CN107329236B - Large-view-field anti-stray-light image pickup lens with anti-fog function - Google Patents
Large-view-field anti-stray-light image pickup lens with anti-fog function Download PDFInfo
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- CN107329236B CN107329236B CN201710686904.8A CN201710686904A CN107329236B CN 107329236 B CN107329236 B CN 107329236B CN 201710686904 A CN201710686904 A CN 201710686904A CN 107329236 B CN107329236 B CN 107329236B
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- biconvex
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- crescent
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
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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
- G02B13/04—Reversed telephoto objectives
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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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
Abstract
The invention relates to a large-view-field anti-stray-light image pickup lens with an anti-fog function, wherein the optical structure of the lens comprises a protection plate, a front lens group A, a diaphragm B, a rear lens group C and a color filter which are sequentially arranged along the light incidence direction; the front lens group A is composed of a negative crescent lens A-1, a positive crescent lens A-2, a negative crescent lens A-3, a positive crescent lens A-4 and a biconvex lens A-5 which are arranged in sequence; the rear lens group C consists of a biconcave lens C-1, a biconvex lens C-2 and a biconvex lens C-3 which are arranged in sequence; the rear surface of the protection plate is plated with an ITO protection film. The invention has the beneficial effects that: the antifogging function is realized by electrifying and heating the conductive film plated on the protection plate, and the antifogging device has the characteristics of small volume and light weight.
Description
Technical Field
The invention relates to a large-view-field anti-stray-light image pickup lens with an anti-fog function,
background
The camera lens is classified into a general lens and a special lens according to its function and operation method. The commonly used lenses are further classified into fixed focus lenses (automatic and manual apertures) and zoom lenses (automatic and manual apertures). The special lens is specially designed according to a special working environment, and generally comprises a wide-angle lens, a pinhole lens and the like. Aiming at different special working environments, the lens needs to be correspondingly designed in a protective way: under the high-temperature high-pressure vibration environment, the lens needs to be subjected to high-temperature high-pressure resistant and vibration resistant design; under the humid and wet-cold environment, the lens needs to be subjected to watertight protection design and antifogging design; in a strong light environment, a light shield needs to be designed for the lens to avoid the influence of stray light. Generally used lenses only need one or two protective designs at most, but under some extremely severe environmental conditions, multiple protective designs need to be carried out, and the comprehensive performance of the camera lenses is improved to meet the use requirements.
Disclosure of Invention
Aiming at the defects, the invention provides the large-view-field anti-stray light image pickup lens with the anti-fog function, so that the anti-fog function is realized.
The technical scheme adopted by the invention for solving the technical problems is as follows: a large-view-field anti-stray light image pick-up lens with an anti-fog function is disclosed, wherein the optical structure of the lens comprises a protection plate, a front lens group A, a diaphragm B, a rear lens group C and a color filter which are sequentially arranged along the incident direction of light; the front lens group A is composed of a negative crescent lens A-1, a positive crescent lens A-2, a negative crescent lens A-3, a positive crescent lens A-4 and a biconvex lens A-5 which are arranged in sequence; the rear lens group C consists of a biconcave lens C-1, a biconvex lens C-2 and a biconvex lens C-3 which are arranged in sequence; the rear surface of the protection plate is plated with an ITO protection film.
Further, the air space between the protective sheet and the front lens group a is 3.76mm, the air space between the front lens group a and the diaphragm B is 0.30mm, the air space between the diaphragm B and the rear lens group C is 0.63mm, and the air space between the rear lens group C and the color filter is 0.20 mm.
Further, in the front lens group A, the air space between the negative crescent lens A-1 and the positive crescent lens A-2 is 2.79mm, the air space between the positive crescent lens A-2 and the negative crescent lens A-3 is 0.15mm, the air space between the negative crescent lens A-3 and the positive crescent lens A-4 is 3.82mm, and the air space between the positive crescent lens A-4 and the biconvex lens A-5 is 3.66 mm; in the rear lens group C, the air space between the biconcave lens C-1 and the biconvex lens C-2 is 0.80mm, and the air space between the biconvex lens C-2 and the biconvex lens C-3 is 0.12 mm.
Further, the protection sheet is made of quartz glass.
Compared with the prior art, the invention has the following beneficial effects:
(1) the adoption of the anti-far-distance optical structure is beneficial to the increase of the field angle of the system, the optimization of various aberrations, the emphasis correction of off-axis aberrations, the small distortion of the system and the good imaging quality;
(2) the protection plate is made of quartz glass with high hardness and good chemical stability, and simultaneously has an ITO conductive film plated on the surface, and has an anti-fog function after being electrified and heated.
Drawings
The invention is further described with reference to the following figures.
Fig. 1 is a schematic view of an optical structure of a lens barrel according to an embodiment of the invention.
Fig. 2 is a general view of mechanical assembly of the lens barrel according to the embodiment of the present invention.
In the figure: 31-front protective mirror cover; 32-front protective sheet press ring; 33-a main barrel; 34-A sheet pressing ring; 35-AB space ring; 36-BC space ring; a 37-CD spacer; 38-DE space ring; 39-FG space ring; 310-GH space ring; 311-H spacing rings; 312-rear protection sheet press ring; 313-color filter; 323-front protective glasses; 324-front protective mirror cover lens; 325-pressing ring of front protective lens cover.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1-2, the optical structure of the large-field anti-glare imaging lens with an anti-fog function according to the present embodiment includes a protection sheet, a front lens group a, a diaphragm B, a rear lens group C, and a color filter 313, which are sequentially arranged along a light incident direction; the front lens group A is composed of a negative crescent lens A-1, a positive crescent lens A-2, a negative crescent lens A-3, a positive crescent lens A-4 and a biconvex lens A-5 which are arranged in sequence; the rear lens group C consists of a biconcave lens C-1, a biconvex lens C-2 and a biconvex lens C-3 which are arranged in sequence; the rear surface of the protection plate is plated with an ITO protection film.
In this example, the air space between the protective sheet and the front lens group a was 3.76mm, the air space between the front lens group a and the stop B was 0.30mm, the air space between the stop B and the rear lens group C was 0.63mm, and the air space between the rear lens group C and the color filter was 0.20 mm.
In this embodiment, in the front lens group a, the air space between the negative crescent lens a-1 and the positive crescent lens a-2 is 2.79mm, the air space between the positive crescent lens a-2 and the negative crescent lens a-3 is 0.15mm, the air space between the negative crescent lens a-3 and the positive crescent lens a-4 is 3.82mm, and the air space between the positive crescent lens a-4 and the biconvex lens a-5 is 3.66 mm; in the rear lens group C, the air space between the biconcave lens C-1 and the biconvex lens C-2 is 0.80mm, and the air space between the biconvex lens C-2 and the biconvex lens C-3 is 0.12 mm.
In this embodiment, the protective sheet is made of quartz glass. Meanwhile, the rear surface of the protection plate is plated with an ITO conductive film, so that the anti-fog function can be realized by electrifying and heating.
The optical system adopts a reverse long-distance structure, which is beneficial to the increase of the field angle.
In the large-view-field anti-glare camera lens with the anti-fog function provided by the embodiment, each lens needs to meet the parameter requirements shown in table 1.
TABLE 1 lens parameter table
The optical indexes of the optical fiber array are that the spectral range is 450 nm-650 nm, the focal length f' =2mm, the relative aperture is 1/3.5, the field angle is 75 degrees × 62.5.5 degrees, the pixel size is 4.2 mu m × 4.2.2 mu m, the distortion is less than 4%, the MTF value is 0.57 of the central field of view at 120lp/mm, 0.7 of the field of view is 0.50, and the size is phi 38mm × 40 mm.
The mechanical structure of the lens of the present invention is shown in fig. 2, and the mechanical structure of the lens includes a front protective lens cover 31, a front protective lens pressing ring 32, a main lens barrel 33, an a-piece pressing ring 34, an AB space ring 35, a BC space ring 36, a CD space ring 37, a DE space ring 38, an FG space ring 39, a GH space ring 310, an H-piece space ring 311, a rear protective lens pressing ring 312, a front protective lens 323, a front protective lens cover lens 324, and a front protective lens cover pressing ring 325. Along the incident direction of light rays from left to right, the front protection plate, the negative crescent lens A-1, the positive crescent lens A-2, the negative crescent lens A-3, the positive crescent lens A-4, the biconvex lens A-5, the biconcave lens C-1, the biconvex lens C-2 and the biconvex lens C-3 are respectively arranged in the main lens cone 33. Wherein the front lens group A is pressed tightly on the main lens cone through an A-piece pressing ring 34, an AB space ring 35 is arranged between the negative crescent lens A-1 and the positive crescent lens A-2, a BC space ring 36 is arranged between the positive crescent lens A-2 and the negative crescent lens A-3, a CD space ring 37 is arranged between the negative crescent lens A-3 and the positive crescent lens A-4, a DE space ring 38 is arranged between the positive crescent lens A-4 and the biconvex lens A-5, a diaphragm spacing ring 317 is arranged between the biconvex lens A-5 and the biconcave lens C-1, the rear lens group C is tightly pressed in the main lens cone through a rear protection sheet pressing ring 312, an FG spacer ring 39 is arranged between the biconcave lens C-1 and the biconvex lens C-2, and a GH spacing ring 310 is arranged between the biconvex lens C-2 and the biconvex lens C-3. The main lens cone of the invention uses titanium alloy material, so that the lens has the capability of resisting high temperature, high pressure and vibration, simultaneously, the watertight protection design is carried out, and the lens structure is designed to resist stray light, and the excellent stray light resisting function can be realized without a lens hood;
in conclusion, the large-view-field anti-stray-light image pickup lens with the anti-fog function provided by the invention realizes the anti-fog function and has the characteristics of small volume and light weight.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The utility model provides an anti miscellaneous light camera lens of big visual field with antifog function which characterized in that: the optical structure of the lens comprises a protective sheet, a front lens group A, a diaphragm B, a rear lens group C and a color filter which are sequentially arranged along the incident direction of light rays; the front lens group A is composed of a negative crescent lens A-1, a positive crescent lens A-2, a negative crescent lens A-3, a positive crescent lens A-4 and a biconvex lens A-5 which are arranged in sequence; the rear lens group C consists of a biconcave lens C-1, a biconvex lens C-2 and a biconvex lens C-3 which are arranged in sequence; the rear surface of the protection plate is plated with an ITO protection film; the air space between the protective sheet and the front lens group A is 3.76mm, the air space between the front lens group A and the diaphragm B is 0.30mm, the air space between the diaphragm B and the rear lens group C is 0.63mm, and the air space between the rear lens group C and the color filter is 0.20 mm; in the front lens group A, the air space between the negative crescent lens A-1 and the positive crescent lens A-2 is 2.79mm, the air space between the positive crescent lens A-2 and the negative crescent lens A-3 is 0.15mm, the air space between the negative crescent lens A-3 and the positive crescent lens A-4 is 3.82mm, and the air space between the positive crescent lens A-4 and the biconvex lens A-5 is 3.66 mm; in the rear lens group C, the air space between the biconcave lens C-1 and the biconvex lens C-2 is 0.80mm, and the air space between the biconvex lens C-2 and the biconvex lens C-3 is 0.12 mm; the protective sheet is made of quartz glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710686904.8A CN107329236B (en) | 2017-08-11 | 2017-08-11 | Large-view-field anti-stray-light image pickup lens with anti-fog function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710686904.8A CN107329236B (en) | 2017-08-11 | 2017-08-11 | Large-view-field anti-stray-light image pickup lens with anti-fog function |
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| CN107329236A CN107329236A (en) | 2017-11-07 |
| CN107329236B true CN107329236B (en) | 2020-06-26 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108254882A (en) * | 2018-02-06 | 2018-07-06 | 中国科学院西安光学精密机械研究所 | Ultra-large vision field pin hole optical imaging system |
| CN109061983B (en) * | 2018-09-06 | 2023-11-17 | 福建福光股份有限公司 | Visible light lens with four-gear energy adjusting function and working method thereof |
Citations (9)
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|---|---|---|---|---|
| JPS6474519A (en) * | 1987-09-16 | 1989-03-20 | Minolta Camera Kk | Zoom lens |
| JPS6474517A (en) * | 1987-09-16 | 1989-03-20 | Minolta Camera Kk | Zoom lens |
| JP3668365B2 (en) * | 1997-10-14 | 2005-07-06 | オリンパス株式会社 | Zoom lens |
| JP2007240747A (en) * | 2006-03-07 | 2007-09-20 | Olympus Imaging Corp | Zoom lens and imaging device using the same |
| EP1837693A1 (en) * | 2006-03-23 | 2007-09-26 | Nikon Corporation | Retrofocus lens system and image-taking device |
| CN202837649U (en) * | 2012-08-27 | 2013-03-27 | 福建福光数码科技有限公司 | High speed shooting camera lens |
| CN202904110U (en) * | 2012-08-27 | 2013-04-24 | 福建福光数码科技有限公司 | Low-distortion high-resolution day and night dual-purpose miniature pick-up lens |
| CN103389562A (en) * | 2013-08-15 | 2013-11-13 | 福建福光数码科技有限公司 | 5 mega-pixel micro camera lens with large target surface |
| CN106131383A (en) * | 2016-07-18 | 2016-11-16 | 信利光电股份有限公司 | A kind of camera module and electronic equipment |
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2017
- 2017-08-11 CN CN201710686904.8A patent/CN107329236B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6474519A (en) * | 1987-09-16 | 1989-03-20 | Minolta Camera Kk | Zoom lens |
| JPS6474517A (en) * | 1987-09-16 | 1989-03-20 | Minolta Camera Kk | Zoom lens |
| JP3668365B2 (en) * | 1997-10-14 | 2005-07-06 | オリンパス株式会社 | Zoom lens |
| JP2007240747A (en) * | 2006-03-07 | 2007-09-20 | Olympus Imaging Corp | Zoom lens and imaging device using the same |
| EP1837693A1 (en) * | 2006-03-23 | 2007-09-26 | Nikon Corporation | Retrofocus lens system and image-taking device |
| CN202837649U (en) * | 2012-08-27 | 2013-03-27 | 福建福光数码科技有限公司 | High speed shooting camera lens |
| CN202904110U (en) * | 2012-08-27 | 2013-04-24 | 福建福光数码科技有限公司 | Low-distortion high-resolution day and night dual-purpose miniature pick-up lens |
| CN103389562A (en) * | 2013-08-15 | 2013-11-13 | 福建福光数码科技有限公司 | 5 mega-pixel micro camera lens with large target surface |
| CN106131383A (en) * | 2016-07-18 | 2016-11-16 | 信利光电股份有限公司 | A kind of camera module and electronic equipment |
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