CN106772960B - A kind of passive athermal optical system of intermediate waves broadband - Google Patents
A kind of passive athermal optical system of intermediate waves broadband Download PDFInfo
- Publication number
- CN106772960B CN106772960B CN201611094865.4A CN201611094865A CN106772960B CN 106772960 B CN106772960 B CN 106772960B CN 201611094865 A CN201611094865 A CN 201611094865A CN 106772960 B CN106772960 B CN 106772960B
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- lens
- optical system
- intermediate waves
- detector
- optical
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- 230000003287 optical effect Effects 0.000 title claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 35
- 239000002210 silicon-based material Substances 0.000 claims description 9
- 239000005083 Zinc sulfide Substances 0.000 claims description 6
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 6
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- OYLGJCQECKOTOL-UHFFFAOYSA-L barium fluoride Chemical compound [F-].[F-].[Ba+2] OYLGJCQECKOTOL-UHFFFAOYSA-L 0.000 claims description 3
- 229910001632 barium fluoride Inorganic materials 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 230000004075 alteration Effects 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract 1
- 206010010071 Coma Diseases 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000005855 radiation Effects 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
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Abstract
The present invention relates to a kind of passive athermal optical systems of intermediate waves broadband, and using the Polaroid system configuration of straight barrel type, optical system is made of seven lens.Suitable optical material and the suitable radius of curvature of selection and lens separation are selected to correct the cold emission of optical system；Using aspherical special face type, setting optimizes program to correct the primary aberration and higher order aberrations of optical system, achievees the purpose that image quality optimizes；Suitable optical material, structural material are selected, is changed by optical material refractive index temperature and the thermal expansion variation of optical material is cancelled out each other with structural material thermal expansion variation, realize wide temperature range passively without thermalized design.
Description
Technical field
The invention belongs to optical technical fields, are related to a kind of passive athermal optical system of intermediate waves broadband.
Background technique
Absorption due to atmosphere to infra-red radiation, main there are three important atmospheric windows, are distributed in 0.75-2.5 μm
In near-infrared, 3-5 μm of medium-wave infrared and 8-14 μm three wavelength bands of LONG WAVE INFRARED.Traditional infrared imaging system is general
The wave band of work is relatively narrow, and the information content of acquisition is limited, therefore, in conjunction with the imaging characteristics of each wave band, works in broadband red
Outer optical system can obtain sufficiently useful information, and effectively object can be identified from a large amount of image,
Very important status can be played in target identification detection.But it is infrared that existing optical system does not account for intermediate waves broadband
In optical system without thermalization problem, cause the image quality under high and low temperature environment poor.Cannot work at the same time in medium-wave band and
Short-wave band, there are the limitations that single wave band infrared system obtains information.
Summary of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of passive athermal optical system of intermediate waves broadband
System overcomes single wave band infrared system to obtain the limitation of information, while solving in intermediate waves broadband infrared optical system
Without thermalization problem.
Technical solution
A kind of passive athermal optical system of intermediate waves broadband, it is characterised in that the first lens 1, the second lens 2, third
Lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6 and the 7th lens 7；Being arranged successively from object space to image space along optical axis is
One lens 1, the second lens 2, the third lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6 and the 7th lens 7；Seven lens
Parameter are as follows: the first lens 1 be negative-power lenses, the second lens 2 be positive power lens, the third lens 3 be positive light coke
Lens, the 4th lens 4 are negative-power lenses, and the 5th lens 5 are positive power lens, and the 6th lens 6 are negative-power lenses,
7th lens 7 are positive power lens.
7th lens, 7 rear end is equipped with detector, the aperture diaphragm of the optical system of the cold stop of detector and seven lens
It is overlapped.
The detector is intermediate waves broadband refrigeration mode detector.
Seven lens and detector one are placed in the lens barrel of titanium alloy material.
The glass material of seven lens is arranged in pairs or groups are as follows: the first lens 1 are zinc sulphide materials, and the second lens 2 are barium fluoride
Material, the third lens 3 are silicon materials, and the 4th lens 4 are calcium fluoride material, and the 5th lens 5 are zinc sulphide materials, the 6th lens 6
For silicon materials, the 7th lens 7 are selenizing Zinc material.
The parameter of the detector optical window plane are as follows:
According to the passive athermal optical system of the intermediate waves broadband of claim 2 or 6, it is characterised in that: the spy
The material for surveying device optical window plane is silicon materials.
The parameter of seven lens are as follows:
Beneficial effect
The passive athermal optical system of a kind of intermediate waves broadband proposed by the present invention, using the Polaroid system of straight barrel type
Configuration, optical system are made of seven lens.Select suitable optical material and the suitable radius of curvature of selection and lens
It is spaced to correct the cold emission of optical system；Using aspherical special face type, setting optimizes program to correct the first of optical system
Grade aberration and higher order aberrations achieve the purpose that image quality optimizes；Suitable optical material, structural material are selected, optics is passed through
The thermal expansion variation of Refractive Index of Material temperature change and optical material is cancelled out each other with structural material thermal expansion variation, realizes wide temperature
Range is spent passively without thermalized design.
By the present invention in that increasing the freedom degree during Optical System Design with multiple aspherical, coordinate correction system
Coma, spherical aberration, the astigmatism of system, greatly improve image quality.The material of passive athermal optical system is reasonably combined, and optical system is made to exist
- 40 DEG C~+60 DEG C holding high quality imagings of temperature range, the wave-length coverage of infrared optical system is 1.4 μm~5.1 μm, covering
Medium-wave band and short-wave band.
The invention has the advantages that intermediate waves broadband is imaged in the present invention, the recognition efficiency of target is improved, is reduced
False alarm rate；Using aspheric design, the selectable variable of optimization design increases, and aberration design is easily obtained excellent image quality；It adopts
Athermal match materials are carried out with five kinds of infrared optical materials, using non-spherical lens group come spherical aberration corrector, coma, astigmatism, are not had
Have using diffraction surfaces；Structure simplifies: system uses seven lens, and straight barrel type configuration is compact-sized, greatly reduces technique and wants
It asks；Ray machine adjustment is convenient: the component in optical path is fixation member, and adjustment is simple, largely reduces the adjustment of system
Difficulty.
Detailed description of the invention
Fig. 1 is infrared optical system index path of the present invention
Specific embodiment
Now in conjunction with embodiment, attached drawing, the invention will be further described:
It is as shown in Figure 1 the light of the seven passive athermal infrared optical systems of chip intermediate waves broadband designed by the present invention
Lu Tu is arranged successively from object space to image space along optical axis as the first lens 1, negative-power lenses, using zinc sulphide materials；Second thoroughly
Mirror 2 is positive power lens, using barium fluoride material；The third lens 3 are positive power lens, using silicon materials；4th thoroughly
Mirror 4 is negative-power lenses, using calcium fluoride material；5th lens 5, positive power lens, using zinc sulphide materials；6th
Lens 6 are negative-power lenses, using silicon materials；7th lens 7 are positive power lens, using selenizing Zinc material；
7th lens, 7 rear end is equipped with detector, and detector is intermediate waves broadband refrigeration mode detector, the cold light of detector
Door screen is overlapped with the aperture diaphragm of the optical system of seven lens.Detector optical window plane 8 uses silicon materials, is imaged on detector coke
In plane 9.
Optical system lens barrel material uses titanium alloy material.The design parameter of the optical system is as shown in the table:
Claims (6)
1. a kind of passive athermal optical system of intermediate waves broadband, it is characterised in that the first lens (1), the second lens (2),
Three lens (3), the 4th lens (4), the 5th lens (5), the 6th lens (6) and the 7th lens (7)；From object space to image space along optical axis
It is arranged successively as the first lens (1), the second lens (2), the third lens (3), the 4th lens (4), the 5th lens (5), the 6th thoroughly
Mirror (6) and the 7th lens (7)；The parameter of seven lens are as follows: the first lens (1) are negative-power lenses, and the second lens (2) are positive
Power lenses, the third lens (3) are positive power lens, and the 4th lens (4) are negative-power lenses, and the 5th lens (5) are
Positive power lens, the 6th lens (6) are negative-power lenses, and the 7th lens (7) are positive power lens；
The glass material of seven lens is arranged in pairs or groups are as follows: the first lens (1) are zinc sulphide materials, and the second lens (2) are barium fluoride
Material, the third lens (3) be silicon materials, the 4th lens (4) be calcium fluoride material, the 5th lens (5) be zinc sulphide materials, the 6th
Lens (6) are silicon materials, and the 7th lens (7) are selenizing Zinc material；
The parameter of seven lens are as follows:
2. the passive athermal optical system of intermediate waves broadband according to claim 1, it is characterised in that: the 7th lens (7)
Rear end is equipped with detector, and the cold stop of detector is overlapped with the aperture diaphragm of the optical system of seven lens.
3. the passive athermal optical system of intermediate waves broadband according to claim 2, it is characterised in that: the detector is
Intermediate waves broadband refrigeration mode detector.
4. the passive athermal optical system of intermediate waves broadband according to claim 1 or claim 2, it is characterised in that: described seven
Lens and detector one are placed in the lens barrel of titanium alloy material.
5. the passive athermal optical system of intermediate waves broadband according to claim 2, it is characterised in that: the detector light
The parameter of window plane are as follows:
6. according to the passive athermal optical system of the intermediate waves broadband of claim 2 or 5, it is characterised in that: the detection
The material of device optical window plane is silicon materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611094865.4A CN106772960B (en) | 2016-12-02 | 2016-12-02 | A kind of passive athermal optical system of intermediate waves broadband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611094865.4A CN106772960B (en) | 2016-12-02 | 2016-12-02 | A kind of passive athermal optical system of intermediate waves broadband |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106772960A CN106772960A (en) | 2017-05-31 |
| CN106772960B true CN106772960B (en) | 2019-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611094865.4A Active CN106772960B (en) | 2016-12-02 | 2016-12-02 | A kind of passive athermal optical system of intermediate waves broadband |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556734A (en) * | 2018-11-09 | 2019-04-02 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of intermediate waves broadband thermal infrared imager |
| CN111505801B (en) * | 2020-05-18 | 2021-09-14 | 吉林工程技术师范学院 | Medium wave infrared optical system |
| CN114236782B (en) * | 2021-11-17 | 2023-04-18 | 中航洛阳光电技术有限公司 | Visible light near-infrared short wave broadband optical system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012198506A (en) * | 2011-03-07 | 2012-10-18 | Panasonic Corp | Zoom lens system, imaging device, and camera |
| CN102338927B (en) * | 2010-07-14 | 2013-08-21 | 佳能株式会社 | Zoom lens and image pickup apparatus equipped with zoom lens |
| CN104749773A (en) * | 2015-03-31 | 2015-07-01 | 中国科学院上海技术物理研究所 | Minus 60 DEG C to 80 DEG C infrared ultra wide temperature range heat difference elimination optical system |
| CN106019534A (en) * | 2016-06-27 | 2016-10-12 | 湖北久之洋红外系统股份有限公司 | 1.3-5um broadband infrared imaging lens |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012198503A (en) * | 2011-03-07 | 2012-10-18 | Panasonic Corp | Zoom lens system, imaging device, and camera |
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2016
- 2016-12-02 CN CN201611094865.4A patent/CN106772960B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338927B (en) * | 2010-07-14 | 2013-08-21 | 佳能株式会社 | Zoom lens and image pickup apparatus equipped with zoom lens |
| JP2012198506A (en) * | 2011-03-07 | 2012-10-18 | Panasonic Corp | Zoom lens system, imaging device, and camera |
| CN104749773A (en) * | 2015-03-31 | 2015-07-01 | 中国科学院上海技术物理研究所 | Minus 60 DEG C to 80 DEG C infrared ultra wide temperature range heat difference elimination optical system |
| CN105157851A (en) * | 2015-03-31 | 2015-12-16 | 中国科学院上海技术物理研究所 | Minus 60 DEG C to 80 DEG C infrared ultra wide temperature range heat difference elimination optical system |
| CN106019534A (en) * | 2016-06-27 | 2016-10-12 | 湖北久之洋红外系统股份有限公司 | 1.3-5um broadband infrared imaging lens |
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| CN106772960A (en) | 2017-05-31 |
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