CN206282022U - Object lens of large relative aperture refrigeration mode infrared optical lens - Google Patents
Object lens of large relative aperture refrigeration mode infrared optical lens Download PDFInfo
- Publication number
- CN206282022U CN206282022U CN201621120185.0U CN201621120185U CN206282022U CN 206282022 U CN206282022 U CN 206282022U CN 201621120185 U CN201621120185 U CN 201621120185U CN 206282022 U CN206282022 U CN 206282022U
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- Prior art keywords
- lens
- infrared
- relative aperture
- large relative
- refrigeration mode
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- 230000003287 optical effect Effects 0.000 title claims abstract description 28
- 238000005057 refrigeration Methods 0.000 title claims abstract description 17
- 238000003331 infrared imaging Methods 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 230000001629 suppression Effects 0.000 claims description 2
- 238000009738 saturating Methods 0.000 claims 1
- 230000003068 static effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 210000003361 heart septum Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Lenses (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
This patent discloses a kind of object lens of large relative aperture refrigeration mode infrared optical lens, the invention uses three Infrared Lens, wherein first piece Infrared Lens and second Infrared Lens to work in normal temperature, and the 3rd Infrared Lens are placed in after system stop, it is integrated in cooled cryostat, works in low temperature.The infrared optical lens that this patent is provided are capable of achieving the matched well of diaphragm and the cold screen of refrigeration mode detector while realizing that object lens of large relative aperture (F numbers are not more than 1.0) is imaged.The utility model can be used for the application scenario all having high requirements to temperature control and response speed.
Description
Technical field
This patent is related to a kind of object lens of large relative aperture (F numbers are not more than 1.0) infrared optical lens, and in particular to one kind can be with system
The F numbers of the cold screen matching of cold mould detector assembly are not more than 1.0 infrared optical lens.
Background technology
The F numbers of infrared optical lens determine the energy harvesting capabilities of infrared system, so that turning into influence system detects spirit
One of key factor of sensitivity.F numbers determine the limit resolution capability of system, i.e. diffraction limit simultaneously.
IRDS can be divided into refrigeration mode and non-refrigeration type according to type photodetector.Non-refrigeration type infrared optics mirror
Head is because without the concern for the matching of cold screen, F numbers can typically be designed into 1.0, and particular design even can be to 0.8 or so.Refrigeration mode
Infrared optical lens are matched emergent pupil with the cold screen of the Dewar of detector assembly due to needing, and limit optical optimization parameter, F
Number is typically only capable to accomplish 2.0.When visual field is smaller, by particular design, F numbers can also reach 1.5.
In order to improve the image analytic degree of infrared system, it is that a technology becomes that the pixel dimension of Infrared Detectors progressively reduces
Gesture.In the case where pixel dimension reduces, the F numbers for reducing system are to ensure that detectivity, response speed, image definition etc.
The important means that index is not reduced or increased.
《Infrared technique》2nd phase in 2015 (volume 37) discloses one kind《Object lens of large relative aperture refrigeration mode infrared camera camera lens
Optical design》, F numbers are 1.5, and the design optical texture is more long, and remaining geometrical aberration is larger.
The F numbers of the infrared optical lens that this patent is proposed can reach 1.0 even more small, can meet 15 μm of pixel dimension,
The infrared optical system application of even more small pixel dimension, can apply to the field higher to performance requirement.
The content of the invention
The purpose of this patent is to provide the object lens of large relative aperture infrared optical lens that a kind of F numbers are not more than 1.0, and camera lens
Diaphragm and the cold screen of refrigeration mode detector assembly can matched well, to meet part special dimension to temperature control, response
The requirements at the higher level of the performance indications such as speed, the present invention is also for the application of small pixel Infrared Detectors provides a solution.
The technical scheme that this patent is used is：A kind of transmission-type object lens of large relative aperture infrared imaging light path, referring to Fig. 1, be
System light path include the first normal temperature infrared lens 1, the second normal temperature infrared lens 2, infrared window 3, low temperature cold screen 4, lower temperature lens 5,
Detector photosurface 6, cooled cryostat cavity 7, wherein：
The first described normal temperature infrared lens 1 are germainium lens.
The second described normal temperature infrared lens 2 are ZnS lens.
Described infrared window 3 is germanium window.
Described low temperature Infrared Lens 5 are germainium lens.
Imaging beam from object space sequentially passes through the first normal temperature infrared lens 1, the second normal temperature infrared lens 2, infrared window
Mouth 3, low temperature cold screen 4, low temperature Infrared Lens 5 finally image in detector photosurface 6；The relative aperture number F of system is not more than 1；
Described low temperature Infrared Lens 5 and low temperature cold screen 4 are placed within cooled cryostat cavity 7, and low temperature cold screen 4 is opened
Mouth matches with the diaphragm of object lens of large relative aperture infrared imaging light path, realizes the good suppression of stray radiation.
The advantage of this patent is：
Light channel structure is compact, is capable of achieving object lens of large relative aperture (F numbers are not more than 1.0) infrared imaging, preferably meets refrigeration mode
Detector high sensitivity infrared acquisition demand.
Brief description of the drawings
Fig. 1 is object lens of large relative aperture refrigeration mode infrared lens light channel structure figure.Wherein：
1 --- normal temperature infrared lens 1；
2 --- normal temperature infrared lens 2；
3 --- infrared window 3；
4 --- low temperature cold screen 4；
5 --- lower temperature lens 5；
6 --- detector photosurface 6；
7 --- Dewar cavity 7.
Fig. 2 is focal length 30mmF#1.0 object lens of large relative aperture LONG WAVE INFRARED lens optical design drawings.
Fig. 3 is focal length 30mmF#1.0 object lens of large relative aperture LONG WAVE INFRARED camera lens modulation transfer functions.
Fig. 4 is focal length 30mmF#0.9 object lens of large relative aperture LONG WAVE INFRARED lens optical design drawings.
Fig. 5 is focal length 30mmF#0.9 object lens of large relative aperture LONG WAVE INFRARED camera lens modulation transfer functions.
Specific embodiment
According to above-mentioned technical proposal, a set of object lens of large relative aperture LONG WAVE INFRARED camera lens is devised.
Specific optical parametric includes：F#=1.0, service band is 8.0 μm -12.5 μm, bore 30mm, focal length 30mm, depending on
Rink corner ± 7.5 °, optical texture is as shown in Figure 2.
Object lens of large relative aperture LONG WAVE INFRARED lens wearer parameter such as following table：
| Surface | Face type | Radius of curvature (mm) | Middle heart septum (mm) | Size (mm) | Material |
| The face of first normal temperature infrared lens 1 first | Sphere | 54.588 | 4.0 | Diameter 53 | Ge |
| The face of first normal temperature infrared lens 1 second | Sphere | 80.096 | 0.1 | Diameter 51 | - |
| The face of second normal temperature infrared lens 2 first | Sphere | 18.639 | 5.494 | Diameter 53 | ZnS |
| The face of second normal temperature infrared lens 2 second | Sphere | 13.411 | 22.0 | Diameter 51 | - |
| The face of infrared window 3 first | Plane | It is infinitely great | 1.0 | 15 | Ge |
| The face of infrared window 3 second | Plane | It is infinitely great | 3.02 | 15 | - |
| Low temperature cold screen 4 | Plane | It is infinitely great | 11.184 | 12.2 | - |
| The face of lower temperature lens 5 first | Sphere | 22.775 | 4.0 | Diameter 15 | Ge |
| The face of lower temperature lens 5 second | Sphere | 48.409 | 5.748 | Diameter 15 | - |
| Detector photosurface | Plane | It is infinitely great | - | - |
Wherein, low temperature cold screen 4, lower temperature lens 5, detector photosurface is respectively positioned in Dewar cavity 7.
Detector photosurface is the μ of 20 μ m 20 using 256 × 256 faces battle array cadmium-telluride-mercury infrared detector, pixel dimension size
M, corresponding nyquist frequency is 25lp/mm.
After through optical software optimization design, as of fine quality good, static transmission function is better than 0.5, referring to accompanying drawing 3.
It is standard two by the surface optimization of the first normal temperature infrared lens 1 and low temperature Infrared Lens 5 according to above-mentioned technical proposal
Secondary conical surface, the performance of above-mentioned optical system can be lifted further, and major parameter is as follows：
Specific optical parametric includes：F#=0.9, service band is 8.0 μm -12.5 μm, bore 33.3mm, focal length 30mm,
The angle of visual field ± 7.5 °.
Optimized design, picture quality can be limited close to diffraction, and in spatial frequency 50lp/mm, static state passes letter and is not less than
0.35, disclosure satisfy that the corrugated long battle array angle plane imaging that pixel dimension is 10 μm.Although introducing 4 non-spherical surfaces, processing
Difficulty slightly has raising, but available now very ripe diamond point turner skill processing, can realize completely.
Corresponding optical design is as shown in figure 4, static transmission function is as shown in figure 5, lens wearer parameter such as following table：
Claims (5)
1. a kind of object lens of large relative aperture refrigeration mode infrared optical lens, including the first normal temperature infrared lens (1), the second normal temperature infrared is saturating
Mirror (2), infrared window (3), low temperature cold screen (4), low temperature Infrared Lens (5), detector photosurface (6), cooled cryostat cavity
(7), it is characterised in that：
The imaging beam from object space of the object lens of large relative aperture infrared optical lens sequentially passes through the first normal temperature infrared lens
(1), the second normal temperature infrared lens (2), infrared window (3), low temperature cold screen (4), low temperature Infrared Lens (5) finally image in spy
Survey device photosurface (6)；The relative aperture number F of system is not more than 1；
Described low temperature Infrared Lens (5) and low temperature cold screen (4) are placed within cooled cryostat cavity (7), and low temperature cold screen (4)
Opening match with the diaphragm of object lens of large relative aperture infrared imaging light path, realize the good suppression of stray radiation.
2. a kind of object lens of large relative aperture refrigeration mode infrared optical lens according to claim 1, it is characterised in that：Described
One normal temperature infrared lens (1) are germainium lens.
3. a kind of object lens of large relative aperture refrigeration mode infrared optical lens according to claim 1, it is characterised in that：Described
Two normal temperature infrared lens (2) are ZnS lens.
4. a kind of object lens of large relative aperture refrigeration mode infrared optical lens according to claim 1, it is characterised in that：Described is red
Outer window (3) is germanium window.
5. a kind of object lens of large relative aperture refrigeration mode infrared optical lens according to claim 1, it is characterised in that：Described is low
Warm Infrared Lens (5) are germainium lens.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610406766.9A CN105911676A (en) | 2016-06-12 | 2016-06-12 | Large-relative-aperture refrigeration-type infrared optical lens |
| CN2016104067669 | 2016-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206282022U true CN206282022U (en) | 2017-06-27 |
Family
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610406766.9A Pending CN105911676A (en) | 2016-06-12 | 2016-06-12 | Large-relative-aperture refrigeration-type infrared optical lens |
| CN201610894151.5A Active CN106443981B (en) | 2016-06-12 | 2016-10-13 | A kind of object lens of large relative aperture refrigeration mode infrared optical lens |
| CN201621120185.0U Expired - Fee Related CN206282022U (en) | 2016-06-12 | 2016-10-13 | Object lens of large relative aperture refrigeration mode infrared optical lens |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610406766.9A Pending CN105911676A (en) | 2016-06-12 | 2016-06-12 | Large-relative-aperture refrigeration-type infrared optical lens |
| CN201610894151.5A Active CN106443981B (en) | 2016-06-12 | 2016-10-13 | A kind of object lens of large relative aperture refrigeration mode infrared optical lens |
Country Status (1)
| Country | Link |
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| CN (3) | CN105911676A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443981A (en) * | 2016-06-12 | 2017-02-22 | 中国科学院上海技术物理研究所 | Large relative aperture refrigeration type infrared optical lens |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107357028B (en) * | 2017-07-04 | 2022-08-19 | 西安中科立德红外科技有限公司 | Wide temperature range's optics does not have camera lens of heating |
| CN109407289A (en) * | 2017-08-17 | 2019-03-01 | 北京遥感设备研究所 | A kind of refraction-reflection type Low emissivity optical system for remote low background detections |
| CN110161663B (en) * | 2019-04-22 | 2020-04-03 | 中国科学院西安光学精密机械研究所 | Refrigeration type athermal infrared fisheye optical system |
| CN115236852B (en) * | 2022-08-16 | 2024-01-26 | 中国科学院上海技术物理研究所 | Optical compensation device of all-optical-path low-temperature system and design method |
| CN117389022B (en) * | 2023-12-13 | 2024-03-29 | 之江实验室 | Telescope optical system and optical imaging method |
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| US4380363A (en) * | 1981-04-03 | 1983-04-19 | Rockwell International Corporation | Four element infrared objective lens |
| US4783593A (en) * | 1985-12-26 | 1988-11-08 | General Electric Company | Optical system for wide angle IR imager |
| US6989537B2 (en) * | 2003-11-18 | 2006-01-24 | Raytheon Company | Compact inverse-telephoto infrared imaging optical system |
| US20050264873A1 (en) * | 2004-05-26 | 2005-12-01 | Hall John M | Optical imager for the 3-5 micron spectral band |
| US8101918B1 (en) * | 2009-05-13 | 2012-01-24 | Itt Manufacturing Enterprises, Inc. | Re-imaging infrared lenses |
| US9291506B2 (en) * | 2010-01-27 | 2016-03-22 | Ci Systems Ltd. | Room-temperature filtering for passive infrared imaging |
| JP5993604B2 (en) * | 2012-04-25 | 2016-09-14 | 株式会社タムロン | Infrared optical system |
| CN102928088B (en) * | 2012-11-01 | 2015-07-29 | 中国科学院上海技术物理研究所 | A kind of poly-lens profound hypothermia infrared detector package structure be encapsulated in Dewar |
| CN104535193A (en) * | 2014-12-22 | 2015-04-22 | 中国电子科技集团公司第十一研究所 | Infrared focal plane detector component |
| CN105044887B (en) * | 2015-06-02 | 2018-02-16 | 中国科学院上海技术物理研究所 | A kind of refrigeration mode object lens of large relative aperture ultra-wide angle infrared optical system |
| CN105911676A (en) * | 2016-06-12 | 2016-08-31 | 中国科学院上海技术物理研究所 | Large-relative-aperture refrigeration-type infrared optical lens |
-
2016
- 2016-06-12 CN CN201610406766.9A patent/CN105911676A/en active Pending
- 2016-10-13 CN CN201610894151.5A patent/CN106443981B/en active Active
- 2016-10-13 CN CN201621120185.0U patent/CN206282022U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443981A (en) * | 2016-06-12 | 2017-02-22 | 中国科学院上海技术物理研究所 | Large relative aperture refrigeration type infrared optical lens |
| CN106443981B (en) * | 2016-06-12 | 2019-03-01 | 中国科学院上海技术物理研究所 | A kind of object lens of large relative aperture refrigeration mode infrared optical lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105911676A (en) | 2016-08-31 |
| CN106443981B (en) | 2019-03-01 |
| CN106443981A (en) | 2017-02-22 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20170627 |