CN202886719U - Day and night lens with wide field of view, low distortion and high resolution - Google Patents
Day and night lens with wide field of view, low distortion and high resolution Download PDFInfo
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- CN202886719U CN202886719U CN201220270309.9U CN201220270309U CN202886719U CN 202886719 U CN202886719 U CN 202886719U CN 201220270309 U CN201220270309 U CN 201220270309U CN 202886719 U CN202886719 U CN 202886719U
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Abstract
The utility model relates to the field of optical imaging, and especially relates to a day and night lens with wide field of view, low distortion and high resolution. The day and night lens is characterized by successively comprising, with a diaphragm being a boundary and from an object plane to an image plane, i.e. along a light incident direction, a front lens unit (1) with positive focal power, the diaphragm (3), a rear lens unit (2) with positive focal power, and an image plane; the front lens unit (1) successively comprises a crescent-shaped lens (11) with positive focal power, a crescent-shaped lens A (12) with negative focal power, a crescent-shaped lens B (13) with negative focal power, a crescent-shaped lens C (14) with negative focal power and a biconvex lens (15) with positive focal power; the rear lens unit (2) successively comprises a biconvex lens (21) with negative focal power, a biconcave lens (22) with negative focal power, a crescent-shaped lens (23) with positive focal power, a crescent-shaped lens (24) with positive focal power and a biconvex lens (25) with positive focal power; and the biconvex lens (21) with negative focal power and the biconcave lens (22) with negative focal power together form a glue unit. The lens of the utility model allows imaging of visible light to be clear, has a function of infrared night vision, and can be used both day and night. All the optical lenses have spherical surfaces, are made of common materials and glass with low dispersion, and are short in optical overall length. Therefore, the lens of the utility model can be widely applied to a camera with megapixels.
Description
Technical field
The utility model relates to a kind of tight shot, relates in particular to the optical lens of the low distortion in a kind of large visual field, can be widely used in the fields such as safety monitoring and video conference.
Background technology
Along with the development of modern video monitoring technique, the scope that requirement can monitor is more and more wider, the visual field is increasing.And because the existence of distortion being arranged, distortion and distortion can occur in the target of monitoring, the vision and the judgement that make the mistake to people.Therefore pursuing and guaranteeing that under the condition of large visual field, people's inevitable requirement image deformation is the smaller the better.The high-resolution lens structure is one of main trend of contemporary optics imaging technique development.
Summary of the invention
The utility model provides the optical lens of a kind of large visual field, low distortion, mega pixel for above deficiency.
The technical scheme that the utility model adopts is:
The low distortion in the large visual field of a kind of day and night high-resolution lens take diaphragm as the separatrix, from object plane to image planes, namely comprises successively that along the light incident direction focal power is that positive front lens group 1, diaphragm 3, focal power is positive rear lens group 2 and image planes.Wherein:
The focal power of described front lens group 1 inside is that positive selenodont lens 11 and focal power is to be provided with packing ring 31 between the selenodont lens A12 that bears, focal power is close to focal power on the negative selenodont lens B13 for negative selenodont lens A12, focal power is close to focal power on the negative selenodont lens C14 for negative selenodont lens B13, and focal power is to be provided with packing ring 32 between the positive lenticular lens 15 for negative selenodont lens C14 and focal power.
The focal power of described rear lens group 2 inside is balsaming lens group with focal power for negative double concave type lens 22 for negative lenticular lens 21, the balsaming lens group is close on the lens 23, focal power is that positive selenodont lens 23 and focal power are to be provided with packing ring 33 between the positive selenodont lens 24, and focal power is that positive selenodont lens 24 and focal power are to be provided with packing ring 34 between the positive lenticular lens 25.
The low distortion in the large visual field of described a kind of day and night high-resolution lens, radius of curvature R
1And R
2, light refractive index N, Abbe coefficient V
dAnd lens thickness D satisfies successively along the light incident direction:
With packing ring 33 it is separated between front lens group 1 and the rear lens group 2; Packing ring 33 also is equal to diaphragm 3 simultaneously, plays the effect of restriction entire light caliber size.
Each power of lens in reasonable distribution front lens group 1 and the rear lens group 2, concrete optical index is as follows:
Focal length: f=2.6mm,
Field angle: 2 * W=100.5 °
Distortion: D＜1.5%
Relative aperture: F#=1.80
Image planes size: 1/3 "
Optical transfer function: MTF 〉=0.5@100lp/mm
Optics overall length: TTL=32.5mm.
The beneficial effects of the utility model:
Can mate modern high definition mega pixel camera, the image quality that produces is clear; Simultaneously also possessed infrared night viewing function, can realize round-the-clock twenty four hours monitoring; When guaranteeing large visual field, proofread and correct, reduced optical distortion, the image that therefore absorbs can reflect body form and size truly.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is optical system schematic diagram of the present utility model.
Embodiment:
As shown in drawings, this camera lens comprises altogether 10 lens, diaphragm 3 and is respectively applied to load and body tube 17, dead ring 18 and the fixed mount 19 of fastening lens from object plane to image planes direction.
The low distortion in the large visual field of a kind of day and night high-resolution lens take diaphragm as the separatrix, from object plane to image planes, namely comprises successively that along the light incident direction focal power is that positive front lens group 1, diaphragm 3, focal power is positive rear lens group 2 and image planes.Wherein:
Claims (4)
1. the distortion high-resolution lens is hanged down in the large visual field of day and night, it is characterized in that: take diaphragm as the separatrix, from object plane to image planes, namely comprise successively that along the light incident direction focal power is that positive front lens group (1), diaphragm (3), focal power is positive rear lens group (2) and image planes; Front lens group (1) comprises that successively focal power is that positive selenodont lens (11), focal power is positive lenticular lens (15) for negative selenodont lens B (13), focal power for negative selenodont lens C (14), focal power for negative selenodont lens A (12), focal power; Rear lens group (2) comprises that successively focal power is that lenticular lens (21), the focal power of bearing is that positive selenodont lens (23), focal power is positive selenodont lens (24) for negative double concave type lens (22), focal power, focal power is positive lenticular lens (25), and focal power consists of a gummed group for negative lenticular lens (21) and focal power for negative double concave type lens (22).
2. the distortion high-resolution lens is hanged down in the large visual field of a kind of day and night according to claim 1, it is characterized in that: the inner focal power of front lens group (1) is that positive selenodont lens (11) and focal power is to be provided with packing ring (31) between the selenodont lens A (12) that bears, focal power is close to focal power on the negative selenodont lens B (13) for negative selenodont lens A (12), focal power is close to focal power on the negative selenodont lens C (14) for negative selenodont lens B (13), and focal power is to be provided with packing ring (32) between the positive lenticular lens (15) for negative selenodont lens C (14) and focal power.
3. the distortion high-resolution lens is hanged down in the large visual field of a kind of day and night according to claim 1, it is characterized in that: the inner focal power of rear lens group (2) is the balsaming lens group for negative lenticular lens (21) and focal power for negative double concave type lens (22), the balsaming lens group is close on the lens (23), focal power is that positive selenodont lens (23) and focal power are to be provided with packing ring (33) between the positive selenodont lens (24), and focal power is that positive selenodont lens (24) and focal power are to be provided with packing ring (34) between the positive lenticular lens (25).
4. the low distortion in the large visual field of a kind of day and night according to claim 1 high-resolution lens is characterized in that: with packing ring (33) it is separated between front lens group (1) and the rear lens group (2); Packing ring (33) also is equal to diaphragm (3) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220270309.9U CN202886719U (en) | 2012-06-11 | 2012-06-11 | Day and night lens with wide field of view, low distortion and high resolution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220270309.9U CN202886719U (en) | 2012-06-11 | 2012-06-11 | Day and night lens with wide field of view, low distortion and high resolution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886719U true CN202886719U (en) | 2013-04-17 |
Family
ID=48078128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220270309.9U Expired - Fee Related CN202886719U (en) | 2012-06-11 | 2012-06-11 | Day and night lens with wide field of view, low distortion and high resolution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202886719U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389565A (en) * | 2013-08-15 | 2013-11-13 | 福建福光数码科技有限公司 | Low-distortion and high-resolution infrared miniature lens |
| CN104007533A (en) * | 2014-05-21 | 2014-08-27 | 苏州莱能士光电科技有限公司 | Large-image-plane, high-resolution and low-distortion optical lens |
| CN108845418A (en) * | 2018-06-29 | 2018-11-20 | 福建福光股份有限公司 | A kind of high-resolution machine vision optical system |
-
2012
- 2012-06-11 CN CN201220270309.9U patent/CN202886719U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389565A (en) * | 2013-08-15 | 2013-11-13 | 福建福光数码科技有限公司 | Low-distortion and high-resolution infrared miniature lens |
| CN104007533A (en) * | 2014-05-21 | 2014-08-27 | 苏州莱能士光电科技有限公司 | Large-image-plane, high-resolution and low-distortion optical lens |
| CN108845418A (en) * | 2018-06-29 | 2018-11-20 | 福建福光股份有限公司 | A kind of high-resolution machine vision optical system |
| CN108845418B (en) * | 2018-06-29 | 2020-08-18 | 福建福光股份有限公司 | High-resolution machine vision optical system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20180611 |