CN205027964U - 2. 8 -12mm zoom aspherical mirror head - Google Patents
2. 8 -12mm zoom aspherical mirror head Download PDFInfo
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- CN205027964U CN205027964U CN201520778982.7U CN201520778982U CN205027964U CN 205027964 U CN205027964 U CN 205027964U CN 201520778982 U CN201520778982 U CN 201520778982U CN 205027964 U CN205027964 U CN 205027964U
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Abstract
The utility model relates to a 2.8 -12mm zoom aspherical mirror head, including setting up the optical system in the lens cone, the A of group organized B after with before optical system was equipped with along the light incidence direction in proper order, the preceding A of group organizes after and is provided with diaphragm C between the B, the preceding A of group includes along the burden moon tooth form lens A -1 that the light incidence orientation set gradually, biconcave plastics aspherical lens A -2, biconvex lens A -3, after organize B and include a burden month tooth form plastics aspherical lens B -1 who sets gradually along the light incidence orientation, biconvex lens B -2, the veneer group that burden month tooth form lens B -3 and biconvex lens B -4 connect airtight, the utility model discloses simple structure, the panel number is less, has used the aspherical mirror piece, fine correction the aberration of off -axial visual field, can reach high -quality pixel daytime, also can reach the same picture matter under the condition at not enough light or night, has guaranteed the confocal function of day night of camera lens, the used glass of optical system is few, has reduced manufacturing cost.
Description
Technical field
The utility model relates to a kind of 2.8-12mm zoom aspheric lens.
Background technology
The mid-90 in last century is born in by web camera, and camera lens is as the main composition part of video camera, and its performance directly affects image quality.Early stage market there is various zoom lens be applied in safety-protection system, but because the optical mirror slip of a lot of product is more, add assembling adjustment difficulty, spectrophotometric data is lower, great majority belong to low-end product, can only the common camera of adaptive lower pixel, and be difficult to realize the advantages such as large wide-angle, high resolving power, day and night confocal and eyeglass sheet number be less.On the other hand, along with the development of aspheric surface technology, plastic aspherical element also can apply in optical lens, and carries important effect.
Utility model content
In order to overcome, existing pick-up lens technical indicator is lower, assembly difficulty these defects comparatively large, promote the development of pick-up lens high definition, need promote the image quality of camera system, expand the range of application of camera system, the utility model provides a kind of 2.8-12mm zoom aspheric lens.
The technical solution of the utility model is, a kind of 2.8-12mm zoom aspheric lens, comprises the optical system be arranged in lens barrel, and described optical system is provided with front group of A and rear group of B successively along light direction, be provided with diaphragm C between front group of A and rear group of B.
Further, before described group A comprise set gradually along light direction negative selenodont lens A-1, concave-concave plastic aspheric lens A-2, biconvex lens A-3, described rear group of B comprises the gummed group that negative selenodont plastic aspheric lens B-1, the biconvex lens B-2, the negative selenodont lens B-3 and biconvex lens B-4 that set gradually along light direction touch.
Further, short burnt airspace between described front group of A and rear group of B is 20.9mm, focal length airspace is 1.1mm, airspace between described negative selenodont lens A-1 and concave-concave plastic aspheric lens A-2 is 5.4mm, airspace between described concave-concave plastic aspheric lens A-2 and biconvex lens A-3 is 0.7mm, airspace between described negative selenodont plastic aspheric lens B-1 and biconvex lens B-2 is 0.4mm, and the airspace between described biconvex lens B-2 and gummed group is 0.1mm.
Further, described concave-concave plastic aspheric lens A-2 is contrary with the focal power of negative selenodont plastic aspheric lens B-1.
Compared with prior art, the utility model has following beneficial effect: structure is simple, sheet number is less, and employ aspherical lens, well correct the aberration of the outer visual field of axle, while high-quality pixel being reached daytime, also can reach identical picture element when insufficient light or night, ensure that the day and night confocal function of camera lens, optical system glass used is few, alleviates eyeglass assembly difficulty, reduces production cost.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, elaboration detailed is further done to the utility model.
Optical system diagram when Fig. 1 is short Jiao of the utility model embodiment;
Optical system diagram when Fig. 2 is the focal length of the utility model embodiment;
Fig. 3 focuses on the MTF figure made under visible ray central vision picture element optimal cases under short Jiao;
Fig. 4 is that the night vision MTF that Fig. 3 is corresponding schemes;
Fig. 5 focuses on the MTF figure made under visible ray central vision picture element optimal cases under focal length;
Fig. 6 is that the night vision MTF that Fig. 5 is corresponding schemes.
In figure:
A-1-bears selenodont lens A-1; A-2-concave-concave plastic aspheric lens A-2; A-3-biconvex lens A-3; B-1-bears selenodont plastic aspheric lens B-1; B-2-biconvex lens B-2; B-3-bears selenodont lens B-3; B-4-biconvex lens B-4; C-diaphragm C; D-sensor.
Embodiment
As shown in Fig. 1 ~ 6, a kind of 2.8-12mm zoom aspheric lens, comprises the optical system be arranged in lens barrel, and described optical system is provided with front group of A and rear group of B successively along light direction, be provided with diaphragm C between front group of A and rear group of B.
In the present embodiment, before described group A comprise set gradually along light direction negative selenodont lens A-1, concave-concave plastic aspheric lens A-2, biconvex lens A-3, described rear group of B comprises the gummed group that negative selenodont plastic aspheric lens B-1, the biconvex lens B-2, the negative selenodont lens B-3 and biconvex lens B-4 that set gradually along light direction touch.
In the present embodiment, short burnt airspace between described front group of A and rear group of B is 20.9mm, focal length airspace is 1.1mm, airspace between described negative selenodont lens A-1 and concave-concave plastic aspheric lens A-2 is 5.4mm, airspace between described concave-concave plastic aspheric lens A-2 and biconvex lens A-3 is 0.7mm, airspace between described negative selenodont plastic aspheric lens B-1 and biconvex lens B-2 is 0.4mm, and the airspace between described biconvex lens B-2 and gummed group is 0.1mm.
In the present embodiment, described concave-concave plastic aspheric lens A-2 is contrary with the focal power of negative selenodont plastic aspheric lens B-1, ensures that camera lens is under high/low temperature-30 ~ 60 DEG C of environment, can make up mutually, thus can blur-free imaging.
In the present embodiment, when optical design, reasonable distribution is carried out to the focal power of camera lens, make camera lens obtain correcting and balance at the aberration of the wavelength coverage of 480 ~ 656nm.Such camera lens can not only blur-free imaging under photoenvironment in the daytime, under night pole low-light (level) environment, by 850nm infrared light light filling, and also can blur-free imaging.
In the present embodiment, the technical indicator of this camera lens realization is as follows: short focal length: f '=2.8mm; Focal length focal length: f '=12mm; Relative aperture F=1.4 ~ 2.4; Field angle: 2w >=40 ° ~ 140 ° (image space is as visual field 2 η ' >=Ф 6.6mm); Distortion: <-40%; Resolution: can be adaptive with 5,000,000 pixel high-resolution CCD or cmos camera; Light path overall length ∑≤50mm, optics rear cut-off distance L ' >=7mm is suitable for spectral line scope: 480 ~ 850nm.
In the present embodiment, select in optical system high refraction, low dispersion flint glass with carry out achromatism compared with the crown glass of low-refraction.
In the present embodiment, from Fig. 3 and Fig. 4, during short Jiao, the distance difference of visible ray and infrared light lens back focal plane is very little, and same image planes can meet high-quality imaging requirements.During visual light imaging, central vision 180 line is greater than 0.45 to place, and peripheral field 180 line is greater than 0.22 to place; During infrared 0.85 mum wavelength imaging, central vision 180 line is greater than 0.55 to place, and peripheral field 180 line is greater than 0.25 to place.Visible ray is almost consistent with the effect of near infrared imaging, meets day and night confocal imaging requirements.
In the present embodiment, from Fig. 5 and Fig. 6, during focal length, during visual light imaging, central vision 180 line is greater than 0.4 to place, and peripheral field 180 line is greater than 0.25 to place; During infrared 0.85 mum wavelength imaging, central vision 180 line is greater than 0.42 to place, and peripheral field 180 line is greater than 0.25 to place.Visible ray is almost consistent with the effect of near infrared imaging, and focal plane drift is very little, can meet high-quality imaging requirements in same image planes, meets day and night confocal imaging requirements.
The foregoing is only preferred embodiment of the present utility model, all equalizations done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (3)
1. a 2.8-12mm zoom aspheric lens, it is characterized in that: comprise the optical system be arranged in lens barrel, described optical system is provided with front group of A and rear group of B successively along light direction, diaphragm C is provided with between front group of A and rear group of B, before described, group A comprises the negative selenodont lens A-1 set gradually along light direction, concave-concave plastic aspheric lens A-2, biconvex lens A-3, described rear group of B comprises the negative selenodont plastic aspheric lens B-1 set gradually along light direction, biconvex lens B-2, the gummed group that negative selenodont lens B-3 and biconvex lens B-4 touches.
2. 2.8-12mm zoom aspheric lens according to claim 1, it is characterized in that: the short burnt airspace between described front group of A and rear group of B is 20.9mm, focal length airspace is 1.1mm, airspace between described negative selenodont lens A-1 and concave-concave plastic aspheric lens A-2 is 5.4mm, airspace between described concave-concave plastic aspheric lens A-2 and biconvex lens A-3 is 0.7mm, airspace between described negative selenodont plastic aspheric lens B-1 and biconvex lens B-2 is 0.4mm, airspace between described biconvex lens B-2 and gummed group is 0.1mm.
3. 2.8-12mm zoom aspheric lens according to claim 1, is characterized in that: described concave-concave plastic aspheric lens A-2 is contrary with the focal power of negative selenodont plastic aspheric lens B-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520778982.7U CN205027964U (en) | 2015-10-10 | 2015-10-10 | 2. 8 -12mm zoom aspherical mirror head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520778982.7U CN205027964U (en) | 2015-10-10 | 2015-10-10 | 2. 8 -12mm zoom aspherical mirror head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205027964U true CN205027964U (en) | 2016-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520778982.7U Withdrawn - After Issue CN205027964U (en) | 2015-10-10 | 2015-10-10 | 2. 8 -12mm zoom aspherical mirror head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205027964U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158886A (en) * | 2015-10-10 | 2015-12-16 | 福建福光股份有限公司 | Zoom aspheric lens unit of 2.8 to 12mm |
| CN110646920A (en) * | 2019-09-17 | 2020-01-03 | 福建福光天瞳光学有限公司 | Long-focus vehicle-mounted optical lens and working method thereof |
-
2015
- 2015-10-10 CN CN201520778982.7U patent/CN205027964U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158886A (en) * | 2015-10-10 | 2015-12-16 | 福建福光股份有限公司 | Zoom aspheric lens unit of 2.8 to 12mm |
| CN110646920A (en) * | 2019-09-17 | 2020-01-03 | 福建福光天瞳光学有限公司 | Long-focus vehicle-mounted optical lens and working method thereof |
| CN110646920B (en) * | 2019-09-17 | 2023-10-27 | 福建福光天瞳光学有限公司 | Long-focal-length vehicle-mounted optical lens and working method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160210 Effective date of abandoning: 20171003 |