CN117111253A - Refrigerating device for low-temperature optical element and low-temperature optical system - Google Patents
Refrigerating device for low-temperature optical element and low-temperature optical system Download PDFInfo
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- CN117111253A CN117111253A CN202210529870.2A CN202210529870A CN117111253A CN 117111253 A CN117111253 A CN 117111253A CN 202210529870 A CN202210529870 A CN 202210529870A CN 117111253 A CN117111253 A CN 117111253A
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- optical element
- low
- temperature
- cryogenic
- temperature optical
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- 230000003287 optical effect Effects 0.000 title claims abstract description 212
- 238000009413 insulation Methods 0.000 claims abstract description 28
- 238000005057 refrigeration Methods 0.000 claims abstract description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 78
- 239000007788 liquid Substances 0.000 claims description 41
- 229910052757 nitrogen Inorganic materials 0.000 claims description 39
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 8
- 238000003384 imaging method Methods 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 229910000833 kovar Inorganic materials 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- CFOAUMXQOCBWNJ-UHFFFAOYSA-N [B].[Si] Chemical compound [B].[Si] CFOAUMXQOCBWNJ-UHFFFAOYSA-N 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002470 thermal conductor Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to the technical field of low-temperature refrigeration, and provides a refrigeration device and a low-temperature optical system for a low-temperature optical element, wherein the refrigeration device for the low-temperature optical element comprises a low-temperature cold source for providing low temperature for the low-temperature optical element; one end of the flexible heat conduction belt is connected with the low-temperature cold source, and the other end of the flexible heat conduction belt is connected with the low-temperature optical element; a heat insulating support, one side of which is used for setting a low-temperature optical element; the optical lens mounting seat is arranged on the other side of the heat insulation support, and a room temperature optical window is arranged on the optical lens mounting seat. According to the refrigerating device for the low-temperature optical element and the low-temperature optical system, the cold energy of the low-temperature cold source is conducted to the low-temperature optical element through the flexible heat conduction belt; by arranging the low-temperature optical element on one side of the heat insulation support and arranging the room-temperature optical window on the other side of the heat insulation support, efficient heat insulation of the low-temperature optical element and the room-temperature optical window in a limited space can be realized, and corresponding optical adjustment can be realized.
Description
Technical Field
The invention relates to the technical field of low-temperature refrigeration, in particular to a refrigeration device for a low-temperature optical element and a low-temperature optical system.
Background
The low-temperature optical system is generally suitable for a high-sensitivity infrared detection system, and the principle is that the noise of the whole detection system is reduced by reducing the self temperature of the optical system and reducing the self heat radiation, so that the signal-to-noise ratio is improved, and the effect of high-sensitivity detection is achieved.
The infrared detection system based on the low-temperature optical system has high detection sensitivity, is an ideal means for weak target infrared detection, but the low-temperature optical system is difficult to adjust, and limits the application of the low-temperature optical system. The main reason is that the low-temperature optical element can realize the detection of the target only through the normal-temperature optical window, and in order to improve the compactness of the infrared detection system, the normal-temperature optical window is generally made into a lens, the lens has certain focal power, and the normal-temperature optical window and the low-temperature optical element are required to be installed on the same reference platform.
However, the normal temperature optical window in the prior art can increase the thermal load of the low temperature optical element, so that larger refrigerating capacity is required, and the power consumption of the whole system is increased; meanwhile, the cooling capacity of the low-temperature optical element is conducted to the lens of the normal-temperature optical window to cool the lens, and after the temperature is lower than the ambient dew point temperature, the outer surface of the lens is subjected to water vapor condensation to influence the optical performance of the system.
Disclosure of Invention
The invention provides a refrigerating device for a low-temperature optical element and a low-temperature optical system, which are used for solving the defects of low-temperature refrigeration and optical adjustment of a transmission type low-temperature optical system under the condition of space constraint in the prior art, and realizing high-efficiency refrigeration while meeting the optical adjustment requirement.
The invention provides a refrigerating device for a low-temperature optical element, which is used for refrigerating the low-temperature optical element and comprises the following components: a low-temperature cold source for providing a low temperature to the low-temperature optical element;
one end of the flexible heat conduction belt is connected with the low-temperature cold source, and the other end of the flexible heat conduction belt is connected with the low-temperature optical element;
a heat insulating support having one side for disposing the cryogenic optical element;
the optical lens mounting seat is arranged on the other side of the heat insulation support, and a room-temperature optical window is arranged on the optical lens mounting seat.
According to the refrigerating device for the low-temperature optical element, the heat insulation support is of a multi-ring hollow structure and at least comprises a first ring body, wherein the inner side of the first ring body is used for arranging the low-temperature optical element, and the outer side of the first ring body is provided with the optical lens mounting seat.
According to the refrigerating device for the low-temperature optical element, the heat insulation support is in a hollowed-out structure, the refrigerating device further comprises a second annular body and a third annular body, and the first annular body, the second annular body and the third annular body are arranged along the axial direction of the refrigerating device; and the second annular body is connected with the first annular body and the second annular body is connected with the third annular body through connecting rods.
The refrigeration device for the low-temperature optical element further comprises a lens barrel, wherein the lens barrel is used for bearing the low-temperature optical element, and the lens barrel is arranged on the inner side of the heat insulation support.
According to the refrigerating device for the low-temperature optical element, the low-temperature cold source adopts low-temperature liquid nitrogen and comprises the following components:
a liquid nitrogen dewar;
the liquid nitrogen storage tank is arranged in the liquid nitrogen Dewar tank, and the bottom of the liquid nitrogen storage tank is provided with a guide pillar used for being connected with the flexible heat conduction belt;
and one end of the neck pipe is connected with the top of the liquid nitrogen Dewar tank, and the other end of the neck pipe is connected with the liquid nitrogen storage tank.
According to the present invention, there is provided a refrigerating apparatus for a cryogenic optical element, the liquid nitrogen dewar comprising:
the liquid nitrogen storage tank is arranged in the upper shell, and a mounting hole is formed in the side wall of the upper shell;
the cover plate is arranged at the mounting hole and hinged with the upper shell;
the lower shell is arranged at the bottom of the upper shell, one side of the lower shell is embedded with the optical lens mounting seat, and the inside of the lower shell is provided with the heat insulation support and the optical lens mounting seat.
According to the refrigerating device for the low-temperature optical element, a rear window is arranged on the side, opposite to the optical lens mounting seat, of the lower shell.
According to the refrigerating device for the low-temperature optical element, the flexible heat conduction belt is made of oxygen-free copper or red copper.
According to the refrigerating device for the low-temperature optical element, the material of the heat insulation support is 4J29, stainless steel 316 or titanium alloy.
The present invention also provides a low-temperature optical system including: a cryogenic optical element and a refrigeration device for a cryogenic optical element as described above, the cryogenic optical element being disposed inside the thermally insulating support.
The refrigerating device for the low-temperature optical element is characterized in that one end of a flexible heat conduction belt is connected with a low-temperature cold source, and the other end of the flexible heat conduction belt is connected with the low-temperature optical element to conduct the cold of the low-temperature cold source to the low-temperature optical element; by arranging the low-temperature optical element on one side of the heat insulation support and arranging the room-temperature optical window on the other side of the heat insulation support, efficient heat insulation of the low-temperature optical element and the room-temperature optical window in a limited space can be realized, and corresponding optical adjustment can be realized.
The low-temperature optical system provided by the invention has various advantages as described above due to the inclusion of the refrigerating device for the low-temperature optical element as described above.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a refrigeration apparatus for a cryogenic optical element provided by the present invention;
FIG. 2 is a side view of the external structure of a refrigeration device for a cryogenic optical element provided by the present invention;
fig. 3 is a front view showing the external structure of a refrigerating apparatus for a cryogenic optical element provided by the present invention;
FIG. 4 is a schematic view of the structure of an insulating support provided by the present invention;
fig. 5 is a schematic diagram of a connection structure between a heat insulation support, a flexible heat conduction band and a lens barrel provided by the invention;
fig. 6 is a front view of the connection of the thermally insulating support, flexible thermally conductive strip and barrel provided by the present invention;
FIG. 7 is a side view of the connection of the thermally insulating support, flexible thermal conductor ribbon and barrel provided by the present invention;
FIG. 8 is a side view of the present invention with the lower housing removed;
FIG. 9 is a front view of the present invention with the lower housing removed;
reference numerals:
1. a low temperature optical element; 2. a low-temperature cold source; 3. a flexible heat conducting strip; 4. a thermally insulating support; 5. an optical lens mount; 6. room temperature optical window; 7. a lens barrel; 8. a rear window;
21. a liquid nitrogen dewar; 22. a liquid nitrogen storage tank; 23. a neck tube;
211. an upper housing; 212. a cover plate; 213. a lower housing;
41. a first annular body; 42. a second annular body; 43. a third annular body; 44. and (5) a mounting ring.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The refrigerating apparatus for the low-temperature optical element 1 of the present invention is described below with reference to fig. 1 to 9.
As shown in fig. 1 to 3, the refrigeration device for the low-temperature optical element 1 provided by the invention is used for refrigerating the low-temperature optical element 1 and comprises a low-temperature cold source 2, a flexible heat conduction belt 3, a heat insulation support 4 and an optical lens mounting seat 5. The low-temperature cold source 2 is used for providing low-temperature cold for the low-temperature optical element 1; one end of the flexible heat conduction belt 3 is connected with the low-temperature cold source 2, and the other end is connected with the low-temperature optical element 1; one side of the heat insulating support 4 is used for arranging the low-temperature optical element 1; the optical lens mount 5 is disposed on the other side of the heat insulating support 4, and a room temperature optical window 6 is disposed on the optical lens mount 5.
The refrigerating device for the low-temperature optical element is characterized in that one end of a flexible heat conduction belt 3 is connected with a low-temperature cold source 2, and the other end of the flexible heat conduction belt is connected with a low-temperature optical element 1 to conduct the cold of the low-temperature cold source 2 to the low-temperature optical element 1; by arranging the cryogenic optical element 1 on one side of the thermally insulating support 4 and the room temperature optical window 6 on the other side of the thermally insulating support 4, i.e. the cryogenic optical element 1 and the optical lens mount 5 are not in direct contact, efficient thermal insulation of the cryogenic optical element 1 and the room temperature optical window 6 in a confined space and corresponding optical adjustment can be achieved.
In the embodiment of the present invention, as shown in fig. 4, the heat insulation support 4 is in a hollow annular structure, and at least comprises a first annular body 41, wherein the inner side of the first annular body 41 is used for setting the low-temperature optical element 1, and the outer side of the first annular body is provided with the optical lens mounting seat 5.
Still further, the heat insulation support 4 is configured as a multi-layer annular hollow structure, and further comprises a second annular body 42 and a third annular body 43, wherein the first annular body 41, the second annular body 42 and the third annular body 43 are arranged along the axial direction thereof, and the second annular body 42 and the first annular body 41 and the second annular body 42 and the third annular body 43 are all connected through connecting rods to form the hollow structure.
The heat insulation support 4 adopts a multi-layer annular hollowed-out structure, and aims to increase heat conduction resistance as much as possible in a limited space, and heat conduction path between low temperature and room temperature is increased, so that heat isolation between low temperature and room temperature is realized. The surface conduction is changed into linear conduction, and the heat conduction surface is arranged into an annular hollow structure, so that the heat transfer path is increased, and meanwhile, the heat conduction sectional area is correspondingly reduced. The provision of the thermally insulating support 4 greatly increases the heat transfer path and the heat transfer cross-sectional area is correspondingly reduced. The first annular body 41, the second annular body 42, and the third annular body 43 may be identical in structure or may be different in structure as long as they can achieve heat-insulating mounting of the low-temperature optical element 1 and the optical lens mount 5.
As shown in fig. 5, in order to facilitate the installation of the cryogenic optical element 1, a mounting ring 44 is provided in the inner ring of the annular body on the side of the insulating support 4 where the cryogenic optical element 1 is installed, and a threaded hole is provided in the mounting ring 44 to facilitate the connection with the cryogenic optical element 1.
As shown in fig. 6 and 7, in the embodiment of the present invention, a lens barrel 7 is further included, the lens barrel 7 is for carrying the cryogenic optical element 1, and the lens barrel 7 is disposed inside the heat insulating support 4. That is, the low-temperature optical element 1 is mounted on the lens barrel 7 in an optical adjustment method, then the lens barrel 7 is fixed in the heat insulating support 4, and then the heat insulating support 4 is mounted on the optical lens mount 5. The optical lens mount 5 has a mounting surface for the room temperature optical window 6. Because the room temperature optical window 6 is a lens, the lens has certain focal power and needs to be optically adjusted. The lens barrel 7, the low-temperature optical element 1, the heat insulation support 4 and the optical lens mounting seat 5 are placed on an optical center deviation measuring instrument, the position of the room-temperature optical window 6 is adjusted by taking the assembled lens barrel component optical element as a reference, the position relation between the room-temperature optical window 6 and the low-temperature optical element 1 meets the optical assembling and adjusting requirement, and the gap between the room-temperature optical window 1 and the optical lens mounting seat 5 is filled with an adhesive, so that the room-temperature optical window 6 and the low-temperature optical element 1 are mounted on the same mounting platform.
In the embodiment of the present invention, the cryogenic cold source 2 may be a cryogenic refrigerant, such as a cryogenic liquid including liquid nitrogen, liquid oxygen, liquid helium, and the like, and may also be a cryogenic refrigerator, such as a stirling refrigerator, a pulse tube refrigerator, a GM refrigerator, and the like. The Gifford-Mcmahon refrigerator is a regenerative small-sized low-temperature refrigerator, which obtains low temperature by utilizing the principle of adiabatic deflation expansion (also called Simon expansion), and the GM refrigerator consists of a low-temperature cold head (expander), a helium compressor and a metal hose. Of course, the low-temperature cold source can also adopt other forms to realize refrigeration, and is not limited to the above forms, so long as the low-temperature cold source capable of realizing refrigeration is within the protection scope of the invention.
Specifically, in one embodiment of the present invention, the cryogenic cold source 2 may use cryogenic liquid nitrogen, specifically including a liquid nitrogen dewar 21, a liquid nitrogen storage tank 22 and a neck pipe 23, where the liquid nitrogen storage tank 22 is disposed inside the liquid nitrogen dewar 21, and the bottom of the liquid nitrogen storage tank 22 has a guide pillar for connecting with the flexible heat conducting belt 3; one end of the neck pipe 23 is connected with the top of the liquid nitrogen Dewar 21, the other end is connected with the liquid nitrogen storage tank 22, and the neck pipe 23 is arranged to facilitate the addition of liquid nitrogen in the liquid nitrogen storage tank 22. The liquid nitrogen dewar 21 is used for protecting the liquid nitrogen storage tank 22.
Further, as shown in fig. 1, 2 and 3, the liquid nitrogen dewar 21 comprises an upper housing 211, a cover plate 212 and a lower housing 213, wherein a liquid nitrogen storage tank 22 is arranged in the upper housing 211, and a mounting hole is formed on the side wall of the upper housing 211; the cover plate 212 is arranged at the mounting hole and hinged with the upper housing 211; the cover plate is in sealing connection with the upper housing 211, the lower housing 213 is arranged at the bottom of the upper housing 211, an optical lens mounting seat 5 is embedded at one side of the lower housing 213, and a heat insulation support 4 and the optical lens mounting seat 5 are arranged in the lower housing 213. Further, the flexible heat conductive tape 3 penetrates the upper case 211 and the lower case 213, and has a top end connected to the heat conductive column and a bottom end connected to the low-temperature optical element 1.
Wherein the side of the lower housing 213 opposite to the optical lens mount 5 is provided with a rear window 8. The imaging focal plane of the cryogenic optical element 1 is located behind the rear window 8 and the imaging quality of the cryogenic optical element 1 can be tested by an imaging sensor.
In the embodiment of the invention, the flexible heat conducting belt 3 can be made of oxygen-free copper, red copper or other materials with good heat conducting performance. The flexible heat conduction belt 3 has certain flexibility and multidimensional freedom degree, and can adapt to the installation deviation between the low-temperature optical element 1 and the liquid nitrogen storage tank 22, so that the support of the low-temperature optical element 1 has higher precision.
In the embodiment of the present invention, the material of the heat insulating support 4 may be 4J29, stainless steel 316 or titanium alloy. Wherein the 4J29 alloy is also called Kovar (Kovar) alloy. The alloy has a linear expansion coefficient similar to that of silicon-boron hard glass at 20-450 ℃, a higher Curie point and good low-temperature tissue stability. Other materials may be used for the heat insulating support, and are not particularly limited herein.
The invention discloses a refrigerating device for a low-temperature optical element, which comprises the following optical adjustment processes: the design of a common installation platform of a room temperature optical window 6 and a low temperature optical element 1 is that an adiabatic support 4 is adopted between the low temperature optical element 1 and the room temperature optical window 6, the low temperature optical element 1 is firstly assembled and adjusted, the low temperature light source element 1 is installed in a lens barrel 7 at normal temperature, the lens barrel 7 is installed on the adiabatic support 4, the adiabatic support 4 is installed on an optical lens installation seat 5, the room temperature optical window 6 is arranged on the optical lens installation seat 5, then the optical assembly and adjustment are integrally carried out, and the position relation between the room temperature optical window 6 and the low temperature light source element 1 is adjusted.
As shown in fig. 8 and 9, the low-temperature cold source 2 and the low-temperature optical element 1 are integrated together, and the cold energy conduction is carried out through the flexible heat conduction belt 3, so that the installation precision of the low-temperature optical system can be ensured to be maintained while the low-temperature optical system is refrigerated; and the low-temperature optical element 1 and the room-temperature optical window 6 are arranged on a platform, and the heat insulation support 4 is used in the middle, so that the requirements of low-temperature refrigeration and adjustment of the low-temperature optical element 1 can be met.
The whole installation process is as follows: the low-temperature optical element 1 is firstly installed in the lens barrel 7 at room temperature according to an optical adjustment method, then the lens barrel 7 is fixed in the heat insulation support 4, and then the heat insulation support 4 is installed on the optical lens installation seat 5, and the optical lens installation seat 5 is provided with an installation surface of an optical window at room temperature. Because the room temperature optical window 6 is a lens, the lens has certain focal power and needs to be optically adjusted. The above combination is placed on an optical center deviation measuring instrument, the position of a room temperature optical window 6 is adjusted by taking the assembled lens barrel component optical element as a reference, so that the position relation between the room temperature optical window 6 and a low temperature optical element 1 meets the optical adjustment requirement, and a gap between the room temperature optical window 6 and an optical lens mounting seat 5 is filled with an adhesive, so that the low temperature optical element is mounted on the same mounting platform.
The lower end of the flexible heat conduction band 3 is mounted on the mounting surface of the heat insulation support 4. The mounting surface is close to the supporting surface of the lens barrel 7, so that the cooling capacity conduction path is as short as possible. The flexible heat conduction band 3, the heat insulation support 4 and the lens barrel 7 are mounted on the lower housing 213, and then mounted on the upper housing 211, the cover plate 212 is opened, and the flexible heat conduction band 3 is mounted on the bottom of the liquid nitrogen storage tank 22. The cover plate 212 is mounted back to the upper housing. After the installation is completed, the tightness of the whole device is checked. Vacuumizing the refrigerator until the vacuum degree is reduced to 1.0X10 -2 Below Pa, liquid nitrogen is added to the liquid nitrogen tank 22, and the cold is transferred to the lens barrel 7 along the flexible heat-conducting belt 3, and then the low-temperature optical element 1 is cooled to a low temperature. The imaging focal plane of the optical system is located behind the rear window 8, and the imaging quality of the optical system can be tested by the imaging sensor.
Wherein, the refrigerating plant can be dismantled, conveniently changes the gasket of low temperature optical element 1 and conveniently carries out the dress of low temperature optical element 1 and transfers. In addition, the refrigerating device also has function expansibility, and after the heating plate is arranged on the outer side of the lens cone 7, the temperature change control of the optical system can be realized by being connected with an external temperature controller. The invention effectively solves the problems of refrigeration and optical adjustment of the transmission type low-temperature optical system in the limited space.
A further aspect of the present invention is to provide a cryogenic optical system comprising a cryogenic optical element 1 and a refrigeration device for a cryogenic optical element as described above, said cryogenic optical element being disposed inside a thermally insulating support 4.
The low-temperature optical system provided by the invention has various advantages as described above due to the inclusion of the refrigerating device for the low-temperature optical element as described above.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A refrigeration device for a cryogenic optical element for refrigerating the cryogenic optical element, comprising:
a low-temperature cold source for providing a low temperature to the low-temperature optical element;
one end of the flexible heat conduction belt is connected with the low-temperature cold source, and the other end of the flexible heat conduction belt is connected with the low-temperature optical element;
a heat insulating support having one side for disposing the cryogenic optical element;
the optical lens mounting seat is arranged on the other side of the heat insulation support, and a room-temperature optical window is arranged on the optical lens mounting seat.
2. The refrigeration apparatus for a cryogenic optical element according to claim 1, wherein the adiabatic support is of a ring-shaped structure, comprising at least a first ring-shaped body, an inner side of which is used for disposing the cryogenic optical element, and an outer side of which is provided with the optical lens mount.
3. The refrigerating apparatus for a cryogenic optical element according to claim 2, wherein the heat insulating support is provided in a hollowed-out structure, further comprising a second annular body and a third annular body, and the first annular body, the second annular body and the third annular body are provided along an axial direction thereof; and the second annular body is connected with the first annular body and the second annular body is connected with the third annular body through connecting rods.
4. The refrigeration device for a cryogenic optical element according to claim 1, further comprising a lens barrel for carrying the cryogenic optical element, and the lens barrel is disposed inside the heat insulating support.
5. The refrigeration device for a cryogenic optical element according to claim 1, wherein the cryogenic cold source uses cryogenic liquid nitrogen, comprising:
a liquid nitrogen dewar;
the liquid nitrogen storage tank is arranged in the liquid nitrogen Dewar tank, and the bottom of the liquid nitrogen storage tank is provided with a guide pillar used for being connected with the flexible heat conduction belt;
and one end of the neck pipe is connected with the top of the liquid nitrogen Dewar tank, and the other end of the neck pipe is connected with the liquid nitrogen storage tank.
6. The refrigeration device for a cryogenic optical element of claim 5, wherein the liquid nitrogen dewar comprises:
the liquid nitrogen storage tank is arranged in the upper shell, and a mounting hole is formed in the side wall of the upper shell;
the cover plate is arranged at the mounting hole and hinged with the upper shell;
the lower shell is arranged at the bottom of the upper shell, one side of the lower shell is embedded with the optical lens mounting seat, and the inside of the lower shell is provided with the heat insulation support and the optical lens mounting seat.
7. The refrigeration device for a cryogenic optical element according to claim 6, wherein a side of the lower housing opposite to the optical lens mount is provided with a rear window.
8. The refrigerating apparatus for a low-temperature optical element according to claim 1, wherein the material of the flexible heat-conducting tape is oxygen-free copper or red copper.
9. The refrigerating apparatus for a cryogenic optical element according to claim 1, wherein the material of the heat insulating support is 4J29, stainless steel 316 or titanium alloy.
10. A cryogenic optical system, comprising: a cryogenic optical element and a refrigeration device for a cryogenic optical element according to any one of claims 1 to 9, the cryogenic optical element being disposed inside the thermally insulating support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210529870.2A CN117111253A (en) | 2022-05-16 | 2022-05-16 | Refrigerating device for low-temperature optical element and low-temperature optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210529870.2A CN117111253A (en) | 2022-05-16 | 2022-05-16 | Refrigerating device for low-temperature optical element and low-temperature optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117111253A true CN117111253A (en) | 2023-11-24 |
Family
ID=88802565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210529870.2A Pending CN117111253A (en) | 2022-05-16 | 2022-05-16 | Refrigerating device for low-temperature optical element and low-temperature optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117111253A (en) |
-
2022
- 2022-05-16 CN CN202210529870.2A patent/CN117111253A/en active Pending
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