CN102288293A - Low-temperature interferometer - Google Patents
Low-temperature interferometer Download PDFInfo
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- CN102288293A CN102288293A CN2011102048177A CN201110204817A CN102288293A CN 102288293 A CN102288293 A CN 102288293A CN 2011102048177 A CN2011102048177 A CN 2011102048177A CN 201110204817 A CN201110204817 A CN 201110204817A CN 102288293 A CN102288293 A CN 102288293A
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Abstract
The invention discloses a low-temperature interferometer, which comprises a movable mirror module, a fixed mirror module, a beam splitter module, an interferometer frame, a heat transferring plate, a heat-insulating supporting barrel, an optical path difference measuring system taking a frequency stabilized laser as a representative, a movable mirror locking device taking a pneumatic component and an air storing barrel as representatives, an interferometer mounting baseplate and the like. The interferometer can work at a low temperature of 200 K.
Description
Technical field
The present invention relates to space photoelectricity technical device, specifically refer to a kind of low temperature interferometer, it is applied to working temperature at the space of 200-205K infrared Fourier conversion spectrum detection instrument, and this instrument is used for the satellite atmosphere remote sensing.
Background technology
For satellite atmosphere remote sensing instrument, 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 CrIS of Ou Zhou the IASI and the U.S. has 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 as 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 signal is weak many.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 instrument the most approaching with the present invention 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 the present invention has designed the low temperature interferometer, has used low temperature structure and has added and carried out horizontal glass angle re-graduation module under the low temperature.This low temperature interferometer is suitable for low light level spectrum signal and measures.
Summary of the invention
The purpose of this invention is to provide a kind of space low temperature interferometer, 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 instrument in the future.
Technical scheme of the present invention is as follows:
The low temperature interferometer scheme as shown in Figure 1, 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.The index glass module is made 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 of frequency stabilized laser 9, laser detector 1 and wave plate and some catoptrons.The index glass locking system is made 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 low temperature interferometer of the present invention 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 that it is supported.Another part is the optical path difference tolerance part and the pneumatic Lock Part 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.By 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 to have designed bidimensional angular adjustment system in the horizontal glass module, temperature cool down stable after, start the bidimensional regulating system, the light beam regulation that two bundles are participated in interfering are 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 do 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.
Advantage of the present invention 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
Structure example of the present invention 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 by heat transfer plate 3 through the cold link oral instructions, passes to space radiant cooler from cold chain by Cryo Heat Tube again.
Claims (1)
1. low temperature 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), frequency stabilized laser (9), laser detector (1) and comprise pneumatic element (8) and the index glass locking device of air drum (10) and interferometer installation base plate (11) is characterized in that:
Described index glass module (7) is made 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 of frequency stabilized laser (9), laser detector (1) and wave plate and some catoptrons;
Described index glass locking device is made of pneumatic element, air drum, solenoid valve, pressure transducer and some pipelines and joint;
Be divided into the two large divisions on the described 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 coupled by cold chain interface (12), another part is the part of heat insulation support tube (2) below, and it is the normal temperature part; Cold light is learned member supports according temperature compensation principle design, avoids the variation of optical element from normal temperature to low temperature to cause face shape to change; Because physical construction can not guarantee that from normal temperature to low temperature the depth of parallelism of two interfering beams remains unchanged, added the bidimensional angle adjusting mechanism in the interferometer of the present invention, after temperature reduces, start 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, by the different materials combination, makes the pretightning force between the parallel moving mechanism part insensitive to temperature variation; The laser instrument of optical path difference metric module and laser detector are installed on the normal temperature substrate (11), guarantee their normal temperature working environment; The pneumatic element of locking module (8) is at low-temperature space, and remainder has guaranteed the operate as normal of solenoid valve in the normal temperature district; Pneumatic element (8) is made with the nonmetallic materials that are beneficial to cold and hot zone isolation with the tracheae that is connected between the gas-holder (10).
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| CN 201110204817 CN102288293B (en) | 2011-07-21 | 2011-07-21 | Low-temperature interferometer |
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| CN 201110204817 CN102288293B (en) | 2011-07-21 | 2011-07-21 | Low-temperature interferometer |
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| CN102288293A true CN102288293A (en) | 2011-12-21 |
| CN102288293B CN102288293B (en) | 2013-10-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092724A (en) * | 2016-08-04 | 2016-11-09 | 清华大学 | There is the concrete temperature stress testing machine of temperature deformation self-compensating function |
| CN109489820A (en) * | 2018-11-21 | 2019-03-19 | 中国科学院上海技术物理研究所 | A kind of adjustable field stop of imaging type infrared Fourier transform spectrum detection instrument low temperature |
| US11828689B2 (en) | 2020-10-29 | 2023-11-28 | Hand Held Products, Inc. | Apparatuses, systems, and methods for sample capture and extraction |
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| SU794340A1 (en) * | 1979-02-09 | 1981-01-07 | Предприятие П/Я М-5727 | Cryogenic system |
| CN2235117Y (en) * | 1995-04-05 | 1996-09-11 | 严家彪 | Combined Michelson interferometer |
| CN2266140Y (en) * | 1996-10-23 | 1997-10-29 | 中国科学院光电技术研究所 | Low-temp. infrared optical system |
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2011
- 2011-07-21 CN CN 201110204817 patent/CN102288293B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU794340A1 (en) * | 1979-02-09 | 1981-01-07 | Предприятие П/Я М-5727 | Cryogenic system |
| CN2235117Y (en) * | 1995-04-05 | 1996-09-11 | 严家彪 | Combined Michelson interferometer |
| CN2266140Y (en) * | 1996-10-23 | 1997-10-29 | 中国科学院光电技术研究所 | Low-temp. infrared optical system |
Non-Patent Citations (2)
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| 任栖锋等: "低温光学系统两级温区的设计与分析", 《红外与激光工程》 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092724A (en) * | 2016-08-04 | 2016-11-09 | 清华大学 | There is the concrete temperature stress testing machine of temperature deformation self-compensating function |
| CN106092724B (en) * | 2016-08-04 | 2019-01-22 | 清华大学 | Concrete temperature stress testing machine with temperature deformation self-compensating function |
| CN109489820A (en) * | 2018-11-21 | 2019-03-19 | 中国科学院上海技术物理研究所 | A kind of adjustable field stop of imaging type infrared Fourier transform spectrum detection instrument low temperature |
| US11828689B2 (en) | 2020-10-29 | 2023-11-28 | Hand Held Products, Inc. | Apparatuses, systems, and methods for sample capture and extraction |
| US11846574B2 (en) | 2020-10-29 | 2023-12-19 | Hand Held Products, Inc. | Apparatuses, systems, and methods for sample capture and extraction |
| US11852567B2 (en) | 2020-10-29 | 2023-12-26 | Hand Held Products, Inc. | Apparatuses, systems, and methods for sample capture and extraction |
| US11852568B2 (en) | 2020-10-29 | 2023-12-26 | Hand Held Products, Inc. | Apparatuses, systems, and methods for sample capture and extraction |
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| Publication number | Publication date |
|---|---|
| CN102288293B (en) | 2013-10-23 |
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