CN209182567U - A kind of focal length infrared optics is without thermalization camera lens - Google Patents
A kind of focal length infrared optics is without thermalization camera lens Download PDFInfo
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- CN209182567U CN209182567U CN201822088167.4U CN201822088167U CN209182567U CN 209182567 U CN209182567 U CN 209182567U CN 201822088167 U CN201822088167 U CN 201822088167U CN 209182567 U CN209182567 U CN 209182567U
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- bent moon
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Abstract
The utility model relates to a kind of focal length infrared optics without thermalization camera lens, including bent moon negative lens A, bent moon positive lens B, bent moon positive lens C and the biconvex positive lens D set gradually along light incident direction；The airspace of the bent moon negative lens A and bent moon positive lens B is 4.1mm；The airspace of bent moon positive lens B and bent moon positive lens C is 39mm；The airspace of bent moon positive lens C and biconvex positive lens C is 6.2mm.It is compact-sized, light weight and cost is low, and the big target surface focal length infrared optics that can be produced in enormous quantities is without thermalization camera lens.
Description
Technical field
The utility model relates to a kind of focal length infrared optics without thermalization camera lens.
Background technique
With the development of infrared optics technology, infrared lens are widely used in dual-use field.This
Two fields be required to infrared lens image quality it is high, it is small in size, light-weight, under different temperatures environment keep working performance.
But for civil field, also requires camera lens at low cost and be able to achieve mass production.But most of length on current civil field
Burnt infrared no thermalization camera lens generallys use zinc selenide to realize achromatism and heat differential to be corrected.Due to bigbore selenium
It is at high cost to change zinc, is unable to satisfy the requirement of civil field low cost.
Summary of the invention
The purpose of this utility model is to provide a kind of focal length infrared optics without thermalization camera lens, it is compact-sized, light-weight, at
This is low, and the big target surface focal length infrared optics that can be produced in enormous quantities is without thermalization camera lens.
The technical solution of the utility model is: a kind of focal length infrared optics is without thermalization camera lens, including along light incidence side
To bent moon negative lens A, bent moon positive lens B, bent moon positive lens C and the biconvex positive lens D set gradually；The bent moon negative lens A
Airspace with bent moon positive lens B is 4.1mm；The airspace of bent moon positive lens B and bent moon positive lens C is 39mm；Bent moon
The airspace of positive lens C and biconvex positive lens C is 6.2mm.
Further, focal length is set as f, and the focal length of bent moon negative lens A is f1 and meets 3 < f1/f < 8.
Further, the focal length of the bent moon positive lens B is f2 and meets 0.5 < f2/f < 2.0.
Further, the focal length of the bent moon positive lens C is f3 and meets 1.0 < f3/f < 2.0.
Further, the focal length of the biconvex positive lens D is f4 and meets 0.5 < f4/f < 2.0.
Compared with prior art, the utility model has the advantage that the focal length infrared optics athermalism system, uses
Four-piece type structure, it is compact-sized, light weight and cost is low, reasonable distribution focal power, even aspheric surface is used in combination and diffraction surfaces come
Balance system aberration and heat differential, so that optical system is simple and compact for structure, image quality is more preferable, passes through curvature and the tune of thickness
The whole susceptibility for reducing each optical element, so that the camera lens is more readily processed and adjustment.And the system has biggish target
Face can shoot large range of scenery；System in conjunction with two kinds of materials of chalcogenide glass, utilizes the special color difference of diffraction surfaces using germanium
Zinc selenide is replaced with heat differential characteristic, while correcting telephoto lens color difference the image quality under high/low temperature condition is improved, it is real
The optics athermalism system of existing short and small light-duty low cost；Even aspheric surface is used in combination, preferably balance aberration, makes image quality into one
Step is promoted；By adjusting radius of curvature and lens thickness interval, the susceptibility of each optical element is reduced, so that the camera lens is easier to
Processing and adjustment.
Detailed description of the invention
Fig. 1 is the optical structure chart of the utility model；
Fig. 2 is the mtf value under the utility model normal temperature environment；
Fig. 3 is the mtf value under -40 DEG C of environment of the utility model low temperature；
Fig. 4 is the mtf value under 80 DEG C of environment of the utility model high temperature；
Fig. 5 is curvature of field distortion figure under the utility model room temperature；
In figure: A- bent moon negative lens A B- bent moon positive lens B C- bent moon positive lens C D- biconvex positive lens D.Specific implementation
Mode
In order to make the above-mentioned features and advantages of the utility model more obvious and understandable, special embodiment below, and cooperate attached drawing,
It is described in detail below, but the utility model is not limited to this.
Referring to figs. 1 to Fig. 5
A kind of focal length infrared optics is without thermalization camera lens, including the bent moon negative lens A, curved set gradually along light incident direction
Moon positive lens B, bent moon positive lens C and biconvex positive lens D；The airspace of the bent moon negative lens A and bent moon positive lens B is
4.1mm；The airspace of bent moon positive lens B and bent moon positive lens C is 39mm；The air of bent moon positive lens C and biconvex positive lens C
Between be divided into 6.2mm.
In the present embodiment, focal length is set as f, the focal length of bent moon negative lens A is f1 and meets 3 < f1/f < 8；The bent moon is just
The focal length of lens B is f2 and meets 0.5 < f2/f < 2.0；The focal length of bent moon positive lens C is f3 and meets 1.0 < f3/f < 2.0；It is double
The focal length of convex positive lens D is f4 and meets 0.5 < f4/f < 2.0.
In the present embodiment, this optical texture parallel flat is between D eyeglass and IMA project.
In the present embodiment, the specific performance parameter of this optical texture are as follows:
(1) focal length: EFFL=58mm；
(2) number=1.0 F；
(3) field angle: 2w >=19 °；
(4) optical distortion :≤2%；
(5) imaging circular diameter is equal to Ф 20；
(6) operating spectral range: 8um~12um；
(7) optics overall length TTL≤87mm, optics rear cut-off distance >=13.5mm；
(8) camera lens is suitable for 1280*1024,12um non-brake method Long Wave Infrared Probe.
In the present embodiment, optical component parameter table is as shown in table 1 below:
| Surface serial number | Radius of curvature (mm) | It is spaced (mm) | Material | Remarks |
| S1 | 50<R<70 | 5.3 | Germanium | |
| S2 | 50<R<60 | 4.1 | Diffraction surfaces | |
| S3 | 30<R<50 | 7.0 | Chalcogenide glass | It is aspherical |
| S4 | 60<R<80 | 39 | ||
| S5 | 20<R<40 | 8.6 | Germanium | It is aspherical |
| S6 | 30<R<40 | 6.2 | ||
| S7 | -160<R<-145 | 3.3 | Chalcogenide glass | |
| S8 | -110<R<-90 | It is aspherical |
In the present embodiment, aspherical and diffraction surfaces related data is as shown in table 2 below:
| Diffraction surfaces S2 | 1.823E-008 | -1.589E-010 | 4.727E-013 | -2.727E-016 |
| Aspherical S3 | -2.086E-007 | -3.247E-010 | 6.319E-013 | -4.028E-016 |
| Aspherical S5 | 4.142E-008 | 7.971E-010 | -1.445E-013 | 5.341E-015 |
| Aspherical S8 | 7.635E-006 | -5.692E-009 | 5.006E-011 | -5.331E-014 |
Aspherical expression formula are as follows:
Wherein, Z represents the position of optical axis direction, and r represents the height in the vertical direction of opposite optical axis, and c represents curvature half
Diameter, k represent circular cone coefficient,Represent asphericity coefficient.In aspherical surface data, E-n representative "", such as 1.823E-008 representative 。
Phase distribution function=M () in diffraction surfaces zemax:
| M | |||
| Diffraction surfaces S2 | 1 | -50.5 | -8.1 |
In the present embodiment, as seen from Figure 2, camera lens resolution ratio with higher meets 1280*1024, and 12um is non-
The biography of refrigeration detector needs to ask.Very little, realization it is found that camera lens MTF in the environment of high temperature and low temperature decays by Fig. 3, Fig. 4
The optics of camera lens is without thermalization performance.As shown in Figure 5, which meets distortion and requires.
The above is only the preferred embodiment of the present invention, it is all done according to present utility model application the scope of the patents it is equal
Deng variation and modification, it should all belong to the covering scope of the utility model.
Claims (5)
1. a kind of focal length infrared optics is without thermalization camera lens, which is characterized in that including the bent moon set gradually along light incident direction
Negative lens A, bent moon positive lens B, bent moon positive lens C and biconvex positive lens D；The sky of the bent moon negative lens A and bent moon positive lens B
4.1mm is divided between gas；The airspace of bent moon positive lens B and bent moon positive lens C is 39mm；Bent moon positive lens C and biconvex are just saturating
The airspace of mirror C is 6.2mm.
2. a kind of focal length infrared optics according to claim 1 is without thermalization camera lens, which is characterized in that set focal length as f, it is curved
The focal length of moon negative lens A is f1 and meets 3 < f1/f < 8.
3. a kind of focal length infrared optics according to claim 2 is without thermalization camera lens, which is characterized in that the bent moon positive lens
The focal length of B is f2 and meets 0.5 < f2/f < 2.0.
4. a kind of focal length infrared optics according to claim 2 or 3 is without thermalization camera lens, which is characterized in that the bent moon is just
The focal length of lens C is f3 and meets 1.0 < f3/f < 2.0.
5. a kind of focal length infrared optics according to claim 4 is without thermalization camera lens, which is characterized in that double convex positive lens
The focal length of D is f4 and meets 0.5 < f4/f < 2.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822088167.4U CN209182567U (en) | 2018-12-13 | 2018-12-13 | A kind of focal length infrared optics is without thermalization camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822088167.4U CN209182567U (en) | 2018-12-13 | 2018-12-13 | A kind of focal length infrared optics is without thermalization camera lens |
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| Publication Number | Publication Date |
|---|---|
| CN209182567U true CN209182567U (en) | 2019-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822088167.4U Active CN209182567U (en) | 2018-12-13 | 2018-12-13 | A kind of focal length infrared optics is without thermalization camera lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471240A (en) * | 2018-12-13 | 2019-03-15 | 福建福光天瞳光学有限公司 | A kind of focal length infrared optics athermalism system |
-
2018
- 2018-12-13 CN CN201822088167.4U patent/CN209182567U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471240A (en) * | 2018-12-13 | 2019-03-15 | 福建福光天瞳光学有限公司 | A kind of focal length infrared optics athermalism system |
| CN109471240B (en) * | 2018-12-13 | 2024-03-01 | 福建福光天瞳光学有限公司 | Long-focus infrared optical athermalization system |
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