inch target surface 12 million pixel camera have been used more and more widely in high-precision inspection of machine vision in recent years.
- There are very few lenses that match the resolution of a 20-megapixel camera with a 1-inch target surface and the distortion and lens size are inadequate, especially for imaging at relatively close distances. Therefore, it is more urgent to develop optical lenses with high pixels, large target surfaces, and low distortion.
- the purpose of the present invention is to provide a fixed-focus optical lens with a maximum resolution of 200lp/mm, matching 2.5 ⁇ m pixel chips, a maximum target surface size of 1.1 inches, and low distortion at the same time. performance.
- a fixed-focus optical lens includes an optical device.
- the optical device sequentially sets a focus group S1 with a positive refractive power and a fixed group S2 with a positive refractive power from the object side to the image side.
- the focus group S1 includes a first A cemented lens U1, a diaphragm, a second cemented lens U2, and a third cemented lens U3,
- the fixed group S2 includes a ninth lens G9, the focal length of the optical device is f, and the focal length of the focusing group S1 is fS1 ,
- the focal length of the fixed group S2 is fS2, which respectively satisfy the relational expressions: 0.80 ⁇
- the focusing group S1 includes a first lens G1 with a positive refractive power and a meniscus structure, a second lens with a positive refractive power and a biconvex structure G2, the third lens G3 with negative refractive power and biconcave structure, the fourth lens G4 with negative refractive power and biconcave structure, the fifth lens G5 with positive refractive power and biconvex structure, the negative refractive power
- the sixth lens G6 with high power and biconcave structure, the seventh lens G7 with positive power and biconvex structure, and the eighth lens G8 with positive power and biconvex structure, the second lens G2 and the first lens
- the three lenses G3 are cemented into the first cemented lens group U1 with negative refractive power; the fourth lens G4 and the fifth lens G5 are cemented into the second cemented lens group U2 with positive refractive power;
- the sixth lens G6 and the seventh lens G7 are cemented into the third cemented lens group
- the ninth lens G9 has a positive refractive power and a meniscus structure.
- the first lens G1, the second lens G2, the third lens G3, the fourth lens G4, and the fifth lens G5, the sixth lens G6, the seventh lens G7, the eighth lens G8, and the ninth lens G9 are all spherical lenses.
- the distance L from the vertex of the front surface of the first lens G1 of the optical device to the vertex of the rear surface of the ninth lens and the focal length f of the optical device satisfy Relational expression:
- the optical back focal length BFL of the optical device and the focal length f of the optical device satisfy the relationship:
- the half-image height y'of the optical device and the focal length f of the optical device satisfy the relationship:
- the focal length of the first lens G1 is fG1, and the ratio of the focal length fG1 to the focal length f of the optical device satisfies the relationship: 1.20 ⁇
- the focal length of the eighth lens G8 is fG8, and the ratio of its focal length fG8 to the focal length f of the optical device satisfies the relationship: 1.00 ⁇
- the focal length of the first cemented lens group U1 is f U1, and the ratio of the focal length f U1 to the focal length f of the optical device satisfies the relationship: 2.80 ⁇
- the focal length of the second cemented lens group U2 is f U2, and the ratio of the focal length f U2 to the focal length f of the optical device satisfies the relationship: 2.50 ⁇
- the focal length of the third cemented lens group U3 is f U3, and the ratio of the focal length f U3 to the focal length f of the optical device satisfies the relationship: 2.40 ⁇
- the air gap between the focus group S1 and the fixed group S2 is Dt, and the air gap Dt is relative to the focal length f of the optical device.
- the present invention includes an optical device, the optical device sequentially arranges a focusing group S1 with a positive optical power and a fixed group S2 with a positive optical power from the object side to the image side, the focusing group S1 It includes a first cemented lens U1, a diaphragm, a second cemented lens U2, and a third cemented lens U3, the fixed group S2 includes a ninth lens G9, the focal length of the optical device is f, and the focal length of the focusing group S1 Is fS1, and the focal length of the fixed group S2 is fS2, respectively satisfying the relational expressions: 0.80 ⁇
- the optical device of a low-distortion industrial lens with a focal length of 50mm is realized, the image-side F number is 2.8, the maximum imaging surface is ⁇ 17.6mm, and the maximum resolution can reach 200lp/mm, which can be matched with 2.5 ⁇ m pixel chip, corresponding When using the 1.1" chip, its pixels can reach 23 million pixels, and the maximum optical distortion of the full field of view is less than 0.15%; using the floating focus method, its clear aperture can also be flexibly adjusted.
- FIG. 1 is a schematic diagram of the structure of the optical device of the present invention.
- Fig. 2 is an optical distortion curve diagram of the optical device of the present invention.
- the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense.
- it may be a fixed connection or a detachable connection.
- integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between the two components.
- the specific meanings of the above-mentioned terms in the present invention can be understood according to specific circumstances.
- a fixed-focus optical lens includes an optical device.
- the optical device sequentially sets a focus group S1 with positive power and a fixed group S2 with positive power from the object side to the image side.
- the group S1 includes a first cemented lens U1, a diaphragm, a second cemented lens U2, and a third cemented lens U3.
- the fixed group S2 includes a ninth lens G9.
- the focal length of the optical device is f
- the focal length of the focusing group S1 is fS1.
- the focal length of group S2 is fS2, which respectively satisfy the relationship: 0.80 ⁇
- the focusing group S1 includes a first lens G1 with a positive refractive power and a meniscus structure, a second lens G2 with a positive refractive power and a biconvex structure, a third lens G3 with a negative refractive power and a biconcave structure ,
- the second lens G2 and the third lens G3 are cemented into the first cemented lens group U1 with negative refractive power;
- the lens G4 and the fifth lens G5 are cemented into the second cemented lens group U2 with positive refractive power;
- the sixth lens G6 and the seventh lens G7 are cemented into the third cemented lens group U3 with negative refractive power.
- the ninth lens G9 has a positive refractive power and a meniscus structure.
- the first lens G1, the second lens G2, the third lens G3, the fourth lens G4, the fifth lens G5, the sixth lens G6, the seventh lens G7, the eighth lens G8 and the ninth lens G9 are all spherical lenses.
- the distance L from the vertex of the front surface of the first lens G1 of the optical device to the vertex of the rear surface of the ninth lens and the focal length f of the optical device satisfy the relationship:
- the optical back focus BFL of the optical device and the focal length f of the optical device satisfy the relationship:
- the half-image height y'of the optical device and the focal length f of the optical device satisfy the relationship:
- the focal length of the first lens G1 is fG1, and the ratio of the focal length fG1 to the focal length f of the optical device satisfies the relationship: 1.20 ⁇
- the focal length of the first cemented lens group U1 is f U1, and the ratio of the focal length f U1 to the focal length f of the optical device satisfies the relationship: 2.80 ⁇
- the air gap between the focusing group S1 and the fixed group S2 is Dt, and the ratio of the air gap Dt to the focal length f of the optical device satisfies the relationship:
- the aperture of the diaphragm of the optical device is a circular hole, and the aperture of the diaphragm is adjustable within the range of F2.8 to F16.
- optical device data is as follows:
- the focal length f of the optical device is 50mm
- the optical back focal length BFL 13.0mm
- the focal length of the second cemented lens group fU2 135.2mm
- the focal length of the third cemented lens group fU3 -129.6mm
- the air gap Dt 8.4 mm.
- Fig. 2 is an optical distortion curve diagram of this embodiment, the maximum optical distortion in the full field of view is less than 0.15%;
- the optical device of a low-distortion industrial lens with a focal length of 50mm is realized.
- the image-side F number is 2.8
- the maximum imaging surface is ⁇ 17.6mm
- the maximum resolution can reach 200lp/mm, which can match 2.5 ⁇ m pixel chip, corresponding
- the pixels can reach 23 million pixels
- the maximum optical distortion of the full field of view is less than 0.15%
- using the floating focus method its clear aperture can also be flexibly adjusted.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
Description
表面 | 半径(mm) | 厚度(mm) | 折射率 |
G1前表面 | 43.6 | 2.9 | 1.7 |
G1后表面 | 225.0 | 6.8 | |
U1前表面 | 22.8 | 6.5 | 1.7 |
U1胶合面 | -153.8 | 6.5 | 1.7 |
U1后表面 | 14.1 | 5.5 | |
光阑 | 平面 | 2.3 | |
U2前表面 | -23.6 | 1.2 | 1.7 |
U2胶合面 | 23.6 | 2.0 | 1.9 |
U2后表面 | -29.8 | 6.0 | |
U3前表面 | -13.9 | 4.8 | 1.8 |
U3胶合面 | 143.5 | 3.7 | 1.8 |
U3后表面 | -22.4 | 0.1 | |
G8前表面 | 100.2 | 2.1 | 1.8 |
G8后表面 | -100.2 | D t | |
G9前表面 | 50.0 | 2.7 | 1.7 |
G9后表面 | 276.8 | 13.0 | |
像面 | 平面 |
Claims (10)
- 一种定焦光学镜头,其特征在于:包括光学装置,所述光学装置由物方到像方依次设置具有正光焦度的调焦组S1和具有正光焦度的固定组S2,所述调焦组S1包括第一胶合透镜U1、光阑、第二胶合透镜U2及第三胶合透镜U3,所述固定组S2包括第九透镜G9,所述光学装置的焦距为f,所述调焦组S1的焦距为fS1,所述固定组S2的焦距为fS2,分别满足关系式:0.80<|fS1/f|<1.40,1.30<|fS2/f|<1.80。
- 如权利要求1所述的一种定焦光学镜头,其特征在于:所述调焦组S1包括具有正光焦度及弯月结构的第一透镜G1、具有正光焦度及双凸结构的第二透镜G2、具有负光焦度及双凹结构的第三透镜G3、具有负光焦度及双凹结构的第四透镜G4、具有正光焦度及双凸结构的第五透镜G5、具有负光焦度及双凹结构的第六透镜G6、具有正光焦度及双凸结构的第七透镜G7、以及具有正光焦度及双凸结构的第八透镜G8,所述第二透镜G2和所述第三透镜G3胶合成具有负光焦度的所述第一胶合透镜组U1;所述第四透镜G4和所述第五透镜G5胶合成具有正光焦度的所述第二胶合透镜组U2;所述第六透镜G6和所述第七透镜G7胶合成具有负光焦度的所述第三胶合透镜组U3。
- 如权利要求1所述的一种定焦光学镜头,其特征在于:所述第九透镜G9为正光焦度及弯月结构。
- 如权利要求2所述的一种定焦光学镜头,其特征在于:所述第一透镜G1、所述第二透镜G2、所述第三透镜G3、所述第四透镜G4、所述第五透镜G5、所述第六透镜G6、所述第七透镜G7、所述第八透镜G8及所述第九透镜G9均为球面镜。
- 如权利要求2所述的一种定焦光学镜头,其特征在于:所述光学装置的第一透镜G1的前表面顶点到第九透镜后表面顶点的距离L与所述光学装置的焦距f,满足关系式:|L/f|>1.10。
- 如权利要求1所述的一种定焦光学镜头,其特征在于:所述光学装置的光学后截距BFL与所述光学装置的焦距f,满足关系式:|BFL/f|<0.35。
- 如权利要求1所述的一种定焦光学镜头,其特征在于:所述光学装置的半像高y’与所述光学装置的焦距f,满足关系式:|y’/f|<0.25。
- 如权利要求2所述的一种定焦光学镜头,其特征在于:所述第一透镜G1的焦距为f G1,其焦距f G1与所述光学装置的焦距f的比值,满足关系式:1.20<|f G1/f|<1.50;所述第八透镜G8的焦距为f G8,其焦距f G8与所述光学装置的焦距f的比值,满足关系式:1.00<|f G8/f|<1.30。
- 如权利要求1所述的一种定焦光学镜头,其特征在于:所述第一胶合透镜组U1的焦距为f U1,其焦距f U1和所述光学装置的焦距f的比值,满足关系式:2.80<|f U1/f|<3.20;所述第二胶合透镜组U2的焦距为f U2,其焦距f U2和所述光学装置的焦距f的比值,满足关系式:2.50<|f U2/f|<2.90;所述第三胶合透镜组U3的焦距为f U3,其焦距f U3和所述光学装置的焦距f的比值,满足关系式:2.40<|f U3/f|<2.80。
- 如权利要求1所述的一种定焦光学镜头,其特征在于:所述调焦组S1与所述固定组S2之间的空气间隔为Dt,所述空气间隔Dt与所述光学装置的焦距f的比值,满足关系式:|Dt/f|<0.25。
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CN114994885A (zh) * | 2022-06-17 | 2022-09-02 | 湖南长步道光学科技有限公司 | 一种具有微距功能的全画幅光学系统及电影镜头 |
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CN111522126A (zh) * | 2020-05-21 | 2020-08-11 | 广东奥普特科技股份有限公司 | 一种定焦光学镜头 |
CN114114631B (zh) * | 2021-12-06 | 2023-06-27 | 福建福特科光电股份有限公司 | 定焦线扫镜头 |
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CN102331618A (zh) * | 2010-06-16 | 2012-01-25 | 株式会社理光 | 成像透镜,照相设备及便携式信息终端设备 |
JP2016038418A (ja) * | 2014-08-05 | 2016-03-22 | オリンパス株式会社 | 結像光学系及びそれを備えた光学装置 |
CN209690601U (zh) * | 2019-04-12 | 2019-11-26 | 奥普特视觉科技(苏州)有限公司 | 一种线阵镜头 |
CN210348042U (zh) * | 2019-07-18 | 2020-04-17 | 广东奥普特科技股份有限公司 | 一种高解析度镜头 |
CN111522126A (zh) * | 2020-05-21 | 2020-08-11 | 广东奥普特科技股份有限公司 | 一种定焦光学镜头 |
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Patent Citations (5)
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CN102331618A (zh) * | 2010-06-16 | 2012-01-25 | 株式会社理光 | 成像透镜,照相设备及便携式信息终端设备 |
JP2016038418A (ja) * | 2014-08-05 | 2016-03-22 | オリンパス株式会社 | 結像光学系及びそれを備えた光学装置 |
CN209690601U (zh) * | 2019-04-12 | 2019-11-26 | 奥普特视觉科技(苏州)有限公司 | 一种线阵镜头 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114994885A (zh) * | 2022-06-17 | 2022-09-02 | 湖南长步道光学科技有限公司 | 一种具有微距功能的全画幅光学系统及电影镜头 |
CN114994885B (zh) * | 2022-06-17 | 2023-09-01 | 湖南长步道光学科技有限公司 | 一种具有微距功能的全画幅光学系统及电影镜头 |
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