CN203909387U - Optical lens capable of temperature compensation - Google Patents
Optical lens capable of temperature compensation Download PDFInfo
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- CN203909387U CN203909387U CN201420306556.9U CN201420306556U CN203909387U CN 203909387 U CN203909387 U CN 203909387U CN 201420306556 U CN201420306556 U CN 201420306556U CN 203909387 U CN203909387 U CN 203909387U
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- lens
- optical
- light
- temperature compensation
- compensation according
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Abstract
The utility model discloses an optical lens capable of temperature compensation. The optical lens comprises a lens shell, and first to fourth lenses made of optical glass and/or optical resin are successively arranged from the object part to the image part in the lens shell. The first lens is a straw-hat-shaped lens with negative focal power, the second lens is a bi-convex lens with positive focal power, the third lens is also a bi-convex lens with positive focal power, and the fourth lens is a bi-concave lens with negative focal power. A diaphragm element is arranged between the first and second lenses, and the fourth lens is optically connected with a color filter. The wave bands of visible light and near infrared rays introduced by the optical lens are focuses in the same focal plane to enable clear imaging in both day and night modes.
Description
[technical field]
The utility model relates to a kind of optical lens that can temperature compensation.
[background technology]
Along with the optimization of rapid emergence, Digital Signal Processing and the network transfer speeds in safety monitoring in this year market promotes, quality requirements to safety monitoring camera lens improves greatly, discriminating from common supervision demand to high definition, cost control from institutional settings single-point is applied to normal domestic market among a small circle, and environment strict, complicated and changeable, more and more higher to the requirement of pick-up lens.
Safety monitoring camera lens is general at present adopts 4 to 6 eyeglasses to form, and is all spherical glass.Along with rising violently of the prices of raw and semifnished materials, the price of finished glass eyeglass is also more and more higher, thereby causes the cost of pick-up lens high, is difficult to the popular civilian and toy market that is applied to again.
From cost consider, will reduce glass mirror usage quantity, but reduce eyeglass quantity, the degradation with regard to imaging resolution bringing, can not be accepted by market.The usage quantity that only reduces lens element by sphere technology, glass aspheric surface is expensive, can not use.Plastic aspherical element eyeglass is with low cost with it, moulding process maturation, and production efficiency is high to be conducive to large quantities of mass-produced advantages and to be widely used.
But limit by the physical characteristics of plastic material own, expanding with heat and contract with cold of being subject to that temperature variation causes is very large on the impact of imaging, and temperature compensation performance is not good, cannot meet and in the temperature range of-30 DEG C～+ 70 DEG C, keep more perfect imaging definition.
[utility model content]
The utility model has overcome the deficiency of above-mentioned technology, a kind of optical lens that can temperature compensation is provided, a kind of simultaneously meet visible spectrum and not full HD lens system of heatproof near infrared of out of focus of near infrared spectrum wave band imaging focal plane, by adopting plastic aspherical element technology to realize temperature compensation, greatly reduce camera lens production cost and improved production efficiency, can be applicable to the photographic camera of civilian, security protection, toy market, round-the-clock uninterrupted blur-free imaging can be realized, the environmental baseline that is suitable for different regions temperature variation can be met.
For achieving the above object, the utility model has adopted following technical proposal:
An optical lens of realizing temperature compensation, includes mirror head outer shell, is provided with from the object side to the image side the lens of being made up of optical glass and/or optical resin in described mirror head outer shell, comprises successively:
First lens 1, it has the straw hat type lens of negative power;
The second lens 3, it has the lenticular lens of positive light coke;
The 3rd lens 4, it has the lenticular lens of positive light coke;
The 4th lens 5, it has the double concave type lens of negative power;
Between described first lens 1 and the second lens 3, be provided with aperture member 2, described the 4th lens 5 light are connected with color filter 6, and visible light wave range and near-infrared band that described camera lens imports focus at same focal plane, make its by day with night mode under equal energy blur-free imaging.
Described camera lens at least comprises two high order aspheric surface resin lens.
The aspheric surface number of times of described high order aspheric surface resin lens is 16 times.
Described first lens 1 is glass lens, the refractive index n d < 1.5 of described first lens 1, Abbe number vd < 70, described first lens 1 is convex mirror towards the one side r1 of object plane, and the one side r2 that described first lens 1 is connected with aperture member 2 light is concave mirror.
Described the second lens 3 are high order aspheric surface resin lens, the refractive index n d < 1.54 of the second lens 3, Abbe number vd < 55, the one side r3 that described the second lens 3 are connected with aperture member 2 light is convex mirror, and described the second lens 3 are convex mirror with the one side r4 that the 3rd lens 4 light are connected.
Described the 3rd lens 4 are glass lens, the refractive index n d > 1.75 of described the 3rd lens 4, Abbe number vd > 50, described the 3rd lens 4 are convex mirror with the one side r5 that the second lens 3 light are connected, and described the 3rd lens 4 are convex mirror with the one side r6 that the 4th lens 5 light are connected.
Described the 4th lens 5 are high order aspheric surface lens, the refractive index n d > 1.63 of described the 4th lens 5, Abbe number vd > 24, described the 4th lens 5 are concave mirror with the one side r7 that the 3rd lens 4 light are connected, and the one side r8 that described the 4th lens 5 are connected with color filter 6 light is concave mirror.
The f-number of described camera lens is more than F1.6.
Described first lens 1 focal distance f
fwith the second lens 3, the 3rd lens 4, the 4th lens 5 combined focal length f
bratio range be-1.8≤f
f/ f
b≤-1.4.
The beneficial effects of the utility model are:
1, the utility model adopts glass mirror and plastic lens mixed configuration, has solved the problem of visible ray and the drift of near infrared light instep, has realized visible ray and near infrared light high resolving power.
2, the utility model the second convex lens and the 4th concave lens have adopted technique for temperature compensation, have solved the impact that outside environment temperature is impacted camera lens, ensure that camera lens can blur-free imaging under high low temperature (30 DEG C to 70 DEG C) environment.
3, the utility model adopts the optical texture of four optical mirror slips, greatly reduces the production cost of camera lens and has improved production efficiency.
[brief description of the drawings]
Fig. 1 is the utility model structural representation;
Fig. 2 is the axial chromatic aberration curve map of the utility model visible light part;
Fig. 3 is the axial chromatic aberration curve map of the utility model infrared light part;
Fig. 4 is the chromatic longitudiinal aberration curve map of the utility model visible light part;
Fig. 5 is the chromatic longitudiinal aberration curve map of the utility model infrared light part;
Fig. 6 is astigmatism and the distortion curve figure of the utility model visible light part;
Fig. 7 is astigmatism and the distortion curve figure of the utility model infrared light part;
Fig. 8 is the MTF curve map of the utility model visible light part;
Fig. 9 is the MTF curve map of the utility model infrared light part;
Figure 10 is MTF curve map under the utility model visible light part-30 degree low temperature;
Figure 11 is that 70 of the utility model visible light part is spent MTF curve map under high temperature.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and embodiment of the present utility model:
As shown in Figure 1, a kind of optical lens that can temperature compensation, is characterized in that: include mirror head outer shell, be provided with from the object side to the image side the lens of being made up of optical glass and/or optical resin in described mirror head outer shell, comprise successively:
First lens 1, it has the straw hat type lens of negative power;
The second lens 3, it has the lenticular lens of positive light coke;
The 3rd lens 4, it has the lenticular lens of positive light coke;
The 4th lens 5, it has the double concave type lens of negative power;
Between described first lens 1 and the second lens 3, be provided with aperture member 2, described the 4th lens 5 light are connected with color filter 6, and visible light wave range and near-infrared band that described camera lens imports focus at same focal plane, make its by day with night mode under equal energy blur-free imaging.
Wherein, described camera lens at least comprises two high order aspheric surface resin lens; The aspheric surface number of times of described high order aspheric surface resin lens is 16 times, and this optical lens is formed by four sheet glass eyeglasses or plastic lens mixed configuration, greatly reduces production cost.
Described first lens 1 is convex mirror towards the one side r1 of object plane, and for reducing optical system distortion, distortion is that object and picture lose similarity, controls distortion extremely important concerning the camera lens of large visual field; The one side r2 that described first lens 1 is connected with aperture member 2 is concave mirror.
Wherein, described first lens 1 refractive index is nd < 1.5, and Abbe number is vd < 70, can effectively reduce the aberration impact that the incident ray of large field angle brings.
The one side r3 that described the second lens 3 are connected with aperture member 2 light is convex mirror, described the second lens 3 are convex mirror with the one side r4 that the 3rd lens 4 light are connected, the second lens 3 can converge the light of first lens 1 import optical system fast, because aspheric higher order term coefficient variation is many, make the correction ground of residual aberration more perfect; And the second lens 3 have certain thickness, can reduce the curvature of field aberration of large incident angle light, because in the time there is the curvature of field in a system, can not obtain whole image planes all clearly image plane (or visual field in the middle of clear, field of view edge is clear or field of view center is clear, be that center and periphery are asynchronous), avoid because the second lens 3 are too thin, made a hereby accumulation curvature of field of ten thousand curvature of field and system be difficult to proofread and correct.
Wherein, the refractive index of described the second lens 3 is nd < 1.54, and Abbe number is vd < 55.
Described the 3rd lens 4 are convex mirror with the one side r5 that the second lens 3 light are connected; Described the 3rd lens 4 are convex mirror with the one side r6 that the 4th lens 5 light are connected.
Wherein, the refractive index n d > 1.75 of described the 3rd lens 4, Abbe number vd > 50, described the 3rd lens 4 converge the light through first lens 1, the second lens 3, and the 3rd lens 4 are low chromatic dispersion material, the value of chromatism in energy effective compensation optical system.
Described the 4th lens 5 are concave mirror with the one side r7 that the 3rd lens 4 light are connected; The one side r8 that described the 4th lens 5 are connected with color filter 6 light is concave mirror, and because the 4th lens 5 are aspheric surface, higher order term coefficient variation is many, allow proofreading and correct of residual aberration more perfect.
Wherein, the refractive index n d > 1.63 of described the 4th lens 5, Abbe number vd > 24.
The second lens 3 and the 4th lens 5 carry out rational eyeglass distribution, ensure that product can reach good performance, and reasonably technique for temperature compensation ensures that camera lens can possess good performance under high low temperature (30 DEG C to 70 DEG C) environment.
The f-number of described aperture member 2 is greater than F1.6, realizes large aperture and catches at a high speed image-forming information.
Camera lens is divided into front and back two group as boundary camera lens taking aperture member 2, wherein the combined focal length f of front arrangement of mirrors sheet (being first lens 1)
frepresent the combined focal length f of rear arrangement of mirrors sheet (i.e. the second lens 3, the 3rd lens 4 and the 4th lens 5)
brepresent, satisfy condition :-1.8≤f
f/ f
b≤-1.4; The system that limited must have the positive negative power combination of mutual compensation, works as f
f/ f
bbe less than lower limit-1.8 o'clock, optical system overall length can increase, and is unfavorable for the requirement of miniaturization structure compactness; Work as f
f/ f
bbe greater than the upper limit-1.4 o'clock, the field angle of system cannot ensure.
Therefore, the utility model uses plastic aspherical element technology to solve the technical barrier of visible ray and the drift of near infrared light focal plane and the ambient temperature variation impact compensation on camera lens impact, realize low cost, the above object lens of large relative aperture of F2.0, the above high resolving power of mega pixel and longer back work distance are from the lower cost solution of miniaturization.
Fig. 2 to Fig. 9 is that the utility model should be in the optical performance curve figure of case study on implementation, wherein
Fig. 2 is visible light part axial chromatic aberration curve map (also can be spherical aberration curve map), is represented by the F commonly using, d, C (F=0.486um, d=0.588um, C=0.656um) three look light wavelengths, and unit is millimeter mm.
Fig. 3 is infrared light part axial chromatic aberration curve map (also can be spherical aberration curve map), is represented by the near-infrared light waves three look light wavelengths of commonly using, and unit is millimeter mm.
Fig. 4 is visible light part chromatic longitudiinal aberration curve, is represented by the F commonly using, d, C tri-look light wavelengths, and unit is micron um.
Fig. 5 is infrared light chromatic longitudiinal aberration curve, is represented by the near infrared three look light wavelengths of commonly using, and unit is micron um.
Fig. 6 is visible light part astigmatism and distortion curve figure, is represented by the F commonly using, d, C tri-look light wavelengths, and unit is mm, and distortion curve figure represents the distortion sizes values in different field angle situations, and unit is %.
Fig. 7 is infrared light part astigmatism and distortion curve figure, is represented by the near infrared three look light wavelengths of commonly using, and unit is mm, and distortion curve figure represents the distortion sizes values in different field angle situations, and unit is %.
Fig. 8 is visible light part MTF curve map, has represented that the comprehensive solution of an optical system is as level.As seen from the figure, this optical lens is by various aberration corrections to good level.
Fig. 9 is infrared light part MTF curve map, has represented that the comprehensive solution of an optical system is as level.As seen from the figure, this optical lens is by various aberration corrections to good level.
In the utility model case study on implementation, the whole focal length value of this optical lens is EFL, and f-number is FNO, and field angle is FOV, camera lens overall length TTL, and started by object space side, by each minute surface number consecutively, the minute surface of first lens 1 is r1, r2, the minute surface of the second lens 3 is r3, r4, the minute surface of the 3rd lens 4 is r5, r6, and the minute surface of the 4th lens 5 is r7, r8, color filter.
The utility model preferred parameter value (table one)
EFL＝4mm，FNO＝2.2，FOV＝95°，TTL＝22.2mm
Asphericity coefficient list
| ? | S4 | S5 | S8 | S9 |
| K | 166.8522 | -0.4139 | -4.8292 | -736.422 |
| A2 | 0 | 0 | 0 | 0 |
| A4 | -0.00482795 | 0.002093904 | 0.007341404 | 0.020852122 |
| A6 | 5.12819E-05 | -0.00020587 | -0.00134774 | -0.00215319 |
| A8 | -0.00019965 | 3.97706E-05 | 8.20052E-05 | 0.000139839 |
| A10 | 6.21818E-05 | -5.2952E-06 | 5.48956E-06 | 1.97289E-06 |
| A12 | -1.4387E-05 | -2.1849E-07 | -1.7793E-06 | -2.4172E-06 |
| A14 | 9.3762E-07 | 5.48646E-08 | 1.30443E-07 | 2.54826E-07 |
| A16 | 0 | 0 | 0 | 0 |
Claims (9)
1. a optical lens that can temperature compensation, is characterized in that: include mirror head outer shell, be provided with from the object side to the image side the lens of being made up of optical glass and/or optical resin in described mirror head outer shell, comprise successively:
First lens (1), it has the straw hat type lens of negative power;
The second lens (3), it has the lenticular lens of positive light coke;
The 3rd lens (4), it has the lenticular lens of positive light coke;
The 4th lens (5), it has the double concave type lens of negative power;
Between described first lens (1) and the second lens (3), be provided with aperture member (2), described the 4th lens (5) light is connected with color filter (6), visible light wave range and near-infrared band that described camera lens imports focus at same focal plane, make its by day with night mode under equal energy blur-free imaging.
2. a kind of optical lens that can temperature compensation according to claim 1, is characterized in that: described camera lens at least comprises two high order aspheric surface resin lens.
3. a kind of optical lens that can temperature compensation according to claim 2, is characterized in that: the aspheric surface number of times of described high order aspheric surface resin lens is 16 times.
4. a kind of optical lens that can temperature compensation according to claim 1, it is characterized in that: described first lens (1) is glass lens, the refractive index n d < 1.5 of described first lens (1), Abbe number vd < 70, described first lens (1) is convex mirror towards the one side r1 of object plane, and described first lens (1) is concave mirror with the one side r2 that aperture member (2) light is connected.
5. a kind of optical lens that can temperature compensation according to claim 1, it is characterized in that: described the second lens (3) are high order aspheric surface resin lens, the refractive index n d < 1.54 of the second lens (3), Abbe number vd < 55, described the second lens (3) are convex mirror with the one side r3 that aperture member (2) light is connected, and described the second lens (3) are convex mirror with the one side r4 that the 3rd lens (4) light is connected.
6. a kind of optical lens that can temperature compensation according to claim 1, it is characterized in that: described the 3rd lens (4) are glass lens, the refractive index n d > 1.75 of described the 3rd lens (4), Abbe number vd > 50, described the 3rd lens (4) are convex mirror with the one side r5 that the second lens (3) light is connected, and described the 3rd lens (4) are convex mirror with the one side r6 that the 4th lens (5) light is connected.
7. a kind of optical lens that can temperature compensation according to claim 1, it is characterized in that: described the 4th lens (5) are high order aspheric surface lens, the refractive index n d > 1.63 of described the 4th lens (5), Abbe number vd > 24, described the 4th lens (5) are concave mirror with the one side r7 that the 3rd lens (4) light is connected, and described the 4th lens (5) are concave mirror with the one side r8 that color filter (6) light is connected.
8. a kind of optical lens that can temperature compensation according to claim 1, is characterized in that: the f-number of described camera lens is more than F1.6.
9. a kind of optical lens that can temperature compensation according to claim 3, is characterized in that: described first lens (1) focal distance f
fwith the second lens (3), the 3rd lens (4), the 4th lens (5) combined focal length f
bratio range be-1.8≤f
f/ f
b≤-1.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306556.9U CN203909387U (en) | 2014-06-10 | 2014-06-10 | Optical lens capable of temperature compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306556.9U CN203909387U (en) | 2014-06-10 | 2014-06-10 | Optical lens capable of temperature compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203909387U true CN203909387U (en) | 2014-10-29 |
Family
ID=51783648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420306556.9U Withdrawn - After Issue CN203909387U (en) | 2014-06-10 | 2014-06-10 | Optical lens capable of temperature compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203909387U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007542A (en) * | 2014-06-10 | 2014-08-27 | 舜宇光学(中山)有限公司 | Optical lens achieving temperature compensation |
| CN106468816A (en) * | 2016-07-05 | 2017-03-01 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN106468815A (en) * | 2016-07-05 | 2017-03-01 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN109507788A (en) * | 2019-01-10 | 2019-03-22 | 厦门爱劳德光电有限公司 | A kind of large aperture near-infrared camera lenses |
-
2014
- 2014-06-10 CN CN201420306556.9U patent/CN203909387U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007542A (en) * | 2014-06-10 | 2014-08-27 | 舜宇光学(中山)有限公司 | Optical lens achieving temperature compensation |
| CN106468816A (en) * | 2016-07-05 | 2017-03-01 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN106468815A (en) * | 2016-07-05 | 2017-03-01 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN106468815B (en) * | 2016-07-05 | 2019-07-26 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN109507788A (en) * | 2019-01-10 | 2019-03-22 | 厦门爱劳德光电有限公司 | A kind of large aperture near-infrared camera lenses |
| CN109507788B (en) * | 2019-01-10 | 2024-02-09 | 厦门爱劳德光电有限公司 | Large-aperture near-infrared lens |
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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 |
Granted publication date: 20141029 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |