CN111189546A - Coupling structure of infrared Dewar component window and low-temperature optical system and implementation method - Google Patents
Coupling structure of infrared Dewar component window and low-temperature optical system and implementation method Download PDFInfo
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- CN111189546A CN111189546A CN202010126497.7A CN202010126497A CN111189546A CN 111189546 A CN111189546 A CN 111189546A CN 202010126497 A CN202010126497 A CN 202010126497A CN 111189546 A CN111189546 A CN 111189546A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 106
- 230000008878 coupling Effects 0.000 title claims abstract description 44
- 238000010168 coupling process Methods 0.000 title claims abstract description 44
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009434 installation Methods 0.000 claims abstract description 21
- 238000009413 insulation Methods 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims description 85
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 7
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 229910000833 kovar Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 238000010894 electron beam technology Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052738 indium Inorganic materials 0.000 claims description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000005083 Zinc sulfide Substances 0.000 claims description 2
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 229910052594 sapphire Inorganic materials 0.000 claims description 2
- 239000010980 sapphire Substances 0.000 claims description 2
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 2
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 2
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 230000005855 radiation Effects 0.000 abstract description 7
- 230000002269 spontaneous effect Effects 0.000 abstract description 5
- 238000005057 refrigeration Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/0205—Mechanical elements; Supports for optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention discloses a coupling structure of an infrared Dewar component window and a low-temperature optical system and an implementation method. The coupling structure of the infrared Dewar component window and the low-temperature optical system comprises a window cap inner container, a heat insulation corrugated pipe, a window mounting plate, an infrared window, a low-temperature optical system mounting frame and a heat coupling layer. The invention introduces a method for realizing a low-temperature window of an infrared Dewar component into a low-temperature optical system of an infrared remote sensing instrument, in the method, the coupling of the Dewar window and the low-temperature optical system is realized through a novel coupling structure, the refrigeration and the temperature reduction are carried out on the Dewar window by utilizing the cold energy of the low-temperature optical system, and finally the purpose of reducing the influence of the spontaneous radiation of the window on the background noise of the system is realized. Meanwhile, the flexible heat insulation corrugated pipe structure added in the structure can effectively inhibit the conduction of cold energy of the low-temperature optical system to the Dewar direction and avoid the problem of installation over-positioning between the optical registration installation of the Dewar component and the thermal coupling installation of the window.
Description
Technical Field
The invention relates to an infrared detector Dewar component technology and a low-temperature optical technology, in particular to a coupling structure of an infrared Dewar component window and a low-temperature optical system for reducing background radiation of a detector and an implementation method.
Background
The refrigeration type infrared detector assembly is widely applied to the field of aerospace infrared, and the detection performance of the infrared sensor is an important technical index of the high-spatial-resolution infrared remote sensing instrument. With the wavelength expansion to long wave and the improvement of detection sensitivity, the infrared detector must work at a deep low temperature. In order to realize the detection of longer wave bands and weaker signals, an infrared remote sensing instrument generally needs to reduce the background noise of a system by reducing the characteristic level of the infrared radiation of the infrared remote sensing instrument, so that the signal-to-noise ratio of the instrument is improved, and the detection performance of the external remote sensing instrument is finally improved. In the development of infrared remote sensing instruments, particularly in the design of long-wave and very-long-wave infrared remote sensing instruments, because the infrared radiation characteristic signal of a detected target is weak, the background noise of the target is generally reduced by a low-temperature optical system, so that the weak infrared signal is detected. The spontaneous radiation of the object temperature is suppressed by refrigerating and cooling all parts in the optical system of the remote sensing instrument, so that the system has low background noise.
The dewar is used as a packaging form of the infrared detector, and the dewar provides mechanical protection and vacuum environment for the detector while providing optical, mechanical, electrical, thermal and other interfaces for the detector. In order to ensure the structural strength of the dewar, the dewar is generally made of metal materials. The infrared window of the dewar is hermetically welded on the dewar shell, and the working temperature of the infrared window is generally normal temperature or near room temperature. When the dewar assembly encapsulating the infrared detector is installed into the cryogenic optical system, the spontaneous emission of the room temperature operating dewar window will have an adverse effect on the cryogenic optical system background noise. In a low-temperature optical system, the influence of the spontaneous radiation of the optical window on the Dewar on the background noise of the infrared remote sensing instrument can be solved by a method of keeping the temperature of the Dewar optical window consistent with the working temperature of the low-temperature optical system. The most effective method is to thermally couple the Dewar window part with the cold optical system, and cool the window by the cold optical system to make the temperature of the window consistent with that of the cold optical system.
Two main problems exist in the refrigeration and cooling of a Dewar window by a low-temperature optical system of an infrared remote sensing instrument. The first problem is the influence of the dewar after the dewar window is thermally coupled with the low temperature optical system on the cooling of the low temperature optical system: the direct refrigeration and temperature reduction of the Dewar window through the low-temperature optical system can lead the cold quantity of the low-temperature optical system to be inevitably conducted to the room temperature Dewar direction through the metal shell of the Dewar. Because the Dewar shell is made of metal materials, the heat conduction resistance is small, the cold energy of the cold optical system is conducted to the Dewar, the cold energy is lost, the low-temperature optical system cannot be cooled normally, and the cold optical system cannot reach the expected working temperature. Therefore, it is required to suppress the loss of the cooling energy from the low-temperature optical system to the dewar as much as possible. The second problem is the over-positioning problem of the registration installation of the Dewar inner detector and the optical system and the thermal coupling installation of the Dewar window and the cold optical system: in the process of installing the Dewar and the cryogenic optical system, the Dewar component firstly needs to complete the optical registration installation operation with the optical path of the system, and the position relation between the Dewar and the optical path after the operation is completed does not change. If the window and the cold optical system are thermally coupled and mounted on the Dewar, the Dewar shell with the rigid structure inevitably has over-positioning influence on the optical registration mounting during the thermal coupling and mounting. In summary, in order to reduce the influence of the dewar window spontaneous radiation of the infrared detector in the low-temperature optical system on the background noise of the infrared remote sensing instrument, a coupling structure of the infrared dewar assembly window and the low-temperature optical system and an implementation method thereof are urgently needed.
Disclosure of Invention
The invention aims to provide a coupling structure of an infrared dewar assembly window and a low-temperature optical system and an implementation method thereof.
The structure of the invention is shown in figure 1, which comprises: the window cap comprises a window cap inner container 1, a heat insulation corrugated pipe 2, a window mounting plate 3, an infrared window 4, a low-temperature optical system mounting frame 5 and a heat coupling layer 6.
The coupling structure of the infrared Dewar component window and the low-temperature optical system is shown in figure 1, a heat insulation corrugated pipe 2 is arranged outside a window cap liner 1, a corrugated pipe welding edge 2-2 at one end of the heat insulation corrugated pipe 2 is connected with a liner corrugated pipe welding edge 1-2 in a welding mode, and a corrugated pipe welding edge 2-2 at the other end of the heat insulation corrugated pipe is connected with a mounting plate welding edge 3-3 in a welding mode; the infrared window 4 is welded in a window mounting step 3-2 of the window mounting plate 3; the thermal coupling layer 6 is arranged between the window mounting plate 3 and the low-temperature optical system mounting frame 5.
The window cap liner 1 is made of kovar, titanium alloy and stainless steel metal, is cylindrical and is prepared in a machining mode, the bottom of the window cap liner is a liner Dewar welding edge 1-1, the diameter of the liner Dewar welding edge is consistent with that of an adaptive Dewar, the size of a liner corrugated pipe welding edge 1-2 above the liner Dewar welding edge 1-1 is consistent with that of a corrugated pipe connecting edge 2-2, and the top of the window cap liner is a liner supporting surface 1-3.
As shown in fig. 2, the heat insulation corrugated pipe 2 is made of stainless steel or titanium alloy with poor heat conductivity, and is cylindrical, the heat insulation corrugated pipe 2 is in clearance fit with the liner supporting surface 1-3, and the two ends of the heat insulation corrugated pipe are corrugated pipe welding edges 2-2.
The window mounting plate 3 is made of kovar, stainless steel or titanium alloy metal materials, the size of a mounting plate welding edge 3-3 on the outer side of the bottom surface of the window mounting plate is consistent with that of a corrugated pipe connecting edge 2-2, a window mounting step 3-2 is arranged in the center of the front surface of the window mounting plate, and mounting plate mounting holes 3-1 are circumferentially arranged.
The infrared window 4 is made of zinc sulfide, germanium or sapphire infrared light-transmitting material.
The low-temperature optical system mounting frame 5 is made of aluminum alloy or copper high-heat-conductivity metal materials and is of a plate-shaped structure, mounting frame screw holes 5-1 are formed in the periphery of the low-temperature optical system mounting frame 5, a mounting frame light through hole 5-2 is formed in the middle of the low-temperature optical system mounting frame 5, and a low-temperature optical mounting surface 5-3 is arranged on the bottom surface of the low-temperature optical system mounting frame and is matched with.
The material of the thermal coupling layer 6 is a high-thermal-conductivity soft metal sheet such as indium, aluminum and copper.
The realization method of the coupling structure of the infrared Dewar component window and the low-temperature optical system comprises the following steps:
1. the infrared window 4 is arranged in the mounting step 3-2 of the cover plate window, and airtight mounting is realized through a glue joint or filler welding mode.
2. And (3) performing airtight welding on the corrugated pipe welding edge 2-2 and the liner corrugated pipe welding edge 1-2 by using welding modes such as laser welding, argon arc welding, electron beam welding and the like.
3. And (3) carrying out airtight welding on the welding edge 3-3 of the mounting plate and the welding edge 2-2 of the corrugated pipe at the other end by using welding modes such as laser welding, argon arc welding, electron beam welding and the like.
4. And (3) welding the welding edge 1-1 of the inner container Dewar with the Dewar in an airtight manner by using welding modes such as laser welding, argon arc welding and the like, and finishing the preparation of the Dewar component. During the dewar vacuum pumping process, the window mounting plate 3 is pressed on the liner supporting surface 1-3 by the atmospheric pressure.
5. The low-temperature optical mounting surface 5-3 of the low-temperature optical system mounting frame 5 and the low-temperature optical system can be fixed with the low-temperature optical system in an integrated processing, welding and screw mounting mode. After the infrared detector dewar and the whole machine complete the optical registration operation, the clearance fit between the low-temperature optical system mounting frame 5 and the window mounting plate 3 is ensured.
6. The thermal coupling layer 6 is clamped between the low-temperature optical system mounting frame 5 and the window mounting plate 3, the thermal coupling layer 6 is required not to shield a system light path when the clamping is noticed, the mounting plate mounting hole 3-1 and the low-temperature optical system mounting frame 5-1 are aligned and fixed through a screw, and finally the window mounting plate 3 is clamped with the thermal coupling layer 6 and is installed on the low-temperature optical system mounting frame 5 in an extruding mode. The liner supporting surface 1-3 in the dewar is not in mechanical contact with the window mounting plate 3 after the thermal coupling installation.
The invention has the advantages that:
1. the invention has reliable structure and convenient operation;
2. the invention can effectively inhibit the conduction of cold energy of the low-temperature optical system to the Dewar;
3. the invention can effectively solve the problems of installation over-positioning of optical registration installation and thermal coupling installation.
Drawings
FIG. 1 is a schematic view of a low heat leakage mounting structure for a low temperature optical Dewar window;
in the figure:
1-inner container of window cap;
2-heat insulation corrugated pipe;
3-window mounting plate;
4-infrared window;
5-a low temperature optical system mounting rack;
5-1-mounting rack screw hole;
5-2-a mounting rack light through hole;
5-3-low temperature optical mounting surface;
6-thermal coupling layer;
FIG. 2 is a schematic view of the structure of the inner container of the window cap;
in the figure:
1-welding the edge of the liner dewar;
1-2-welding edges of the liner corrugated pipe;
1-3-liner supporting surface;
FIG. 3 is a schematic view of an insulating bellows;
in the figure:
2-bellows welding edge;
2-1-bellows;
FIG. 4 is a schematic view of a window mounting plate;
in the figure:
3-1-mounting plate mounting holes;
3-2, mounting a step on the window;
3-installing the welding edge of the plate;
3-4-liner guide step;
Detailed Description
The following detailed description will be made with reference to the accompanying drawings, wherein a schematic diagram of a coupling structure between a window of an infrared dewar assembly and a cryogenic optical system in the present invention is shown in fig. 1, an infrared long-wave detector is sealed in the dewar, and the detector operating temperature is 60K, the dewar shell temperature is 280K, and the cryogenic optical system operating temperature is 150K, and the specific implementation method of the present invention is as follows:
the window cap liner 1 is made of kovar and is cylindrical, and is prepared in a machining mode, the wall thickness of the cylinder is 1mm, the diameter of a Dewar welding edge 1-1 of the bottom liner is 40mm, the diameter of a liner corrugated pipe welding edge 1-2 is 54mm, the outer diameter of a liner supporting surface 1-3 is 38mm, and the length from the liner corrugated pipe welding edge 1-2 to the liner supporting surface 1-3 is 40 mm.
The heat insulation corrugated pipe 2 is made of stainless steel, is cylindrical, has the wall thickness of 0.1mm, and has the inner diameter of 41mm, the diameter of the two end faces of the heat insulation corrugated pipe 2, namely the corrugated pipe welding edges 2-2, of 54mm and the length of the corrugated pipe of 42 mm.
The window mounting plate 3 material be kovar, thickness 5mm, mounting panel welding limit 3-3 diameter be 54mm, window installation step 3-2 diameter 33mm, dark 3.5mm, mounting panel mounting hole 3-1 has been arranged around the window mounting plate 3, the aperture is 4.5mm, and quantity is 6, 6 hole evenly distributed are on the circle of diameter 60 mm.
The infrared window 4 is made of germanium, has the diameter of 32mm and the thickness of 3mm, and meets the requirement of infrared long-wave optical light transmission.
The low-temperature optical system mounting rack 5 is made of aluminum alloy, threaded holes of the mounting rack threaded holes 5-1 are M4, the number of the threaded holes is 6, the 6 threaded holes are uniformly distributed on a circle with the diameter of 60mm, the diameter of the mounting rack light through hole 5-2 in the middle of the low-temperature optical system mounting rack 5 is 35mm, and the low-temperature optical mounting surface 5-3 is provided with 2 through holes with the diameter of 4.5 mm.
The thermal coupling layer 6 is made of indium sheet with the thickness of 0.2 mm.
The implementation process of the implementation method of the low-temperature window of the infrared Dewar component comprises the following steps:
1. and installing the infrared window 4 into the cover plate window installation step 3-2, and carrying out airtight welding in a low-temperature brazing mode.
2. The corrugated pipe 2 is nested and installed on the window cap liner 1, and the corrugated pipe welding edge 2-2 and the liner corrugated pipe welding edge 1-2 are subjected to airtight welding by laser welding.
3. And carrying out airtight welding on the corrugated pipe welding edge 2-2 at the other end and the mounting plate welding edge 3-3 of the window mounting plate 3 by using laser welding.
4. Carrying out airtight welding on the liner dewar welding edge 1-1 and a dewar by using laser welding, and finishing the preparation of the infrared dewar assembly; in the process of vacuumizing in Dewar preparation, the window mounting plate 3 is pressed on the liner supporting surface 1-3 by atmospheric pressure, the window cap liner 1 realizes supporting and fixing of the window mounting plate 3,
5. and (3) carrying out optical registration installation on the infrared detector Dewar and the low-temperature optical system, and then installing and fixing a low-temperature optical installation surface 5-3 of the low-temperature optical system installation rack 5 and the low-temperature optical system through screws, wherein after the installation is finished, the gap between the low-temperature optical system installation rack 5 and the window installation board 3 is 1.2 mm.
6. A thermal coupling layer 6 with the thickness of 0.2mm is padded between the low-temperature optical system mounting frame 5 and the window mounting plate 3, when the thermal coupling layer 6 is noticed to be padded, a system light path cannot be shielded, and the window mounting plate 3 is padded with the thermal coupling layer 6 in a clamping manner and is mounted on the low-temperature optical system mounting frame 5 in a squeezing manner through screws; after the thermal coupling installation, the liner supporting surface 1-3 in the Dewar forms a distance of about 1mm with the window mounting plate 3, and the liner supporting surface 1-3 is not in mechanical contact with the window mounting plate 3.
Claims (8)
1. The utility model provides an infrared dewar subassembly window and low temperature optical system's coupled structure, includes window cap inner bag (1), thermal-insulated bellows (2), window mounting panel (3), infrared window (4), low temperature optical system mounting bracket (5), thermal coupling layer (6), its characterized in that:
the outer part of the inner container (1) of the window cap is provided with a heat insulation corrugated pipe (2), the heat insulation corrugated pipe (2) is in clearance fit with the inner container supporting surface (1-3), a corrugated pipe welding edge (2-2) at one end of the window cap is connected with the inner container corrugated pipe welding edge (1-2) in a welding way, and a corrugated pipe welding edge (2-2) at the other end of the window cap is connected with an installation plate welding edge (3-3) in a welding way; the infrared window (4) is welded in a window mounting step (3-2) of the window mounting plate (3); and a heat coupling layer (6) is arranged between the window mounting plate (3) and the low-temperature optical system mounting rack (5).
2. The structure of claim 1, wherein the infrared dewar assembly window and cryogenic optical system coupling structure comprises: the window cap liner (1) is made of kovar, titanium alloy and stainless steel, is cylindrical, and has a liner dewar welding edge (1-1) at the bottom, the diameter of the liner dewar welding edge is consistent with that of an adaptive dewar, a liner corrugated pipe welding edge (1-2) above the liner dewar welding edge (1-1) has the size consistent with that of the corrugated pipe connecting edge (2-2), and a liner supporting surface (1-3) at the top.
3. The structure of claim 1, wherein the infrared dewar assembly window and cryogenic optical system coupling structure comprises: the heat insulation corrugated pipe (2) is made of stainless steel or titanium alloy, is cylindrical, and is provided with corrugated pipe welding edges (2-2) at two ends.
4. The structure of claim 1, wherein the infrared dewar assembly window and cryogenic optical system coupling structure comprises: the window mounting plate (3) is made of Kovar, stainless steel or titanium alloy, the size of a mounting plate welding edge (3-3) on the outer side of the bottom surface of the window mounting plate is consistent with that of a corrugated pipe connecting edge (2-2), a window mounting step (3-2) is arranged in the center of the front surface of the window mounting plate, and mounting plate mounting holes (3-1) are circumferentially arranged.
5. The structure of claim 1, wherein the infrared dewar assembly window and cryogenic optical system coupling structure comprises: the infrared window (4) is made of zinc sulfide, germanium or sapphire infrared light-transmitting material.
6. The structure of claim 1, wherein the infrared dewar assembly window and cryogenic optical system coupling structure comprises: the low-temperature optical system mounting rack (5) is made of aluminum alloy or copper and is of a plate-shaped structure, mounting rack screw holes (5-1) are formed in the periphery of the low-temperature optical system mounting rack (5), a mounting rack light through hole (5-2) is formed in the middle of the low-temperature optical system mounting rack (5), and the bottom surface of the low-temperature optical system mounting rack is a low-temperature optical mounting surface (5-3) and the mounting structure of the low-.
7. The structure of claim 1, wherein the infrared dewar assembly window and cryogenic optical system coupling structure comprises: the material of the thermal coupling layer (6) is indium, aluminum or copper metal sheet.
8. A method of implementing the infrared dewar assembly window and cryogenic optical system coupling structure of claim 1, characterized by the method steps of:
1) the infrared window (4) is arranged in the cover plate window mounting step (3-2), and airtight mounting is realized in a gluing or filler welding mode;
2) the bellows welding edge (2-2) and the liner bellows welding edge (1-2) are hermetically welded by using welding modes such as laser welding, argon arc welding, electron beam welding and the like;
3) the mounting plate welding edge (3-3) and the corrugated pipe welding edge (2-2) at the other end are subjected to airtight welding by using welding modes such as laser welding, argon arc welding, electron beam welding and the like;
4) the liner Dewar welding edge (1-1) is hermetically welded with the Dewar by using welding modes such as laser welding, argon arc welding and the like, and the preparation of the Dewar component is finished; in the process of Dewar vacuum pumping, the window mounting plate 3 is pressed on the liner supporting surface (1-3) by atmospheric pressure due to the action of atmospheric pressure;
5) the low-temperature optical mounting surface (5-3) of the low-temperature optical system mounting frame (5) and the low-temperature optical system can be fixed with the low-temperature optical system in an integrated processing, welding and screw mounting mode; after the infrared detector Dewar and the whole machine complete optical registration operation, clearance fit between the low-temperature optical system mounting rack (5) and the window mounting board (3) is ensured;
6) a thermal coupling layer (6) is clamped between the low-temperature optical system mounting frame (5) and the window mounting plate (3), when the thermal coupling layer (6) is noticed to clamp the pad, the system optical path cannot be shielded, the mounting plate mounting hole (3-1) and the low-temperature optical system mounting frame (5-1) are aligned and fixed through a screw, and finally the window mounting plate (3) is clamped with the thermal coupling layer (6) and is installed on the low-temperature optical system mounting frame (5) in an extruding mode; the liner supporting surface (1-3) in the Dewar has no mechanical contact with the window mounting plate (3) after thermal coupling installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010126497.7A CN111189546A (en) | 2020-02-28 | 2020-02-28 | Coupling structure of infrared Dewar component window and low-temperature optical system and implementation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010126497.7A CN111189546A (en) | 2020-02-28 | 2020-02-28 | Coupling structure of infrared Dewar component window and low-temperature optical system and implementation method |
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| CN111189546A true CN111189546A (en) | 2020-05-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735763A (en) * | 2020-06-19 | 2020-10-02 | 中国科学院西安光学精密机械研究所 | Cold optical system of long-wave infrared Doppler difference interferometer |
| CN114518680A (en) * | 2022-01-28 | 2022-05-20 | 中国科学院高能物理研究所 | FXT focusing camera refrigeration link structure for Einstein probe satellite |
-
2020
- 2020-02-28 CN CN202010126497.7A patent/CN111189546A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735763A (en) * | 2020-06-19 | 2020-10-02 | 中国科学院西安光学精密机械研究所 | Cold optical system of long-wave infrared Doppler difference interferometer |
| CN114518680A (en) * | 2022-01-28 | 2022-05-20 | 中国科学院高能物理研究所 | FXT focusing camera refrigeration link structure for Einstein probe satellite |
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