CN107037570B - Athermalization high-definition prime lens - Google Patents
Athermalization high-definition prime lens Download PDFInfo
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- CN107037570B CN107037570B CN201710385871.3A CN201710385871A CN107037570B CN 107037570 B CN107037570 B CN 107037570B CN 201710385871 A CN201710385871 A CN 201710385871A CN 107037570 B CN107037570 B CN 107037570B
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- lens
- athermalized
- tightly matched
- fixed focus
- definition fixed
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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
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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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
- G02B13/0055—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
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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
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention relates to the technical field of lenses, in particular to a athermalized high-definition fixed-focus lens, which sequentially comprises the following components along the incident direction of light: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the fourth lens is a glass lens, and the first lens, the second lens, the third lens, the fifth lens and the sixth lens are plastic aspheric lenses. The invention realizes that the visible light and infrared light can reach 4 megapixels under the precondition of F1.2, and can obtain clear pictures under the low-illumination environment at night, and meanwhile, the invention does not run out of focus when being used in the environment of-40 to +80 degrees.
Description
Technical Field
The invention relates to the technical field of lenses, in particular to a athermalized high-definition fixed-focus lens.
Background
With the improvement of security and protection technology level and electronic technology level, the requirements of security and protection industry on lenses are higher and higher, if a monitoring camera needs to have excellent imaging quality at night, an F1.2 large-light-passing lens must be used, the realization of the large-light-passing lens inevitably leads to the increase of the number of lenses, and the cost of the lenses is increased, or the light-passing aperture is reduced by using fewer lenses, or the imaging quality is reduced.
For this reason, it is necessary to provide a athermalized high definition fixed focus lens to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention provides a athermalized high-definition fixed focus lens, which can reach 4 megapixels under the precondition of F1.2 and in the visible light and infrared states, can obtain clear pictures under the night low-illumination environment, and is free from focus running in the environment of-40 to +80 degrees.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the athermalization high-definition fixed focus lens sequentially comprises the following components along the incident direction of light: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the first lens is tightly matched with the second lens through a soma, the second lens is tightly matched with the third lens through a spacer, the third lens is tightly matched with the fourth lens through a spacer, the fourth lens is tightly matched with the fifth lens through a spacer, and the fifth lens is tightly matched with the sixth lens through a soma; the fourth lens is a glass lens, and the first lens, the second lens, the third lens, the fifth lens and the sixth lens are plastic aspheric lenses.
Preferably, the focal length of the athermalized high definition fixed focus lens and the third lens and the fourth lens satisfy the following relationship:
2.05<︱f3/f︱<2.25；
1.98<︱f4/f︱<2.15；
wherein f is a focal length of the athermalized high-definition fixed focus lens, f3 is a focal length of the third lens, and f4 is a focal length of the fourth lens.
Preferably, the first lens is a lens with negative focal power, the second lens is a lens with negative focal power, the third lens is a lens with positive focal power, the fourth lens is a lens with positive focal power, the fifth lens is a lens with negative focal power, and the sixth lens is a lens with positive focal power.
Preferably, the fourth lens and the fifth lens are optically cemented into a cemented lens.
Preferably, the ranges of lens focal lengths, refractive indices and radii of curvature of the first to sixth lenses are as follows:
| f1＝-4.8—-5.5 | n1＝1.45—1.65 | R1＝-24—-26.5 | R2＝3.05—3.45 |
| f2＝-26—-27.5 | n2＝1.55—1.75 | R3＝-3.05—-3.45 | R4＝-4.0—-5.0 |
| f3＝7.8—8.6 | n3＝1.45—1.65 | R5＝6.0-7.5 | R6＝-11.5—-13 |
| f4＝7.7—8.5 | n4＝1.45—1.65 | R7＝7.2—8.9 | R8＝-7.2—-8.9 |
| f5＝-5.2—-6.1 | n5＝1.55—1.75 | R9＝-21—-22 | R10＝4.1—5.1 |
| f6＝5.2—6.1 | n6＝1.45—1.65 | R11＝3.5—4.3 | R12＝-17.5—-18.8 |
wherein f1 to f6 correspond to focal lengths of the first lens to the sixth lens, n1 to n6 correspond to refractive indexes of the first lens to the sixth lens, and R is a radius of curvature.
The invention relates to a athermalized high-definition fixed focus lens, which sequentially comprises the following components along the incident direction of light: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the first lens is tightly matched with the second lens through a soma, the second lens is tightly matched with the third lens through a spacer, the third lens is tightly matched with the fourth lens through a spacer, the fourth lens is tightly matched with the fifth lens through a spacer, and the fifth lens is tightly matched with the sixth lens through a soma; the fourth lens is a glass lens, the first lens, the second lens, the third lens, the fifth lens and the sixth lens are plastic aspheric lenses, and through the glass-plastic mixed optical structure of five plastic lenses of one glass lens, the functions of eliminating aberration of plastic aspheric surfaces and correcting infrared rays of the glass lenses are fully utilized, so that 400 ten thousand pixels can be achieved under the condition of F1.2 and in the visible and infrared environments, the use requirement of the invention on the resolution of a chip is reduced, the production cost is reduced under the condition of maintaining the performance, and in addition, the functions of obtaining clear pictures at night and avoiding defocusing in the environment of-40 to +80 degrees are realized.
Drawings
Fig. 1 is a schematic structural diagram of a athermalized high definition fixed focus lens according to the present invention.
Detailed Description
Embodiments of the present invention will now be described in detail with reference to the drawings, which are intended to be used as references and illustrations only, and are not intended to limit the scope of the invention.
Referring to fig. 1, a athermalized high-definition fixed focus lens according to the present invention sequentially includes, along a light incident direction: the lens comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5 and a sixth lens 6, wherein the first lens 1 is tightly matched with the second lens 2 through a soma, the second lens 2 is tightly matched with the third lens 3 through a spacing ring, the third lens 3 is tightly matched with the fourth lens 4 through a spacing ring, the fourth lens 4 is tightly matched with the fifth lens 5 through a spacing ring, and the fifth lens 5 is tightly matched with the sixth lens 6 through a soma.
Specifically, the first lens 1 is a biconcave negative power lens, the second lens 2 is a meniscus negative power lens, the third lens 3 is a biconvex positive power lens, the fourth lens 4 is a biconvex positive power lens, the fifth lens 5 is a biconcave negative power lens, the sixth lens 6 is a biconcave positive power lens, and the fourth lens 4 and the fifth lens 5 are cemented lenses by optical cementing. More specifically, the fourth lens 4 is a glass lens, the first lens 1, the second lens 2, the third lens 3, the fifth lens 5 and the sixth lens 6 are plastic aspheric lenses, and by setting a glass-five-plastic 1G5P glass-plastic mixed optical structure, the infrared ray can be corrected by the functions of plastic aspheric aberration elimination and glass lenses, so that the invention can reach 400 ten thousand pixels under visible light and infrared light, and meanwhile, the requirement on chip resolution is effectively reduced.
Further, the focal length of the athermalized high definition fixed focus lens and the third lens 3 and the fourth lens 4 satisfy the following relationship:
2.05<︱f3/f︱<2.25；
1.98<︱f4/f︱<2.15；
wherein f is a focal length of the athermalized high definition fixed focus lens, f3 is a focal length of the third lens 3, and f4 is a focal length of the fourth lens 4. Through the establishment of the relation, the invention can realize the functions of high pixel and optical compensation.
In addition, the lens focal lengths, refractive indices, and radius of curvature ranges of the first lens 1 to the sixth lens 6 are as follows:
| f1＝-4.8—-5.5 | n1＝1.45—1.65 | R1＝-24—-26.5 | R2＝3.05—3.45 |
| f2＝-26—-27.5 | n2＝1.55—1.75 | R3＝-3.05—-3.45 | R4＝-4.0—-5.0 |
| f3＝7.8—8.6 | n3＝1.45—1.65 | R5＝6.0-7.5 | R6＝-11.5—-13 |
| f4＝7.7—8.5 | n4＝1.45—1.65 | R7＝7.2—8.9 | R8＝-7.2—-8.9 |
| f5＝-5.2—-6.1 | n5＝1.55—1.75 | R9＝-21—-22 | R10＝4.1—5.1 |
| f6＝5.2—6.1 | n6＝1.45—1.65 | R11＝3.5—4.3 | R12＝-17.5—-18.8 |
wherein f1 to f6 correspond to focal lengths of the first lens 1 to the sixth lens 6, n1 to n6 correspond to refractive indexes of the first lens 1 to the sixth lens 6, and R is a radius of curvature.
Further, please refer to table 1 for parameters corresponding to the surface numbers of the first lens 1 to the sixth lens 6:
| face number | Surface type | | D | nd | |
| 1 | Spherical surface | -24.526 | 1.85 | 1.52 | |
| 2 | Spherical surface | 3.253 | 2.97 | ||
| 3 | Spherical surface | -3.35 | 1.18 | 1.62 | |
| 4 | Spherical surface | -4.535 | 0.05 | ||
| 5 | Spherical surface | 6.53 | 1.805 | 1.52 | |
| 6 | Spherical surface | -12.3 | 3.92 | ||
| Diaphragm surface | Plane surface | 0.1 | |||
| 8 | Spherical surface | 8.05 | 3.05 | 1.65 | |
| 9 | Spherical surface | -8.05 | 0.1 | ||
| 10 | Spherical surface | -21.53 | 0.68 | 1.65 | |
| 11 | Spherical surface | 4.55 | 0.06 | ||
| 12 | Spherical surface | 3.65 | 1.95 | 1.52 | |
| 13 | Spherical surface | -18.05 | 4.81 | ||
| 14 | Spherical surface | Plane surface | 0.7 | 1.52 | |
| 15 | Image plane | Plane surface |
TABLE 1
Wherein R is the radius of curvature of the center of the surface, D is the center thickness, and nd is the refractive index.
From the above description, it can be seen that the athermalized high-definition fixed focus lens of the present invention sequentially comprises: the lens comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5 and a sixth lens 6, wherein the first lens 1 is tightly matched with the second lens 2 through a soma, the second lens 2 is tightly matched with the third lens 3 through a spacing ring, the third lens 3 is tightly matched with the fourth lens 4 through a spacing ring, the fourth lens 4 is tightly matched with the fifth lens 5 through a spacing ring, and the fifth lens 5 is tightly matched with the sixth lens 6 through a soma; the fourth lens 4 is a glass lens, the first lens 1, the second lens 2, the third lens 3, the fifth lens 5 and the sixth lens 6 are plastic aspheric lenses, and the functions of eliminating aberration of plastic aspheric surfaces and correcting infrared rays of the glass lenses are fully utilized by using a glass-plastic mixed optical structure of five plastic lenses of one glass lens, so that 400 ten thousand pixels can be achieved under the conditions of F1.2 and visible light and infrared light, the use requirement of the invention on the resolution of a chip is reduced, the production cost is reduced under the condition of maintaining performance, and in addition, the functions of obtaining clear pictures under the low-illumination environment at night and avoiding focusing in the environment of-40 to +80 degrees are realized.
The above disclosure is illustrative of the preferred embodiments of the present invention and should not be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (4)
1. The athermalized high-definition fixed focus lens is characterized in that the athermalized high-definition fixed focus lens sequentially comprises: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the first lens is tightly matched with the second lens through a soma, the second lens is tightly matched with the third lens through a spacer, the third lens is tightly matched with the fourth lens through a spacer, the fourth lens is tightly matched with the fifth lens through a spacer, and the fifth lens is tightly matched with the sixth lens through a soma; the fourth lens is a glass lens, and the first lens, the second lens, the third lens, the fifth lens and the sixth lens are plastic aspheric lenses;
the focal length of the athermalized high definition fixed focus lens and the third lens and the fourth lens satisfy the following relationship:
2.05<︱f3/f︱<2.25；
1.98<︱f4/f︱<2.15；
wherein f is a focal length of the athermalized high-definition fixed focus lens, f3 is a focal length of the third lens, and f4 is a focal length of the fourth lens.
2. The athermalized high definition fixed focus lens according to claim 1, wherein said first lens is a negative power lens, said second lens is a negative power lens, said third lens is a positive power lens, said fourth lens is a positive power lens, said fifth lens is a negative power lens, and said sixth lens is a positive power lens.
3. The athermalized high definition fixed focus lens according to claim 1 or 2, wherein said fourth lens and said fifth lens are cemented optically into a cemented lens.
4. The athermalized high definition fixed lens of claim 1 wherein the first to sixth lenses have the following ranges of lens focal length, refractive index and radius of curvature:
the f1 to the f6 correspond to focal lengths of the first lens to the sixth lens, the n1 to the n6 correspond to refractive indexes of the first lens to the sixth lens, R is a radius of curvature, R1, R3, R5, R7, R9, R11 respectively correspond to a radius of curvature of a surface of the first lens to the sixth lens, which is close to an object side, and R2, R4, R6, R8, R10, R12 respectively correspond to a radius of curvature of a surface of the first lens to the sixth lens, which is far away from the object side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710385871.3A CN107037570B (en) | 2017-05-26 | 2017-05-26 | Athermalization high-definition prime lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710385871.3A CN107037570B (en) | 2017-05-26 | 2017-05-26 | Athermalization high-definition prime lens |
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| CN107037570A CN107037570A (en) | 2017-08-11 |
| CN107037570B true CN107037570B (en) | 2023-06-16 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108681050B (en) * | 2018-06-19 | 2019-12-03 | 江西联创电子有限公司 | Vehicle-mounted pick-up camera lens |
| CN110441888B (en) * | 2019-09-09 | 2024-03-12 | 东莞市宇瞳光学科技股份有限公司 | Fixed focus lens |
| CN111913292B (en) * | 2020-07-15 | 2022-06-28 | 深圳唯公生物科技有限公司 | Weak light collecting lens system and flow cytometry |
| CN113589480B (en) * | 2021-07-22 | 2023-04-28 | 东莞市长益光电有限公司 | High-low temperature resistant glass-plastic mixed fisheye lens with high cost performance |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07253540A (en) * | 1994-03-15 | 1995-10-03 | Hinode:Kk | Zoom lens |
| JP2014160107A (en) * | 2013-02-19 | 2014-09-04 | Nikon Corp | Optical system, optical device, and method for manufacturing optical system |
| CN105204140A (en) * | 2015-10-28 | 2015-12-30 | 东莞市宇瞳光学科技有限公司 | High-definition super wide angle prime lens |
| CN106597641A (en) * | 2017-01-22 | 2017-04-26 | 东莞市宇瞳光学科技股份有限公司 | Small-size low-cost 4MP athermalized prime lens |
| CN106707468A (en) * | 2016-12-27 | 2017-05-24 | 东莞市宇瞳光学科技股份有限公司 | Small high-definition athermal glass-plastic hybrid prime lens |
-
2017
- 2017-05-26 CN CN201710385871.3A patent/CN107037570B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07253540A (en) * | 1994-03-15 | 1995-10-03 | Hinode:Kk | Zoom lens |
| JP2014160107A (en) * | 2013-02-19 | 2014-09-04 | Nikon Corp | Optical system, optical device, and method for manufacturing optical system |
| CN105204140A (en) * | 2015-10-28 | 2015-12-30 | 东莞市宇瞳光学科技有限公司 | High-definition super wide angle prime lens |
| CN106707468A (en) * | 2016-12-27 | 2017-05-24 | 东莞市宇瞳光学科技股份有限公司 | Small high-definition athermal glass-plastic hybrid prime lens |
| CN106597641A (en) * | 2017-01-22 | 2017-04-26 | 东莞市宇瞳光学科技股份有限公司 | Small-size low-cost 4MP athermalized prime lens |
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Inventor after: Zhang Pinguang Inventor after: Li Zemin Inventor after: Liu Guanlu Inventor after: He Jianwei Inventor after: Mao Caiying Inventor before: Li Zemin |
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