CN209167654U - A kind of long-focus day and night confocal camera lens - Google Patents
A kind of long-focus day and night confocal camera lens Download PDFInfo
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- CN209167654U CN209167654U CN201920013840.XU CN201920013840U CN209167654U CN 209167654 U CN209167654 U CN 209167654U CN 201920013840 U CN201920013840 U CN 201920013840U CN 209167654 U CN209167654 U CN 209167654U
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Abstract
The utility model relates to a kind of long-focus day and night confocal camera lenses, including lens group, lens group is successively arranged the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens along optical axis from object plane to image planes, and the first lens object plane side is convex surface, and image planes side is convex surface；The second lens object plane side is convex surface, and image planes side is convex surface；The third lens object plane side is concave surface, and image planes side is concave surface；The 4th lens object plane side is concave surface, and image planes side is concave surface；The 5th lens object plane side is convex surface, and image planes side is convex surface；The 6th lens object plane side is convex surface, and image planes side is convex surface.The day and night confocal camera lens of the utility model can solve the problem less than normal of lens focus in the prior art, and telephoto lens color difference is big, day and night the problem of confocal effect difference, be suitable for long-distance all-whether monitoring camera.
Description
Technical field
The utility model relates to a kind of long-focus day and night confocal camera lenses, belong to optical image technology field.
Background technique
In safety-security area, web camera is the commonly used equipment in security system, and camera lens is the main of web camera
Composition part, lens performance directly affect image quality and visual field, as the technical indicator demand of security system constantly mentions
Height, how to improve remote night monitoring quality become security industry a big project, day and night confocal camera lens be visible light and
850nm near-infrared reaches good imaging effect.Existing day and night confocal lens focus is generally in 8mm hereinafter, to 10 meters of ranges
Interior object resolving effect is good, will appear details more than 10 meters and differentiates unclear situation.Therefore, the prior art is day and night confocal
Camera lens has that lens focus is less than normal, and telephoto lens color difference is big, and day and night confocal effect is poor.It is day and night total to design a long-focus
The optical system that coke works well is necessary for monitoring the object detail of farther place.
Utility model content
The purpose of this utility model is to provide a kind of long-focus day and night confocal camera lenses, the specific scheme is that
A kind of long-focus day and night confocal camera lens, including lens group, lens group are successively arranged along optical axis from object plane to image planes
One lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens, the first lens object plane side are convex
Face, image planes side are convex surface；The second lens object plane side is convex surface, and image planes side is convex surface；The third lens object plane side is recessed
Face, image planes side are concave surface；The 4th lens object plane side is concave surface, and image planes side is concave surface；The 5th lens object plane side is convex
Face, image planes side are convex surface；The 6th lens object plane side is convex surface, and image planes side is convex surface；The focal length of the lens group meets such as
Lower condition:
-2.85<(f2/f3)<-2.05；
-0.9<(f4/f5)<-0.5；
Wherein f2 is second focal length of lens, and f3 is the third lens focal length, and f4 is the 4th focal length of lens, and f5 is that the 5th lens are burnt
Away from.
Preferably, second lens and the third lens are one group of balsaming lens.
Preferably, the 4th lens and the 5th lens are one group of balsaming lens.
Preferably, the optics overall length ttl of the lens group meets following condition: ttl≤28mm.
Preferably, 2 ω of field angle of the lens group is at 18 °~20 °.
Preferably, protection glass is additionally provided with before the image planes of the 6th lens.
The beneficial point of the utility model is: the day and night confocal camera lens of the utility model is made of 6 eyeglasses, can match 1/
3 " and following target surface SENSOR, effective viewing field angle reach 19 degree, and maximum field of view's relative illumination reaches 1.8 up to 90%, FNO.,
850nm near infrared imaging works well.When operating distance is 30 meters, the total focal length f=18mm of camera lens.Therefore, this is practical new
The day and night confocal camera lens of type can solve the problem less than normal of lens focus in the prior art, and telephoto lens color difference is big, day and night confocal
The problem of effect difference is suitable for long-distance all-whether monitoring camera.
Detailed description of the invention
Fig. 1 is the lens schematic diagram of the utility model embodiment；
Fig. 2 is first analysis diagram of the utility model embodiment；
Fig. 3 is the infrared analysis diagram of 850nm of the utility model embodiment；
Fig. 4 is the curvature of field figure of the utility model embodiment；
Fig. 5 is the distortion figure of the utility model embodiment；
Fig. 6 is the relative illumination figure of the utility model embodiment.
Specific embodiment
As shown in Figure 1, the long-focus of the utility model day and night confocal camera lens, including lens group, lens group is along optical axis from object
Face is successively arranged the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5 and to image planes
Six lens E6, the first lens object plane side S1 are convex surface, and image planes side S2 is convex surface；The second lens object plane side S3 is convex
Face, image planes side S4 are convex surface；The third lens object plane side S4 is concave surface, and image planes side S5 is concave surface；The 4th lens object plane
Side S6 is concave surface, and image planes side S7 is concave surface；The 5th lens object plane side S7 is convex surface, and image planes side S8 is convex surface；Described 6th
Lens object plane side S9 is convex surface, and image planes side S10 is convex surface；The focal length of the lens group meets following condition:
-2.85<(f2/f3)<-2.05；
-0.9<(f4/f5)<-0.5；
Wherein f2 is second focal length of lens, and f3 is the third lens focal length, and f4 is the 4th focal length of lens, and f5 is that the 5th lens are burnt
Away from.
Wherein, the second lens and the third lens are one group of balsaming lens.
Wherein, the 4th lens and the 5th lens are one group of balsaming lens.
As an improvement, the optics overall length ttl of the lens group meets following condition: ttl≤28mm.
As an improvement, 2 ω of field angle of the lens group is at 18 °~20 °.
As an improvement, being additionally provided with protection glass before the image planes of the 6th lens.
In a specific embodiment of this patent, the parameters of lens group are successively listed in Table 1 below:
Table 1
Such as Fig. 2-6, it is shown that the performance of the day and night confocal camera lens of the present embodiment, effective viewing field angle reach 19 degree, maximum
Visual field relative illumination reaches 1.8,850nm near infrared imaging up to 90%, FNO. and works well.When operating distance is 30 meters, mirror
The total focal length f=18mm of head.
Claims (6)
1. a kind of long-focus day and night confocal camera lens, including lens group, lens group are successively arranged first along optical axis from object plane to image planes
Lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens, it is characterised in that: first lens
Object plane side is convex surface, and image planes side is convex surface；The second lens object plane side is convex surface, and image planes side is convex surface；The third lens
Object plane side is concave surface, and image planes side is concave surface；The 4th lens object plane side is concave surface, and image planes side is concave surface；5th lens
Object plane side is convex surface, and image planes side is convex surface；The 6th lens object plane side is convex surface, and image planes side is convex surface；The lens group
Focal length meets following condition:
-2.85<(f2/f3)<-2.05；
-0.9<(f4/f5)<-0.5；
Wherein f2 is second focal length of lens, and f3 is the third lens focal length, and f4 is the 4th focal length of lens, and f5 is the 5th focal length of lens.
2. long-focus according to claim 1 day and night confocal camera lens, it is characterised in that: second lens and the third lens
It is one group of balsaming lens.
3. long-focus according to claim 1 day and night confocal camera lens, it is characterised in that: the 4th lens and the 5th lens
It is one group of balsaming lens.
4. long-focus according to claim 1 day and night confocal camera lens, it is characterised in that: the optics overall length of the lens group
Ttl meets following condition: ttl≤28mm.
5. long-focus according to claim 1 day and night confocal camera lens, it is characterised in that: 2 ω of field angle of the lens group
At 18 °~20 °.
6. long-focus according to claim 1 day and night confocal camera lens, it is characterised in that: before the image planes of the 6th lens
It is additionally provided with protection glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920013840.XU CN209167654U (en) | 2019-01-04 | 2019-01-04 | A kind of long-focus day and night confocal camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920013840.XU CN209167654U (en) | 2019-01-04 | 2019-01-04 | A kind of long-focus day and night confocal camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209167654U true CN209167654U (en) | 2019-07-26 |
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ID=67328219
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920013840.XU Expired - Fee Related CN209167654U (en) | 2019-01-04 | 2019-01-04 | A kind of long-focus day and night confocal camera lens |
Country Status (1)
| Country | Link |
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| CN (1) | CN209167654U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112987254A (en) * | 2021-03-08 | 2021-06-18 | 范志明 | Apochromatic ultra-long-focus photographic lens |
| CN113835200A (en) * | 2021-11-25 | 2021-12-24 | 南京万生华态科技有限公司 | Full-frame lens capable of simultaneously covering visible light and near-infrared light |
-
2019
- 2019-01-04 CN CN201920013840.XU patent/CN209167654U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112987254A (en) * | 2021-03-08 | 2021-06-18 | 范志明 | Apochromatic ultra-long-focus photographic lens |
| CN113835200A (en) * | 2021-11-25 | 2021-12-24 | 南京万生华态科技有限公司 | Full-frame lens capable of simultaneously covering visible light and near-infrared light |
| CN113835200B (en) * | 2021-11-25 | 2022-02-11 | 南京万生华态科技有限公司 | Full-frame lens capable of simultaneously covering visible light and near-infrared light |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20190726 Termination date: 20220104 |