CN104090349A - High-resolution day-night-dual-purpose CS connector prime lens - Google Patents
High-resolution day-night-dual-purpose CS connector prime lens Download PDFInfo
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- CN104090349A CN104090349A CN201410335285.4A CN201410335285A CN104090349A CN 104090349 A CN104090349 A CN 104090349A CN 201410335285 A CN201410335285 A CN 201410335285A CN 104090349 A CN104090349 A CN 104090349A
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Abstract
The invention relates to a high-resolution day-night-dual-purpose CS connector prime lens. A CS connector is used for a mechanical structure of the lens. According to an optical system of the lens, a front group A with the negative focal power and a back group B with the positive focal power are arranged in sequence in the light incidence direction of the optical system of the lens. The front group A is provided with a negative-crescent-shaped lens A-1 and a double-concave lens A-2 in sequence. The focal length fA of the front group A is equal to -8.66 mm. The back group B is provided with a double-convex lens B-1 and a gluing group formed by a double-convex lens B-2 and a double-concave lens B-3 in a tight-connecting mode. The focal length fB of the back group B is equal to 6.92 mm. The CS connector is used on the lens, the requirement for the CS connector from a client is met, the focal power of the front group A and the focal power of the back group B are reasonably distributed, the prime lens has the advantages of being low in distortion and large in relative aperture, broadband spectrum confocal performance is achieved, the resolution is higher than three million pixels, and the prime lens is a mainstream product of a minitype television surveillance image pickup system.
Description
Technical field
The present invention relates to a kind of optical pick-up apparatus of video technique, particularly a kind of high resolution day and night CS interface tight shot.
Background technology
The appearance of micro television CCTV camera and the application history of existing 20～30 years, have the micro pick-up lens of varied specifications and models supporting with it.Their performance index are very different, and great majority belong to low grade products, and performance index are low, only adapt to the common camera of 20～300,000 pixels; The spectral range adapting to is narrow, can only under light condition, use in the daytime of 480nm～700nm; Pattern distortion amount is large, and pattern distortion and the poor change of visions of reality picture are large, and authenticity is poor.
Summary of the invention
In order to adapt to the development of the high definition of miniature video camera, promote the image quality of miniature video camera system, improve the authenticity of picture, expand the range of application of miniature camera system, overcome low this defect of micro pick-up lens prior art performance index, the object of the invention is to provides that a kind of low distortion, object lens of large relative aperture, wide spectrum are confocal, resolution is better than 3,000,000 pixels, adopts the high resolution day and night CS interface tight shot of CS interface for miniature video camera system.
To achieve these goals, technical scheme of the present invention is: a kind of high resolution day and night CS interface tight shot, and the physical construction of described camera lens adopts CS interface; The optical system of described camera lens along light incident direction be provided with successively focal power for negative front group of A and focal power be rear group of positive B, described front group of A is provided with negative selenodont lens A-1 and biconcave lens A-2, the focal distance f of described front group of A successively
a=-8.66mm, the gummed group that described rear group of B is provided with successively biconvex lens B-1 and connected airtight by biconvex lens B-2 and biconcave lens B-3, the focal distance f of described rear group of B
b=6.92mm.
In further technical scheme, airspace between described front group of A and rear group of B is 4.8 ~ 4.90mm, negative selenodont lens A-1 in described front group of A and the airspace between biconcave lens A-2 are 0.31 ~ 0.38mm, and the biconvex lens B-1 in described rear group of B and the airspace between gummed group are 0.1 ~ 0.12mm.
In further technical scheme, the thickness of described negative selenodont lens A-1 is 1.50mm, and the thickness of described biconcave lens A-2 is 1.35mm, and the thickness of described biconvex lens B-1 is 2.05mm, the thickness of described biconvex lens B-2 is 3.8mm, and the thickness of described biconcave lens B-3 is 3.9mm.
In further technical scheme, described negative selenodont lens A-1 and biconcave lens A-2 all adopt the optical glass material of high refraction, low dispersion.
In further technical scheme, the physical construction of described camera lens comprises main cylinder and Connection Block, described optical system is arranged in main cylinder and is fastened by the trim ring of front end, described trim ring front end lateral wall is threaded and is withstood by jackscrew with main cylinder, between described biconcave lens A-2 and biconvex lens B-1, be provided with the first spacer ring, between described biconvex lens B-1 and biconvex lens B-2, be provided with the second spacer ring, described Connection Block front end side wall lock onto the limited ring groove on main cylinder by locking nail, described Connection Block rear inside wall is connected with thick bamboo tube rear end lateral wall clearance thread, described Connection Block rear end lateral wall is provided with CS interface, described Connection Block front end side wall is provided with the banking pin that the limited ring groove on main cylinder matches.
Compared with prior art, the present invention has the following advantages:
(1) adopt the retrofocus type structure of positive negative power separation, the focal distance f of front group of A
a=-8.66mm, the focal distance f of rear group of B
b=6.92mm, after two constituent element combinations, makes the posterior principal point reach of camera lens, and the rear cut-off distance of camera lens reaches 7.5mm.
(2) glass that the negative selenodont lens A-1 of front group of A and biconcave lens A-2 select high index of refraction, born very large focal power, make the oblique ray of wide-angle, after front group, " convergence ", reduces with the slanted angle of optical axis fast, through after organize after B refraction, the angle of chief ray and optical axis reduces, and makes camera lens realize good aberration correction, and makes the uniform-illumination of image planes.
(3) at rear group of biconvex lens B-2 that places drum type of camera lens, effectively utilize the aberration that it carrys out corrective lens, make the resolution of camera lens up to 3,000,000 pixels.
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Accompanying drawing explanation
Fig. 1 is the optical system diagram of the embodiment of the present invention.
Fig. 2 is the mechanical construction drawing of the embodiment of the present invention.
In figure: group A before A-, A-1-bears selenodont lens A-1, and A-2-biconcave lens A-2, organizes B after B-, B-1-biconvex lens B-1, B-2-biconvex lens B-2, B-3-biconcave lens B-3, O-image planes; The main cylinder of 1-, 2-BC spacer ring, 3-CD spacer ring, trim ring after 4-, 5-bears selenodont lens A-1,6-biconcave lens A-2,7-biconvex lens B-1,8-biconvex lens B-2,9-biconcave lens B-3.
Embodiment
As shown in Figure 1, a kind of high resolution day and night CS interface tight shot, the physical construction of described camera lens adopts CS interface; The optical system of described camera lens along light incident direction be provided with successively focal power for negative front group of A and focal power be rear group of positive B, described front group of A is provided with negative selenodont lens A-1 and biconcave lens A-2, the focal distance f of described front group of A successively
a=-8.66mm, the gummed group that described rear group of B is provided with successively biconvex lens B-1 and connected airtight by biconvex lens B-2 and biconcave lens B-3, the focal distance f of described rear group of B
b=6.92mm.
In the present embodiment, airspace between described front group of A and rear group of B is 4.8 ~ 4.90mm, negative selenodont lens A-1 in described front group of A and the airspace between biconcave lens A-2 are 0.31 ~ 0.38mm, and the biconvex lens B-1 in described rear group of B and the airspace between gummed group are 0.1 ~ 0.12mm.
In the present embodiment, the thickness of described negative selenodont lens A-1 is 1.50mm, and the thickness of described biconcave lens A-2 is 1.35mm, and the thickness of described biconvex lens B-1 is 2.05mm, the thickness of described biconvex lens B-2 is 3.8mm, and the thickness of described biconcave lens B-3 is 3.9mm.
In the present embodiment, the optical system consisting of above-mentioned lens set has reached following optical index: (1) focal length: f '=12mm; (2) relative aperture F=1.6; (3) field angle: 2w≤35 °; (4) resolution: can be adaptive with 3,000,000 pixel high-resolution CCD or cmos camera; (5) light path overall length ∑≤23mm, optics rear cut-off distance l ' >=7.5mm; (6) applicable spectral line scope: 480nm～850nm.
The present invention, when optical design, carries out aberration correction and balance to the wide spectral range of 485～850nm, makes camera lens all have good picture element at wide spectral range, has realized wide spectrum confocal.Like this camera lens can not only photoenvironment in the daytime under blur-free imaging, under night utmost point low-light (level) environment, by infrared light filling, also can blur-free imaging.Negative selenodont lens A-1 of the present invention and biconcave lens A-2 select the optical glass material of high refraction, low dispersion, the various aberrations of having proofreaied and correct optical lens by computer optics Computer Aided Design and optimization make camera lens realize high resolving power, more meet the requirement of high definition video shooting, be applicable to the shooting of panorama machine.
As shown in Figure 2, the physical construction of described camera lens comprises main cylinder and Connection Block, described optical system is arranged in main cylinder and is fastened by the trim ring of front end, described trim ring front end lateral wall is threaded and is withstood by jackscrew with main cylinder, between described biconcave lens A-2 and biconvex lens B-1, be provided with the first spacer ring, between described biconvex lens B-1 and biconvex lens B-2, be provided with the second spacer ring, described Connection Block front end side wall lock onto the limited ring groove on main cylinder by locking nail, described Connection Block rear inside wall is connected with thick bamboo tube rear end lateral wall clearance thread, described Connection Block rear end lateral wall is provided with CS interface, described Connection Block front end side wall is provided with the banking pin that the limited ring groove on main cylinder matches.
In the present embodiment, being mounted with property and the stability that guarantees whole eyeglasses that coordinates of described trim ring and main cylinder, described jackscrew guarantees stationarity and the stability of trim ring assembling, described the first spacer ring and the second spacer ring guarantee the logical light of its eyeglass and the air distance between eyeglass, described locking nail guarantees stationarity and the stability of lens focus, described Connection Block coordinates and plays micro-focusing action with clearance thread between main cylinder, the interface 1 of described Connection Block standard configuration " x (1/32) " guarantees and video camera perfect cooperation, the scope that the engagement limits Connection Block of described banking pin and main cylinder moves comes off to prevent Connection Block.
In the present embodiment, the plane that the spacer ring of assurance eyeglass airspace contacts with eyeglass will have accurate verticality to guarantee the accuracy of eyeglass assembling; While designing main cylinder, endoporus internal diameter size is carried out to strict size Control, it is coordinated closely with eyeglass, reach the right alignment of eyeglass installation requirement and the consistance of lens light axis, and have strict size and status requirement on main cylinder.Structure of the present invention is light and handy, meets the principle that overall volume is little, exquisite, and in order to coordinate compactness, can adopt numerical control processing technology, guarantees the accuracy of its precision.
The present invention is when structural design, both guaranteed camera lens concentricity, precision and axial location accurately, make again structural design compactness small and exquisite (overall dimensions Ф 30mm * 21.6mm), can be applicable to the occasion that structure is compacter, such as small-sized ball machine etc., its applicable surface is wider.Wherein all constitutional details adopt NC super machining technique, meet the strict demand of optical design to air distance, make the compact conformation of camera lens, meet the demand of client to CS interface.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. a high resolution day and night CS interface tight shot, is characterized in that: the physical construction of described camera lens adopts CS interface; The optical system of described camera lens along light incident direction be provided with successively focal power for negative front group of A and focal power be rear group of positive B, described front group of A is provided with negative selenodont lens A-1 and biconcave lens A-2, the focal distance f of described front group of A successively
a=-8.66mm, the gummed group that described rear group of B is provided with successively biconvex lens B-1 and connected airtight by biconvex lens B-2 and biconcave lens B-3, the focal distance f of described rear group of B
b=6.92mm.
2. high resolution day and night CS interface tight shot according to claim 1, it is characterized in that: the airspace between described front group of A and rear group of B is 4.8 ~ 4.90mm, negative selenodont lens A-1 in described front group of A and the airspace between biconcave lens A-2 are 0.31 ~ 0.38mm, and the biconvex lens B-1 in described rear group of B and the airspace between gummed group are 0.1 ~ 0.12mm.
3. high resolution day and night CS interface tight shot according to claim 1 and 2, it is characterized in that: the thickness of described negative selenodont lens A-1 is 1.50mm, the thickness of described biconcave lens A-2 is 1.35mm, the thickness of described biconvex lens B-1 is 2.05mm, the thickness of described biconvex lens B-2 is 3.8mm, and the thickness of described biconcave lens B-3 is 3.9mm.
4. high resolution day and night CS interface tight shot according to claim 1 and 2, is characterized in that: described negative selenodont lens A-1 and biconcave lens A-2 all adopt the optical glass material of high refraction, low dispersion.
5. high resolution day and night CS interface tight shot according to claim 1, it is characterized in that: the physical construction of described camera lens comprises main cylinder and Connection Block, described optical system is arranged in main cylinder and is fastened by the trim ring of front end, described trim ring front end lateral wall is threaded and is withstood by jackscrew with main cylinder, between described biconcave lens A-2 and biconvex lens B-1, be provided with the first spacer ring, between described biconvex lens B-1 and biconvex lens B-2, be provided with the second spacer ring, described Connection Block front end side wall lock onto the limited ring groove on main cylinder by locking nail, described Connection Block rear inside wall is connected with thick bamboo tube rear end lateral wall clearance thread, described Connection Block rear end lateral wall is provided with CS interface, described Connection Block front end side wall is provided with the banking pin that the limited ring groove on main cylinder matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335285.4A CN104090349B (en) | 2014-07-15 | 2014-07-15 | High resolution day and night CS interface tight shot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335285.4A CN104090349B (en) | 2014-07-15 | 2014-07-15 | High resolution day and night CS interface tight shot |
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| CN104090349A true CN104090349A (en) | 2014-10-08 |
| CN104090349B CN104090349B (en) | 2016-05-25 |
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| CN201410335285.4A Active CN104090349B (en) | 2014-07-15 | 2014-07-15 | High resolution day and night CS interface tight shot |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105460425A (en) * | 2015-12-25 | 2016-04-06 | 福建福光股份有限公司 | Bubble housing for lenses and use method of bubble housing |
| CN112099176A (en) * | 2020-09-01 | 2020-12-18 | Oppo广东移动通信有限公司 | Lens barrel, lens assembly, camera module and electronic device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1403844A (en) * | 2001-08-24 | 2003-03-19 | 佳能株式会社 | Lens system and camera with the same system |
| JP2008040033A (en) * | 2006-08-04 | 2008-02-21 | Sigma Corp | Wide-angle lens |
| US20120075722A1 (en) * | 2010-09-29 | 2012-03-29 | Fujifilm Corporation | Lens for projection and projection-type display apparatus |
| TW201413319A (en) * | 2012-09-26 | 2014-04-01 | Sintai Optical Shenzhen Co Ltd | Slim lens assembly |
| CN203950066U (en) * | 2014-07-15 | 2014-11-19 | 福建福光数码科技有限公司 | High resolution day and night CS interface tight shot |
-
2014
- 2014-07-15 CN CN201410335285.4A patent/CN104090349B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1403844A (en) * | 2001-08-24 | 2003-03-19 | 佳能株式会社 | Lens system and camera with the same system |
| JP2008040033A (en) * | 2006-08-04 | 2008-02-21 | Sigma Corp | Wide-angle lens |
| US20120075722A1 (en) * | 2010-09-29 | 2012-03-29 | Fujifilm Corporation | Lens for projection and projection-type display apparatus |
| TW201413319A (en) * | 2012-09-26 | 2014-04-01 | Sintai Optical Shenzhen Co Ltd | Slim lens assembly |
| CN203950066U (en) * | 2014-07-15 | 2014-11-19 | 福建福光数码科技有限公司 | High resolution day and night CS interface tight shot |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105460425A (en) * | 2015-12-25 | 2016-04-06 | 福建福光股份有限公司 | Bubble housing for lenses and use method of bubble housing |
| CN112099176A (en) * | 2020-09-01 | 2020-12-18 | Oppo广东移动通信有限公司 | Lens barrel, lens assembly, camera module and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104090349B (en) | 2016-05-25 |
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Address after: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Applicant after: FUJIAN FORECAM CO., LTD. Address before: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Applicant before: Fujian Forecam Optics Co., Ltd. |
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