CN107621679A - A kind of Low emissivity switchable diaphragm - Google Patents
A kind of Low emissivity switchable diaphragm Download PDFInfo
- Publication number
- CN107621679A CN107621679A CN201711108250.7A CN201711108250A CN107621679A CN 107621679 A CN107621679 A CN 107621679A CN 201711108250 A CN201711108250 A CN 201711108250A CN 107621679 A CN107621679 A CN 107621679A
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- CN
- China
- Prior art keywords
- liquid nitrogen
- heat sink
- switchable diaphragm
- switchable
- low emissivity
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Diaphragms For Cameras (AREA)
Abstract
The invention discloses a kind of Low emissivity switchable diaphragm, the Low emissivity switchable diaphragm includes：Low temperature electric machine, switchable diaphragm piece and heat sink.Switchable diaphragm piece is fixed on the bearing of low temperature electric machine, has the low temperature electric machine to drive switching aperture；The heat sink includes：The liquid nitrogen circulatory system, liquid nitrogen input pipe, return duct, heat sink and liquid nitrogen runner pipe, heat is conducted to heat sink by switchable diaphragm piece by heat radiation, liquid nitrogen runner pipe is provided with one side surface of the heat sink remote switchable diaphragm piece, the input port of liquid nitrogen runner pipe is connected to the liquid nitrogen circulatory system by liquid nitrogen input pipe, return duct respectively with delivery outlet, formed liquid nitrogen circulation will be heat sink on heat take away, cooled.The Low emissivity switchable diaphragm of the present invention solves the problems, such as that conventional low temperature diaphragm can not change by preparing heat sink for switchable diaphragm.
Description
Technical field
The present invention relates to optical technical field, and in particular to a kind of Low emissivity switchable diaphragm.
Background technology
Low emissivity switchable diaphragm is a kind of cold stop that can switch aperture at any time, and its function is carried for infrared test
For a series of test infrared point target source of various sizes of relatively low backgrounds.
Usual infrared diaphragm is handled without cooling, when there is some to need to reduce the small and weak infrared target of background detection
, it is necessary to cool to background in test, cooling processing can be carried out to diaphragm, but all be that fixed aperture is handled, it is not right
Switchable diaphragm carries out cooling processing, and therefore, obtained infrared target is the target of fixed size, is to enter in being tested with this
Row change, it is necessary to which diaphragm must be re-replaced when converting target sizes, program is cumbersome, also loses time very much.
The content of the invention
In order to solve at least one of technical problem, the present invention provides a kind of Low emissivity switchable diaphragm；For that can cut
Change diaphragm and prepare heat sink, solve the problems, such as that conventional low temperature diaphragm can not change.
To achieve the above object, the present invention uses following technical scheme：
A kind of Low emissivity switchable diaphragm, the Low emissivity switchable diaphragm include：Low temperature electric machine, switchable diaphragm piece and
Heat sink；
The low temperature electric machine includes a bearing stretched out；
The switchable diaphragm piece is a rosette, has a series of diameter in circular switchable diaphragm piece centers of circle different
Aperture；The switchable diaphragm piece is fixedly mounted on the bearing, the central axis of the switchable diaphragm piece and institute
The axis for stating bearing overlaps；
The heat sink includes：The liquid nitrogen circulatory system, liquid nitrogen input pipe, return duct, heat sink and liquid nitrogen runner pipe；
The liquid nitrogen circulatory system include compression pump, liquid nitrogen storage tank, to store liquid nitrogen and make liquid nitrogen liquid nitrogen input pipe,
Liquid nitrogen runner pipe and return duct internal circulation flow, will be heat sink on heat by way of liquid nitrogen gasification after return duct reclaims will
Nitrogen discharge is gone out；The liquid nitrogen circulatory system also has delivery outlet and recovery port；
It is described it is heat sink be a metallic plate, be oppositely arranged with the switchable diaphragm piece；It is described it is heat sink have one with it is described
The corresponding fabrication hole of bearing, central shaft overlap with the axis of the bearing, to the switchable diaphragm piece behind sky and
Bearing carries out installation and maintenance operation, and avoids significantly cooling to bearing；It is described heat sink also with one and the switchable diaphragm
The heat sink light hole that aperture on piece is correspondingly arranged, the diameter of the heat sink light hole are more than the maximum of the aperture directly
Footpath；The low temperature electric machine drives the switchable diaphragm piece to rotate, and the aperture for switching different-diameter is directed at the heat sink thang-kng
Hole；It is described heat sink to be installed with the liquid nitrogen runner pipe on a side surface of the switchable diaphragm piece；
The input port of the liquid nitrogen runner pipe is connected with one end of the liquid nitrogen input pipe, delivery outlet and the return duct
One end connects；The other end of the liquid nitrogen input pipe is connected with the delivery outlet of the liquid nitrogen circulatory system；The return duct it is another
One end is connected with the recovery port of the liquid nitrogen circulatory system.
Preferably, it is lined with bearing heat insulating mattress between the switchable diaphragm piece and the bearing.
Preferably, what the liquid nitrogen runner pipe rondo was rolled over is welded on described heat sink away from the one of the switchable diaphragm piece
On side surface.
Preferably, the material of the liquid nitrogen runner pipe is metal；The material of the liquid nitrogen input pipe and return duct is copper
Alloy.
Preferably, the switchable diaphragm piece is fixedly mounted on the head of the bearing.
Preferably, the thickness of the switchable diaphragm piece is 1mm.
Preferably, the switchable diaphragm piece is less than 1mm with the distance between heat sink.
Preferably, a diameter of 10mm of the fabrication hole；A diameter of 15mm of the heat sink light hole.
Preferably, it is described it is heat sink be rectangular metallic plate, thickness 2mm；The fabrication hole positioned at it is described it is heat sink in
Heart position, the heat sink light hole are located at the heat sink metallic plate of top 1/5 described in the top distance of the fabrication hole and highly located.
Preferably, the heat sink thickness is 2mm.
Beneficial effects of the present invention
Low emissivity switchable diaphragm provided by the invention solves conventional low temperature by preparing heat sink for switchable diaphragm
The problem of diaphragm can not change.
Brief description of the drawings
Fig. 1 is a kind of Low emissivity switchable diaphragm structural representation of the present invention；
Fig. 2 is the schematic diagram of Fig. 1 left view；
Fig. 3 is a kind of Low emissivity switchable diaphragm operating diagram of the present invention；
Description of reference numerals：The 1- liquid nitrogen circulatory system, 2- liquid nitrogen input pipe, 3- return ducts, 4- is heat sink, 5- fabrication holes, 6-
Heat sink light hole, 7- low temperature electric machines, 8- bearings, 9- bearings heat insulating mattress, 10- switchable diaphragms piece, 11- apertures, 12- black matrixes,
13- optical projection systems.
Embodiment
The present invention is specifically described below by embodiment, it is necessary to it is pointed out here that be that the present embodiment is served only for pair
The present invention is further described, it is impossible to is interpreted as limiting the scope of the invention, the person skilled in the art in the field can
Some nonessential modifications and adaptations are made with the content of the invention more than.In the case where not conflicting, the reality in the present invention
Applying the feature in example and embodiment can be mutually combined.
As illustrated in fig. 1 and 2, a kind of Low emissivity switchable diaphragm, including：Low temperature electric machine 7, switchable diaphragm piece 10 and cooling
Device；
The low temperature electric machine 7 includes a bearing 8 stretched out；The low temperature electric machine 7 can be in the environment of vacuum and -40 DEG C
Work；
The switchable diaphragm piece 10 is a rosette, has a series of diameter in circular switchable diaphragm piece centers of circle not
Same aperture 11；The switchable diaphragm piece 10 is fixedly mounted on the bearing 8, the center of the switchable diaphragm piece 10
Axis overlaps with the axis of the bearing 8；Preferably, be lined between the switchable diaphragm piece 10 and the bearing 8 bearing every
Heat pad 9, the effect of bearing heat insulating mattress 9 is connection bearing 8 and switchable diaphragm piece 10, while does not allow to carry out heat between the two again
Exchange；In the preferred scheme that the present embodiment provides, the switchable diaphragm piece 10 is fixedly mounted on the head of the bearing 8；It is excellent
Selection of land, the thickness about 1mm of the switchable diaphragm piece 10；
The heat sink includes：The liquid nitrogen circulatory system 1, liquid nitrogen input pipe 2, return duct 3, heat sink 4 and liquid nitrogen runner pipe；
The liquid nitrogen circulatory system includes compression pump, liquid nitrogen storage tank, to store liquid nitrogen and make liquid nitrogen in liquid nitrogen input pipe
2nd, liquid nitrogen runner pipe and the internal circulation flow of return duct 3, the heat on heat sink 4 is returned by way of liquid nitrogen gasification through return duct 3
Nitrogen discharge is gone out after receipts；The liquid nitrogen circulatory system 1 also has delivery outlet and recovery port；
Described heat sink 4 be a metallic plate, is oppositely arranged with the switchable diaphragm piece 10；Preferably, the changeable light
Late piece 10 and heat sink the distance between 4 is less than 1mm；Described heat sink 4 have a fabrication hole corresponding with the bearing 8, its
Central shaft overlaps with the axis of the bearing 8, to carry out installation and maintenance behaviour to the switchable diaphragm piece 10 behind sky and bearing 8
Make, and avoid significantly cooling to bearing 8；Described heat sink 4 also have one and the aperture 11 on the switchable diaphragm piece 10
The heat sink light hole 6 being correspondingly arranged, the diameter of the heat sink light hole 6 are more than the maximum gauge of the aperture 11；It is described low
Warm motor 7 drives the switchable diaphragm piece 10 to rotate, and the aperture 11 for switching different-diameter is directed at the heat sink light hole 6；
Described heat sink 4 are installed with the liquid nitrogen runner pipe on a side surface of the switchable diaphragm piece 10；This is preferred real
Apply in example, the liquid nitrogen runner pipe rondo folding is welded on the described heat sink 4 side tables for deviating from the switchable diaphragm piece 10
On face, cooling-down effect can be strengthened；Preferably, a diameter of 10mm of the fabrication hole 5；The heat sink light hole 6 it is a diameter of
15mm。
Preferably, described heat sink 4 be rectangular metallic plate, thickness 2mm；The fabrication hole 5 is positioned at described heat sink 4
Center, the heat sink light hole 6 are located at heat sink 4 top 1/5 metallic plate height described in the top distance of the fabrication hole 5
Place.
The input port of the liquid nitrogen runner pipe is connected with one end of the liquid nitrogen input pipe 2, delivery outlet and the return duct 3
One end connection；The other end of the liquid nitrogen input pipe 2 is connected with the delivery outlet of the liquid nitrogen circulatory system 1；The return duct 3
The other end be connected with the recovery port of the liquid nitrogen circulatory system 1.Preferably, the material of the liquid nitrogen runner pipe is metal；Institute
The material for stating liquid nitrogen input pipe 2 and return duct 3 is the alloy of copper.
A kind of Low emissivity switchable diaphragm provided by the invention needs to work under vacuum conditions.
Low temperature electric machine 7 can be operated under vacuum and -40 DEG C of environment, and effect is to provide the driving force of rotary motion, low
A bearing 8, the axis of bearing 8 and the center overlapping of axles of fabrication hole 5 are stretched out towards the position at the center of fabrication hole 5 in warm motor 7,
The head of bearing 8 is connected by bearing heat insulating mattress 9 and switchable diaphragm piece 10, axis and the bearing 8 of switchable diaphragm piece 10
Axis overlaps.The effect of bearing heat insulating mattress 9 is connection bearing and diaphragm, while does not allow to carry out hot friendship between bearing and diaphragm again
Change.Bearing 8, bearing heat insulating mattress 9, switchable diaphragm piece 10 are fixed together, can be under the driving of low temperature electric machine 7 around bearing 8
Rotate.
As shown in figure 3, when Low emissivity switchable diaphragm works, black matrix 12 is located at the switchable diaphragm piece 10 away from described
Heat sink 4 side, the infrared signal that the black matrix 12 radiates forms infrared point radiation by the constraint of aperture 11, by heat sink thang-kng
Hole 6 enters optical projection system 13.The progress of the liquid nitrogen circulatory system 1 liquid nitrogen is circulated to heat sink 4, heat sink 4 and changeable light during work
The distance of late piece 1 is very near, and the efficiency of radiant heat exchange is very high, ensures that the heat on switchable diaphragm piece 1 is conducted to institute at any time
Heat sink 4 are stated, so as to keep the low-temperature condition of switchable diaphragm piece 10；When needing to switch aperture 11, low temperature electric machine 7 is with dynamic bearing
8 rotations, switchable diaphragm piece 10 switch to corresponding position, now need the axis of the aperture 11 of work just to lead to heat sink
The axis of unthreaded hole 6 is overlapped, and the infra-red radiation formation infrared point radiation for constraining black matrix 12 below is launched through optical projection system 13.
Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, belongs to the scope of the present invention.
Claims (10)
1. a kind of Low emissivity switchable diaphragm, it is characterised in that the Low emissivity switchable diaphragm includes：Low temperature electric machine, it can cut
Change diaphragm piece and heat sink；
The low temperature electric machine includes a bearing stretched out；
The switchable diaphragm piece is a rosette, has a series of different light of the diameter in circular switchable diaphragm piece centers of circle
Late hole；The switchable diaphragm piece is fixedly mounted on the bearing, central axis and the axle of the switchable diaphragm piece
The axis held overlaps；
The heat sink includes：The liquid nitrogen circulatory system, liquid nitrogen input pipe, return duct, heat sink and liquid nitrogen runner pipe；
The liquid nitrogen circulatory system includes compression pump, liquid nitrogen storage tank, to store liquid nitrogen and make liquid nitrogen in liquid nitrogen input pipe, liquid nitrogen
Runner pipe and return duct internal circulation flow, will be heat sink on heat by way of liquid nitrogen gasification after return duct reclaims by nitrogen
Emit；The liquid nitrogen circulatory system also has delivery outlet and recovery port；
It is described it is heat sink be a metallic plate, be oppositely arranged with the switchable diaphragm piece；Described heat sink have one and the bearing
Corresponding fabrication hole, central shaft overlap with the axis of the bearing, to the switchable diaphragm piece and bearing behind sky
Installation and maintenance operation is carried out, and avoids significantly cooling to bearing；It is described heat sink also with one and the switchable diaphragm piece
On the heat sink light hole that is correspondingly arranged of aperture, the diameter of the heat sink light hole is more than the maximum gauge of the aperture；
The low temperature electric machine drives the switchable diaphragm piece to rotate, and the aperture for switching different-diameter is directed at the heat sink light hole；
It is described heat sink to be installed with the liquid nitrogen runner pipe on a side surface of the switchable diaphragm piece；
The input port of the liquid nitrogen runner pipe is connected with one end of the liquid nitrogen input pipe, one end of delivery outlet and the return duct
Connection；The other end of the liquid nitrogen input pipe is connected with the delivery outlet of the liquid nitrogen circulatory system；The other end of the return duct
It is connected with the recovery port of the liquid nitrogen circulatory system.
2. Low emissivity switchable diaphragm according to claim 1, it is characterised in that the switchable diaphragm piece and the axle
Bearing heat insulating mattress is lined between holding.
3. Low emissivity switchable diaphragm according to claim 1, it is characterised in that the liquid nitrogen runner pipe rondo folding
It is welded on described heat sink on a side surface of the switchable diaphragm piece.
4. Low emissivity switchable diaphragm according to claim 1, it is characterised in that the material of the liquid nitrogen runner pipe is gold
Category；The material of the liquid nitrogen input pipe and return duct is the alloy of copper.
5. Low emissivity switchable diaphragm according to claim 1, it is characterised in that the switchable diaphragm piece is fixedly mounted
On the head of the bearing.
6. Low emissivity switchable diaphragm according to claim 1, it is characterised in that the thickness of the switchable diaphragm piece is
1mm。
7. Low emissivity switchable diaphragm according to claim 1, it is characterised in that the switchable diaphragm piece with it is heat sink it
Between distance be less than 1mm.
8. Low emissivity switchable diaphragm according to claim 1, it is characterised in that a diameter of 10mm of the fabrication hole；
A diameter of 15mm of the heat sink light hole.
9. Low emissivity switchable diaphragm according to claim 1, it is characterised in that it is described it is heat sink be rectangular metal
Plate；The fabrication hole is located at the heat sink center, and the heat sink light hole is located at the top distance institute of the fabrication hole
The heat sink metallic plate of top 1/5 is stated highly to locate.
10. Low emissivity switchable diaphragm according to claim 1, it is characterised in that the heat sink thickness is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711108250.7A CN107621679A (en) | 2017-11-08 | 2017-11-08 | A kind of Low emissivity switchable diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711108250.7A CN107621679A (en) | 2017-11-08 | 2017-11-08 | A kind of Low emissivity switchable diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107621679A true CN107621679A (en) | 2018-01-23 |
Family
ID=61099025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711108250.7A Pending CN107621679A (en) | 2017-11-08 | 2017-11-08 | A kind of Low emissivity switchable diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107621679A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541429A (en) * | 2018-12-28 | 2019-03-29 | 佛山科学技术学院 | A kind of photo-thermal electricity THM coupling device testing apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033098A (en) * | 2012-11-27 | 2013-04-10 | 凯迈（洛阳）测控有限公司 | Manual diaphragm black body |
-
2017
- 2017-11-08 CN CN201711108250.7A patent/CN107621679A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033098A (en) * | 2012-11-27 | 2013-04-10 | 凯迈（洛阳）测控有限公司 | Manual diaphragm black body |
Non-Patent Citations (1)
| Title |
|---|
| 徐冰: "低温真空环境的红外背景模拟器的研制", 《航天器环境工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541429A (en) * | 2018-12-28 | 2019-03-29 | 佛山科学技术学院 | A kind of photo-thermal electricity THM coupling device testing apparatus |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180123 |
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