CN104090351B - Wide spectral day and night Large visual angle monitoring camera - Google Patents
Wide spectral day and night Large visual angle monitoring camera Download PDFInfo
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- CN104090351B CN104090351B CN201410335276.5A CN201410335276A CN104090351B CN 104090351 B CN104090351 B CN 104090351B CN 201410335276 A CN201410335276 A CN 201410335276A CN 104090351 B CN104090351 B CN 104090351B
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Abstract
The present invention relates to a kind of wide spectral day and night Large visual angle monitoring camera, be provided with along light direction in the optical system of described camera lens that focal power is negative biconcave lens A, diaphragm B successively, focal power is positive biconvex lens C, focal power is positive biconvex lens D, focal power is negative meniscus lens E and parallel plate F, wherein focal power is positive biconvex lens D and focal power is that negative meniscus lens E forms one group of balsaming lens.Optical lens of the present invention all adopts the low dispersion of sphere, common material, few impurity, on the basis of pursuing monitoring range, imaging definition, high resolving power, environmental suitability, reaches more efficient technique and lower cost; Meanwhile, even if under the environment or night environment of low-light (level), image also can be made to reach high-quality, i.e. mega pixel; Household indoor can be widely used in, in elevator cage, the little sighting distance place with great visual angle such as vehicle-mounted monitoring, be the main product of Imaging for Monitoring system.
Description
Technical field
The present invention relates to a kind of optical imaging system, especially a kind of wide spectral day and night Large visual angle camera lens.
Background technology
Along with the development of security protection industry and the increasingly mature of monitoring technique, the demand of camera lens and quality are improved constantly.At present, tight shot mostly is 5 to 8, no matter product on market is proposed more requirement in various aspects such as monitoring range, imaging definition, high resolving power, environmental suitabilities, and constantly pursues more efficient technique, lower cost on this basis.
Summary of the invention
The object of the present invention is to provide a kind of wide spectral day and night Large visual angle monitoring camera using as far as possible few eyeglass to realize day and night confocal and Large visual angle.
To achieve these goals, technical scheme of the present invention is: a kind of wide spectral day and night Large visual angle monitoring camera, be provided with along light direction in the optical system of described camera lens that focal power is negative biconcave lens A, diaphragm B successively, focal power is positive biconvex lens C, focal power is positive biconvex lens D, focal power is negative meniscus lens E and parallel plate F, wherein focal power is positive biconvex lens D and focal power is that negative meniscus lens E forms one group of balsaming lens.
Further, the airspace of described biconcave lens A and biconvex lens C is 8.43 ~ 8.51mm, and the airspace of described biconvex lens C and balsaming lens is 2.8 ~ 2.83mm.
Further, the focal length of described biconcave lens A is-1.479mm<f<-0.369mm, radius-of-curvature is-36mm<R1<-37mm and 3mm<R2<4mm, and thickness is 1mm<D<2mm.
Further, the focal length of described biconvex lens C is 0.218mm<f<0.875mm, radius-of-curvature is 7mm<R1<8mm and-24mm<R2<-25mm, and thickness is 1mm<D<2mm.
Further, the focal length of described biconvex lens D is 0.599mm<f<2.398mm, radius-of-curvature is 7mm<R1<8mm and-2mm<R2<-3mm, and thickness is 1mm<D<2mm.
Further, the focal length of described meniscus lens E is-1.355mm<f<-0.338mm, radius-of-curvature is for being-2mm<R1<-3mm and-14mm<R2<-15mm, and thickness is 0<D<1mm.
The present invention has the following advantages: its optical lens all adopts the low dispersion of sphere, common material, few impurity, on the basis of pursuing monitoring range, imaging definition, high resolving power, environmental suitability, reach more efficient technique and lower cost; Meanwhile, even if under the environment or night environment of low-light (level), image also can be made to reach high-quality, i.e. mega pixel; Household indoor can be widely used in, in elevator cage, the little sighting distance place with great visual angle such as vehicle-mounted monitoring, be the main product of Imaging for Monitoring system.
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: A-biconcave lens A, B-diaphragm B, C-biconvex lens C, D-biconvex lens D, E-meniscus lens E, F-parallel plate F; 1-tight loop, 2-first spacer ring, 3-second spacer ring, 4-body tube.
Embodiment
As shown in Figure 1, a kind of wide spectral day and night Large visual angle monitoring camera, be provided with along light direction (from object plane to image planes) in the optical system of described camera lens that focal power is negative biconcave lens A, diaphragm B successively, focal power is positive biconvex lens C, focal power is positive biconvex lens D, focal power is negative meniscus lens E and parallel plate F, wherein focal power is positive biconvex lens D and focal power is that negative meniscus lens E forms one group of balsaming lens.
In the present embodiment, the airspace of described biconcave lens A and biconvex lens C is 8.43 ~ 8.51mm, and the airspace of described biconvex lens C and balsaming lens is 2.8 ~ 2.83mm.The focal length of the multiple eyeglass of this camera lens, radius-of-curvature and thickness meet lower surface condition respectively.
In the present embodiment, the optical system be made up of above-mentioned lens set reaches following technical indicator: (1) focal length: f '=2.8mm; (2) relative aperture F=2; (3) field angle: 2w >=120 °; (4) resolution: can be adaptive with mega pixel high-resolution CCD or cmos camera; (5) light path overall length ∑≤22mm; (6) optics rear cut-off distance l ' >=5.5mm; (7) spectral line scope: 440nm ~ 940nm is suitable for; (8) image planes size: 1/4 "; (9) working temperature :-20 DEG C to 60 DEG C.
In optical design, visible spectral regions, at 440nm-940nm, under the condition guaranteeing Large visual angle angle, corrects wave aberration, system is achieved day and night confocal, namely confocal in spectral range 440nm-940nm; To achieve at night by infrared lamp light filling, the imaging picture element of mega pixel can be obtained.
As shown in Figure 2, the physical construction of this camera lens comprises body tube 4, by biconcave lens A, biconvex lens C, biconvex lens D and meniscus lens E is assemblied in body tube 4, by the tight loop 1 of front end, 4 eyeglasses are fixed in body tube 4 to ensure the steadiness that whole camera lens assembles and logical light, airspace between biconcave lens A and biconvex lens C and logical light is ensured by the first spacer ring 2, airspace between biconvex lens C and balsaming lens and logical light is ensured by the second spacer ring 3, second spacer ring 3 and body tube 4 ensure the depth of parallelism of balsaming lens and body tube 4, and ensure the alignment of each eyeglass and center on optical axis.
The present invention not only accurately ensures the machining precision of eyeglass and mechanical parts, make camera lens in assembling process each center of lens on same optical axis.And through optimization and perfect, even if make the eyeglass in tolerance limit position and mechanical parts also can reach good imaging effect.Wherein the design of physical construction is on the basis rationally arranging delustring line (as the first spacer ring 2, second spacer ring 3), constantly simplifies the difficulty of processing of mechanical parts, reduces costs, and improves precision.
The foregoing is only preferred embodiment of the present invention, all equalizations done 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 wide spectral day and night Large visual angle monitoring camera, it is characterized in that: be provided with along light direction in the optical system of described camera lens that focal power is negative biconcave lens A, diaphragm B successively, focal power is positive biconvex lens C, focal power is positive biconvex lens D, focal power is negative meniscus lens E and parallel plate F, wherein focal power is positive biconvex lens D and focal power is that negative meniscus lens E forms one group of balsaming lens; The airspace of described biconcave lens A and biconvex lens C is 8.43 ~ 8.51mm, and the airspace of described biconvex lens C and balsaming lens is 2.8 ~ 2.83mm.
2. wide spectral day and night Large visual angle monitoring camera according to claim 1, it is characterized in that: the focal length of described biconcave lens A is-1.479mm<f<-0.369mm, incident side radius-of-curvature is-36mm<R1<-37mm, light emission side radius-of-curvature is 3mm<R2<4mm, and thickness is 1mm<D<2mm.
3. wide spectral day and night Large visual angle monitoring camera according to claim 1, it is characterized in that: the focal length of described biconvex lens C is 0.218mm<f<0.875mm, incident side radius-of-curvature is 7mm<R1<8mm, light emission side radius-of-curvature is-24mm<R2<-25mm, and thickness is 1mm<D<2mm.
4. wide spectral day and night Large visual angle monitoring camera according to claim 1, it is characterized in that: the focal length of described biconvex lens D is 0.599mm<f<2.398mm, incident side radius-of-curvature is 7mm<R1<8mm, light emission side radius-of-curvature is-2mm<R2<-3mm, and thickness is 1mm<D<2mm.
5. wide spectral day and night Large visual angle monitoring camera according to claim 1, it is characterized in that: the focal length of described meniscus lens E is-1.355mm<f<-0.338mm, incident side radius-of-curvature is for being-2mm<R1<-3mm, light emission side radius-of-curvature is-14mm<R2<-15mm, and thickness is 0<D<1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335276.5A CN104090351B (en) | 2014-07-15 | 2014-07-15 | Wide spectral day and night Large visual angle monitoring camera |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410335276.5A CN104090351B (en) | 2014-07-15 | 2014-07-15 | Wide spectral day and night Large visual angle monitoring camera |
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| CN104090351A CN104090351A (en) | 2014-10-08 |
| CN104090351B true CN104090351B (en) | 2016-04-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104678535B (en) * | 2015-02-11 | 2017-02-01 | 福建福光股份有限公司 | High-resolution day and night dual-purpose economic miniature lens |
| CN105182506B (en) * | 2015-10-13 | 2017-10-03 | 福建福光股份有限公司 | 2.6mm focusing wide angle camera lenses |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4374853B2 (en) * | 2002-12-27 | 2009-12-02 | 株式会社ニコン | Anti-shake zoom lens |
| JP4623993B2 (en) * | 2003-04-22 | 2011-02-02 | オリンパス株式会社 | Imaging optical system and electronic apparatus using the same |
| WO2013018316A1 (en) * | 2011-07-29 | 2013-02-07 | 富士フイルム株式会社 | Imaging lens and imaging device |
| CN103513400B (en) * | 2013-08-29 | 2016-01-06 | 利达光电股份有限公司 | A kind of wide-angle high-resolution pick-up lens |
| CN204009205U (en) * | 2014-07-15 | 2014-12-10 | 福建福光数码科技有限公司 | The large visual field of wide spectrum day and night monitoring camera |
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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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