CN202305014U - Low temperature infrared interferometer - Google Patents
Low temperature infrared interferometer Download PDFInfo
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- CN202305014U CN202305014U CN2011202589489U CN201120258948U CN202305014U CN 202305014 U CN202305014 U CN 202305014U CN 2011202589489 U CN2011202589489 U CN 2011202589489U CN 201120258948 U CN201120258948 U CN 201120258948U CN 202305014 U CN202305014 U CN 202305014U
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Abstract
The invention discloses a low temperature infrared interferometer including a moving lens module, a fixed lens module, a beam splitter module, an interferometer frame, a heat transmission plate, a heat insulation support cylinder, an optical path difference metering system represented by a frequency stabilized laser, a moving lens locking device represented by a pneumatic element and a gas holder, and an interferometer installing substrate. The low temperature infrared interferometer can work in low temperature of 200 K.
Description
Technical field
This patent relates to space photoelectricity technical device, specifically refers to a kind of low temperature infrared interferometer, it be applied to working temperature in the space of 200-205K infrared Fourier conversion spectrum detection instrument, this instrument is used for the satellite atmosphere remote sensing.
Background technology
For satellite atmosphere remote sensing appearance, traditional is the optical filtering chip, on earth SSO (Sun Synchronous Orbit) track, is replaced by space infrared Fourier conversion spectrum detection instrument gradually at present.For example the IASI in Europe and the CrIS of the U.S. have been the Fourier trasform spectroscopy detection instrument.On the geostationary orbit, the GOES-I to GOES-N of the U.S. is the optical filtering chip, but also will be replaced by the Fourier trasform spectroscopy detection instrument of a new generation, and among developing like the MTG in Europe, it is a Fourier transform.The characteristics of Fourier transform spectrometer are that spectral resolution is high a lot.This infrared Fourier transform spectrometer all has the index glass of motion, as the modulating part of optical path difference.Because the liftoff ball of earth SSO (Sun Synchronous Orbit) track is nearer, signal is stronger, so the interferometer of IASI and CrIS is not a low temperature.With respect to earth SSO (Sun Synchronous Orbit) track, the distance of the liftoff ball of geostationary orbit is big 45 times, thereby many a little less than the signal.As adopt the low temperature interferometer, but the Infrared background radiation of lowering apparatus self, the sensitivity that will improve instrument like this.
IASI goes up to the sky, and it adopts the catoptron of angle mirror as interferometer.This structure is so not harsh to the requirement of physical construction and index glass mechanism, but with respect to the plane mirror structure, light returns from angle mirror will pass through triple reflection, and flat mirror reflects mirror structure only need reflect once.
The space interference appearance the most approaching with this patent is CrIS, and it adopts the plane mirror parallel moving mechanism.But it is the normal temperature interferometer, and structure lower temperature interferometer is simple, does not have the cryogenic optics technology inside.Usually the basic function and the critical piece of index glass formula Fourier spectrometer all are roughly the same: index glass, horizontal glass, beam splitter, optical path difference gauging system etc.But this patent has designed the low temperature interferometer, has used low temperature structure to carry out horizontal glass angle re-graduation module under the low temperature with having added.This low temperature interferometer is suitable for low light level spectrum signal and measures.
Summary of the invention
The purpose of this patent provides a kind of space low temperature interferometer, and its infrared background signal is little than the normal temperature interferometer, can be used to survey more weak spectral signal, satisfies the demand of geostationary orbit infrared Fourier spectrometer appearance in the future.
The technical scheme of this patent is following:
The low temperature interferometer scheme is shown in accompanying drawing 1, and it is that the optical path difference gauging system of representative, the index glass locking device, interferometer installation base plate 11 that is representative with pneumatic element 8 and air drum 10 etc. are formed by index glass module 7, horizontal glass module 4, splitter module 6, interferometer framework 5, heat transfer plate 3, cold chain interface 12, heat insulation support tube 2, with frequency stabilized laser 9.
Described index glass module 7 is made up of parallel moving mechanism and plane mirror;
Described horizontal glass module 4 is become with the plane reflector group by bidimensional angular adjustment frame;
Described splitter module 6 is made up of optical beam splitting sheet, compensating plate and retainer;
The optical path difference gauging system is made up of frequency stabilized laser 9, laser detector 1 and wave plate and some catoptrons;
Described index glass locking device is made up of pneumatic element, air drum, solenoid valve, pressure transducer and some pipelines and joint;
Be divided into the two large divisions on the interferometer structure, a part is the part of heat insulation support tube 2 tops, and it is the cryogenic optics part, and low temperature is through 12 couplings of cold chain interface, and another part is the part of heat insulation support tube 2 belows, and it is the normal temperature part; Added the bidimensional angle adjusting mechanism in the interferometer of this patent, after temperature reduces, started angle adjusting mechanism, two interfering beams are got back to and are parallel to each other in the school once more; The parallel moving mechanism of index glass module 7 adopts flexible member supporting movement part; The laser instrument of optical path difference metric module and laser detector are positioned over and are installed on the normal temperature installation base plate 11; The pneumatic element 8 of locking module is at low-temperature space, and remainder is in the normal temperature district; Pneumatic element 8 is processed by the nonmetallic materials of the isolation that is beneficial to cold and hot zone with the tracheae that is connected between the gas-holder 10.
The index glass module is made up of parallel moving mechanism and plane mirror, and the horizontal glass module is become with the plane reflector group by bidimensional angular adjustment frame, and splitter module is made up of optical beam splitting sheet, compensating plate and retainer.Index glass module, horizontal glass module and splitter module constitute basic interferometer; Heat transfer plate is connected with cold chain, and the interferometer temperature is descended, and forms low temperature.The optical path difference gauging system is made up of frequency stabilized laser 9, laser detector 1 and wave plate and some catoptrons.The index glass locking system is made up of pneumatic element, air drum, solenoid valve, pressure transducer and some pipelines and joint, when its function is the detection instrument emission index glass is locked release after satellite is entered the orbit.
The principle of work that the low temperature interferometer of this patent produces interferogram is consistent with the principle of work that the normal temperature interferometer produces interferogram, i.e. index glass motion generation time interferometric modulator figure.Structurally with normal temperature interferometer separated into two parts, a part is the infrared band interferometer part of low temperature, and it mainly comprises index glass module 7, horizontal glass module 4, splitter module 6 and interferometer framework 5, uses heat insulation structural to support it.Another part is the optical path difference tolerance part and the gas-operated lock limiting-members of normal temperature, and they comprise that mainly frequency stabilized laser 9 is the index glass locking device, interferometer installation base plate 11 etc. of representative for the optical path difference gauging system of representative, with pneumatic element 8 and air drum 10.These parts there is no need low-temperature working, and wherein laser instrument can not be at low-temperature working.Two-part mechanical connection is heat insulation support tube 2 and heat transfer plate 3.Through cold chain interface 12 infrared interferometer partly is connected on the low-temperature receiver, makes the infrared part of interferometer form low temperature.From normal temperature to low temperature, Wen Bianhui causes malformation and optical element distortion.In the present invention, the method that solves malformation is in the horizontal glass module, to have designed bidimensional angular adjustment system, temperature cool down stable after, start the bidimensional regulating system, the light beam regulation that two bundles are participated in interfering is to parallel; The method that solves the optical element distortion is the support that becomes optical element with the combination of materials of different heat expansion coefficient; Do not change pretightning force when making temperature variation to optical element; Low temperature causes that the size of optical element changes like this, but does not cause that optical element face shape changes, because the optical element of low-temperature space all is a level crossing; Thereby as long as face shape is constant, just to not influence of interferometer performance.
The advantage of this patent is that this low temperature interferometer and normal temperature interferometer compare, and the infrared background of generation is little, and it helps the detection of low light level spectrum signal.
Description of drawings
Fig. 1: low temperature interferometer;
Among the figure:
1---laser detector;
2---heat insulation support tube;
3---heat transfer plate;
4---the horizontal glass module;
5---the interferometer framework;
6---splitter module;
7---the index glass module;
8---pneumatic element;
9---frequency stabilized laser;
10---air drum;
11---the interferometer installation base plate;
12---the cold chain interface.
Embodiment
The structure example of this patent is seen Fig. 1, and it is used for geostationary orbit interfere type SEQUENCING VERTICAL detection instrument, produces atmosphere infrared interference signal.Major parameter is: low-temperature space comprises index glass module 7, horizontal glass module 4 splitter modules 6, interferometer framework 5, pneumatic element 8 and heat transfer plate 3 etc., and temperature is 200K.The critical piece in all the other normal temperature zones comprises that the temperature of laser instrument 1, interferometer installation base plate and air drum 10 etc. is 295K.Interferometer clear aperture 40mm, 8 ° of field angle.Thin cylinder is made in heat insulation support, diameter phi 223mm, and height 94mm, wall thickness 1mm, slightly tapered, low Heat Conduction Material.The heat of low-temperature space is given cold chain through heat transfer plate 3 through the cold link oral instructions, passes to space radiant cooler from cold chain through Cryo Heat Tube again.
Claims (1)
1. low temperature infrared interferometer; It comprises: index glass module (7), horizontal glass module (4), splitter module (6), interferometer framework (5), heat transfer plate (3), cold chain interface (12), heat insulation support tube (2), with frequency stabilized laser (9), the index glass locking device that comprises pneumatic element (8) and air drum (10) and interferometer installation base plate (11) is characterized in that:
Described index glass module (7) is made up of parallel moving mechanism and plane mirror;
Described horizontal glass module (4) is become with the plane reflector group by bidimensional angular adjustment frame;
Described splitter module (6) is made up of optical beam splitting sheet, compensating plate and retainer;
Index glass module (7), horizontal glass module (4) and splitter module (6) constitute basic interferometer; Heat transfer plate (3) is connected with cold chain, and the interferometer temperature is descended, and forms low temperature;
The optical path difference gauging system is made up of frequency stabilized laser (9), laser detector (1) and wave plate and some catoptrons;
Described index glass locking device is made up of pneumatic element, air drum, solenoid valve, pressure transducer and some pipelines and joint;
Be divided into the two large divisions on the interferometer structure, a part is the part of heat insulation support tube (2) top, and it is the cryogenic optics part, and low temperature is through cold chain interface (12) coupling, and another part is the part of heat insulation support tube (2) below, and it is the normal temperature part; Added the bidimensional angle adjusting mechanism in the interferometer of this patent, after temperature reduces, started angle adjusting mechanism, two interfering beams are got back to and are parallel to each other in the school once more; The parallel moving mechanism of index glass module (7) adopts flexible member supporting movement part; The laser instrument of optical path difference metric module and laser detector are positioned over and are installed on the normal temperature installation base plate (11); The pneumatic element of locking module (8) is at low-temperature space, and remainder is in the normal temperature district; Pneumatic element (8) is processed by the nonmetallic materials of the isolation that is beneficial to cold and hot zone with the tracheae that is connected between the gas-holder (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202589489U CN202305014U (en) | 2011-07-21 | 2011-07-21 | Low temperature infrared interferometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202589489U CN202305014U (en) | 2011-07-21 | 2011-07-21 | Low temperature infrared interferometer |
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| CN202305014U true CN202305014U (en) | 2012-07-04 |
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| CN2011202589489U Expired - Fee Related CN202305014U (en) | 2011-07-21 | 2011-07-21 | Low temperature infrared interferometer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852248A (en) * | 2014-01-17 | 2014-06-11 | 中国科学院上海技术物理研究所 | Method for measuring torsion rigidity of movable mirror supporting mechanism in plane mirror interferometer |
| WO2014166015A1 (en) * | 2013-04-08 | 2014-10-16 | 宁波源禄光电有限公司 | Small temperature-stabilized spectrograph |
-
2011
- 2011-07-21 CN CN2011202589489U patent/CN202305014U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014166015A1 (en) * | 2013-04-08 | 2014-10-16 | 宁波源禄光电有限公司 | Small temperature-stabilized spectrograph |
| CN103852248A (en) * | 2014-01-17 | 2014-06-11 | 中国科学院上海技术物理研究所 | Method for measuring torsion rigidity of movable mirror supporting mechanism in plane mirror interferometer |
| CN103852248B (en) * | 2014-01-17 | 2016-08-17 | 中国科学院上海技术物理研究所 | The measuring method of index glass supporting mechanism torsional rigidity in plane mirror interferometer |
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Granted publication date: 20120704 Termination date: 20140721 |
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