CN205318004U - Big confocal camera lens of light day night that leads to of 4mm focus wide angle - Google Patents
Big confocal camera lens of light day night that leads to of 4mm focus wide angle Download PDFInfo
- Publication number
- CN205318004U CN205318004U CN201521090761.7U CN201521090761U CN205318004U CN 205318004 U CN205318004 U CN 205318004U CN 201521090761 U CN201521090761 U CN 201521090761U CN 205318004 U CN205318004 U CN 205318004U
- Authority
- CN
- China
- Prior art keywords
- lens
- group
- camera lens
- light
- wide angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model relates to a big confocal camera lens of light day night that leads to of 4mm focus wide angle, it is the positive back B of group for the preceding A of group of burden, smooth fence C and focal power to be equipped with the focal power along light in proper order from preceding incident direction backward among the optical system of camera lens, the preceding A of group includes from preceding biconcave negative lens A -1 who sets gradually backward and drum type positive lens A -2, after organize B and include veneer group, positive meniscus lens B -3 and the biconvex positive lens B -4 who connects airtight from the preceding biconvex positive lens B -1 who sets gradually backward and biconcave negative lens B -2. This big confocal camera lens of light day night that leads to of 4mm focus wide angle has the big angle of vision, the big light that leads to, high resolution, advantage such as day night is dual -purpose, optical structure retrencies, the material price is comparatively economic, can with 3, 000, 000 pixel high resolution's CCD or CMOS adaptation.
Description
Technical field
The utility model relates to the logical greatly light day and night confocal camera lens of a kind of 4mm focal wide angle.
Background technology
Having various big logical light to focus camera lens on early stage market is applied in safety-protection system, but, difference is resembled at edge and high-order spherical aberration is difficult to correct due to a lot of product, great majority belong to low-end product, or therefore the optical index using more eyeglasses to require to reach market, also considerably increase product cost. At present, in security protection industry, low cost height truly is rarely had to focus camera lens as the logical greatly light of wide-angle of matter.
Practical novel content
In view of this, the purpose of this utility model is to provide the logical greatly light day and night confocal camera lens of 4mm focal wide angle of a kind of compact construction, it is achieved Large visual angle angle, logical greatly light, high resolving power and height are as matter.
The utility model adopts following scheme to realize: the logical greatly light day and night confocal camera lens of a kind of 4mm focal wide angle, in the optical system of described camera lens along light from front to back incident direction be provided with successively focal power be negative before organize A, light hurdle C and focal power is positive rear group of B; Before described, group A comprises the double-concave negative lens A-1 arranged successively from front to back and drum type positive lens A-2, and after described, group B comprises gummed group, the positive meniscus lens B-3 and biconvex positive lens B-4 that the biconvex positive lens B-1 arranged successively from front to back and double-concave negative lens B-2 touches.
Further, before described, group A and the rear airspace organized between B are 1.8mm.
Further, double-concave negative lens A-1 described in described front group A and the airspace roused between type positive lens A-2 are 2.5mm; After described, in group B, airspace between gummed group and positive meniscus lens B-3 is 0.37mm; Airspace between described positive meniscus lens B-3 and biconvex positive lens B-4 is 0.1mm.
Further, the rear being positioned at described biconvex positive lens B-4 is provided with spectral filter.
Compared with prior art, the utility model has following useful effect:
A) from the technical indicator completed it will be seen that light path overall length is shorter, then the volume of camera lens is little; Rear Jiao is big, it is possible to the pick up camera of multiple interfaces with the use of.
B) clear aperture is big, and light-inletting quantity is sufficient, can in the more dim lower use of environment;
C) front group of negative power, organizes positive light coke afterwards, ensures still can normally use at high and low temperature environment;
D) high refraction, the flint glass of low dispersion and the crown glass of high refractive index height dispersion is selected to carry out achromatism and the astigmatism that disappears;
E) eyeglass that the present invention is used is face, the whole world, and R value is moderate, alleviates eyeglass assembly difficulty, it may also be useful to low price glass, reduces processing and material cost, reduces the optical sensitive degree of camera lens simultaneously.
For making the purpose of this utility model, technical scheme and advantage clearly understand, below by specific embodiment and relevant drawings, the utility model will be described in further detail.
Accompanying drawing explanation
Fig. 1 is the optical system schematic diagram of the utility model embodiment;
Fig. 2 focuses on visible ray central vision is schemed as the MTF under matter optimal cases;
Fig. 3 focuses on the MTF figure making visible ray central vision as night vision corresponding under matter optimal cases.
Embodiment
As shown in Figure 1, the logical greatly light day and night confocal camera lens of a kind of 4mm focal wide angle, in the optical system of described camera lens along light from front to back incident direction be provided with successively focal power be negative before organize A, light hurdle C and focal power is positive rear group of B; Before described, group A comprises the double-concave negative lens A-1 arranged successively from front to back and drum type positive lens A-2, and after described, group B comprises gummed group, the positive meniscus lens B-3 and biconvex positive lens B-4 that the biconvex positive lens B-1 arranged successively from front to back and double-concave negative lens B-2 touches.
In the present embodiment, described front group A and the rear airspace organized between B are 1.8mm.
In the present embodiment, before described, airspace between double-concave negative lens A-1 and drum type positive lens A-2 described in group A is 2.5mm; After described, in group B, airspace between gummed group and positive meniscus lens B-3 is 0.37mm; Airspace between described positive meniscus lens B-3 and biconvex positive lens B-4 is 0.1mm.
The optical system being made up of above-mentioned lens set reaches following optical index:
1, focal length: f '=4mm;
2, relative aperture F=1.4;
3, field angle: 2w >=120 ° (image space is as visual field 2 η ' >=Ф 6.6mm);
4, distort: <-12%;
5, resolving power: can be adaptive with 3,000,000 pixel high-resolution CCD or cmos camera;
6, light path overall length ∑≤22mm, intercept L ' >=6.3mm after optics;
7, spectrum line scope: 480nm～850nm it is suitable for.
In the present embodiment, the rear being positioned at described biconvex positive lens B-4 is provided with spectral filter.
This camera lens possesses the safety-security area market advantage, front group of negative power is corrected 3 rank and is resembled difference and 5 rank spherical aberrations, rear group of glue pellet is made up of main rectification aberration and astigmatism the crown glass of the flint glass of high-refractivity and low-dispersion and high refractive index height dispersion, the rear group of two panels positive lens near image planes adopts glass of high refractive index to correct higher order aberrations, to reach the low difference height that resembles of big logical light as matter camera lens, high-definition camera level is reached with lower cost, when optical design, the focal power of camera lens is carried out properly distributed, camera lens is made reasonably to be corrected at the aberration of the wavelength region of 480～850nm and balance. not only while daytime can reach high-quality pixel, when insufficient light or night, by infrared benefit light, also can ensure the high-quality of image, i.e. day and night confocal camera lens.
Whole camera lens ensures camera lens specific refractory power and the distribution of focal power approximate ratio, and the harmony of the input angle size of group eyeglass before and after ensureing, to reduce the susceptibility of camera lens, it is to increase the possibility of production. The reverse property of group focal power before and after simultaneously ensureing, to improve the popularity that whole camera lens uses, concrete scheme following (unit mm):
From Fig. 2 and Fig. 3 it will be seen that visible ray and infrared light are very little through the distance difference of camera lens back focal plane, same image planes can meet two kinds of wave band imaging requirements simultaneously.During visual light imaging, place is greater than 0.5 by central vision 120 line, and place is greater than 0.4 by visual field, edge 120 line; During infrared 0.85 mum wavelength imaging, place is greater than 0.3 by central vision 120 line, and place is greater than 0.4 by visual field, edge 120 line. Real realization is day and night confocal.
Above-listed better embodiment; the purpose of this utility model, technical scheme and advantage have been further described; it is it should be understood that; the foregoing is only better embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. the logical greatly light day and night confocal camera lens of a 4mm focal wide angle, it is characterised in that: in the optical system of described camera lens along light from front to back incident direction be provided with successively focal power be negative before organize A, light hurdle C and focal power is positive rear group of B; Before described, group A comprises the double-concave negative lens A-1 arranged successively from front to back and drum type positive lens A-2, and after described, group B comprises gummed group, the positive meniscus lens B-3 and biconvex positive lens B-4 that the biconvex positive lens B-1 arranged successively from front to back and double-concave negative lens B-2 touches.
2. the logical greatly light day and night confocal camera lens of 4mm focal wide angle according to claim 1, it is characterised in that: before described, group A and the rear airspace organized between B are 1.8mm.
3. the logical greatly light day and night confocal camera lens of 4mm focal wide angle according to claim 1, it is characterised in that: double-concave negative lens A-1 described in described front group A and the airspace roused between type positive lens A-2 are 2.5mm; After described, in group B, airspace between gummed group and positive meniscus lens B-3 is 0.37mm; Airspace between described positive meniscus lens B-3 and biconvex positive lens B-4 is 0.1mm.
4. the logical greatly light day and night confocal camera lens of 4mm focal wide angle according to claim 1, it is characterised in that: the rear being positioned at described biconvex positive lens B-4 is provided with spectral filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521090761.7U CN205318004U (en) | 2015-12-24 | 2015-12-24 | Big confocal camera lens of light day night that leads to of 4mm focus wide angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521090761.7U CN205318004U (en) | 2015-12-24 | 2015-12-24 | Big confocal camera lens of light day night that leads to of 4mm focus wide angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205318004U true CN205318004U (en) | 2016-06-15 |
Family
ID=56199406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521090761.7U Active CN205318004U (en) | 2015-12-24 | 2015-12-24 | Big confocal camera lens of light day night that leads to of 4mm focus wide angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205318004U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445906A (en) * | 2015-12-24 | 2016-03-30 | 福建福光股份有限公司 | 4mm-focal length wide-angle high-light transmission day-and-night confocal lens |
| CN108897132A (en) * | 2018-07-23 | 2018-11-27 | 福建福光股份有限公司 | A kind of 20mm machine vision optical system |
-
2015
- 2015-12-24 CN CN201521090761.7U patent/CN205318004U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445906A (en) * | 2015-12-24 | 2016-03-30 | 福建福光股份有限公司 | 4mm-focal length wide-angle high-light transmission day-and-night confocal lens |
| CN108897132A (en) * | 2018-07-23 | 2018-11-27 | 福建福光股份有限公司 | A kind of 20mm machine vision optical system |
| CN108897132B (en) * | 2018-07-23 | 2020-12-22 | 福建福光股份有限公司 | 20mm machine vision optical system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107741633A (en) | 1.3mm focal lengths panorama day and night confocal optical system | |
| CN108020909A (en) | A kind of 2.8mm focal lengths high definition ultra-wide angle on-vehicle lens | |
| CN105445906B (en) | A kind of big thang-kng of 4mm focal wide angles day and night confocal camera lens | |
| CN105425365B (en) | The big thang-kng tight shots of 6mm | |
| CN205318004U (en) | Big confocal camera lens of light day night that leads to of 4mm focus wide angle | |
| CN105259646A (en) | 2.8-8mm small-size zoom lens | |
| CN105938240B (en) | A kind of 2.2mm ultra-wide angle day and night confocal camera lens and preparation method thereof | |
| CN108646393A (en) | Telephoto lens | |
| CN105259638A (en) | High-light through high-definition fixed-focus aspheric lens | |
| CN210742599U (en) | Starlight-level optical lens | |
| CN205507205U (en) | Low susceptibility high definition zoom | |
| CN204855919U (en) | Big miniature mould camera lens of visual field linear deformation | |
| CN107436483A (en) | 1.7mm ultra-wide angle backsight on-vehicle lens | |
| CN109239893A (en) | A kind of low chief ray incidence angles ultra-wide angle optical system and its working method | |
| CN205193336U (en) | Big light high definition of leading to focuses aspherical mirror head | |
| CN205027964U (en) | 2. 8 -12mm zoom aspherical mirror head | |
| CN205353442U (en) | Big light tight shot that leads to of 6mm | |
| CN209343029U (en) | A kind of 3.2mm high definition bugeye lens | |
| CN107741631A (en) | A kind of 2.8mm high definition day and night confocal camera lens | |
| CN205263384U (en) | Big confocal intelligent traffic monitoring camera lens of target surface large aperture day night | |
| CN209343020U (en) | A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens | |
| CN209167643U (en) | A kind of low chief ray incidence angles ultra-wide angle optical system | |
| CN209343025U (en) | A kind of 3.24mm focal length automobile data recorder high definition camera lens | |
| CN107797259A (en) | A kind of super clear 4K tight shots of 5.2mm | |
| CN205193344U (en) | 2. 8 -8mm small -size zoom |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |