CN206757274U - A kind of space camera active refrigeration vacuum sealing focal plane subassembly - Google Patents
A kind of space camera active refrigeration vacuum sealing focal plane subassembly Download PDFInfo
- Publication number
- CN206757274U CN206757274U CN201720540772.3U CN201720540772U CN206757274U CN 206757274 U CN206757274 U CN 206757274U CN 201720540772 U CN201720540772 U CN 201720540772U CN 206757274 U CN206757274 U CN 206757274U
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- focal plane
- vacuum
- casing
- cold screen
- active refrigeration
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Abstract
The utility model proposes a kind of active refrigeration, vacuum-packed space camera active refrigeration vacuum sealing focal plane subassembly, and detector can freeze to less than 60 DEG C, effectively solves the problems, such as moisture contamination during traditional camera focal plane detector refrigeration.The component is repaiied including focal plane case cuts pad, trim ring, vacuum glazing, vacuum focal plane casing, vacuum sealing connector, cooling assembly, focal plane bottom seat, focal plane bottom plate, heat pipe, relaying casing, thermistor and TEC；Vacuum glazing is sealed by trim ring and compresses incidence hole, and the front end of trim ring, which is provided with focal plane case, repaiies and cut pad；Cooling assembly includes cold screen window, cold screen, active refrigeration CCD components and cold screen substrate；Cold screen window is arranged in cold screen breach；The back side of cold screen substrate is provided with multiple TECs and thermistor；Cooling assembly, focal plane bottom seat, focal plane bottom plate, heat pipe are arranged in vacuum focal plane casing and the cavity for relaying casing composition, and the back side of focal plane bottom plate is provided with heat pipe.
Description
Technical field
It the utility model is related to camera sealing device field, and in particular to a kind of space camera active refrigeration vacuum sealing is burnt
Face component.
Background technology
The space astronomy camera integration time length of dark weak signal target is observed, the requirement suppressed to noise of detector is very high, typically
Detector dark current is reduced by the way of refrigeration detector, improves camera signal to noise ratio.Thermoelectric cooling (Thermo-Electric
Cooling, TEC) technology is a kind of refrigerating method using peltier effect, it does not need any working medium, no-movable part, knot
Structure is simple, is extremely suitable for the refrigeration application of camera space focal plane, but when spacecraft cooling focal plane carries out testing experiment on ground,
Refrigeration focal plane temperature is generally below ambient dew point, and condensation vapor has a strong impact on testing experiment effect to low temperature detector surface, very
To space probe may be damaged.
Coagulate white phenomenon to eliminate condensation, camera space on the ground testing experiment when focal plane case is typically stored in nitrogen cabinet
In, make to be filled with nitrogen in focal plane, and moisture is absorbed using drier.But this mode is for needing to carry out testing experiment for a long time
Astronomical camera, steam can slowly enter casing, influence to test effect, and the powder of drier can pollute focal plane, be unfavorable for
AEROSPACE APPLICATION.
Traditional camera space focal plane case typically uses the aluminum alloy materials of good heat conductivity.It is but very low for cryogenic temperature
Astronomical camera focal plane for, the thermal conductive resin of aluminium alloy can make the temperature of seal glass window be reduced to dew-point temperature with
Under, make condensation vapor to glass window, be unfavorable for testing experiment, while the thermal coefficient of expansion of aluminium alloy and TEC is not
Matching, TEC can be made to produce larger thermal stress, reduce focal plane security.
Utility model content
To solve the technical problem of existing low temperature focal plane condensation vapor, the utility model provides a kind of active refrigeration, true
The space camera active refrigeration vacuum sealing focal plane subassembly of sky sealing, detector can be freezed and arrive less than -60 DEG C, effectively solved
Moisture contamination problem when traditional camera focal plane detector freezes.
Technical solution provided by the utility model is：
A kind of space camera active refrigeration vacuum sealing focal plane subassembly, including focal plane case are repaiied and cut pad 1, trim ring 2, vacuum
Windowpane 3, vacuum focal plane casing 4, vacuum sealing connector 7, cooling assembly, focal plane bottom seat 10, focal plane bottom plate 11, heat pipe
12nd, casing 13, thermistor and TEC 14 are relayed；The front end of vacuum focal plane casing 4 is provided with incidence hole, outside incidence hole
Edge be provided with boss, vacuum glazing 3 is sealed by trim ring 2 and compresses incidence hole, and the front end of trim ring 2, which is provided with focal plane case, repaiies and cut
Pad 1；The side of vacuum focal plane casing 4 is provided with insert hole；The side of vacuum focal plane casing 4 is provided with vacuum suction interface 15 and very
Porosimter interface 16；Cooling assembly is arranged in the cavity of focal plane bottom seat 10；Cooling assembly include cold screen window 5, cold screen 6,
Active refrigeration CCD components 8 and cold screen substrate 9；The front end of cold screen 6 is provided with breach, and cold screen window 5 is arranged in breach；Cold screen bottom
Plate 9 is provided with window, and active refrigeration CCD components 8 are arranged between cold screen 6 and cold screen substrate 9, the back side of active refrigeration CCD components 8 peace
The window of the TEC 14 and thermistor of dress through cold screen substrate 9 is stretched out outside cold screen substrate 9, the back side of cold screen substrate 9
Provided with multiple TECs 14 and thermistor, active refrigeration CCD components 8, thermistor and TEC 14 are by true
The insert hole of the empty side of focal plane casing 4 is connected with vacuum sealing connector 7；Cooling assembly, focal plane bottom seat 10, focal plane bottom plate
11st, heat pipe 12 is arranged at vacuum focal plane casing 4 and relayed in the cavity that casing 13 forms；Focal plane bottom plate 11 is arranged on focal plane
The rear of bottom seat 10, the back side of focal plane bottom plate 11 are provided with heat pipe 12, using focal plane bottom seat 10 and focal plane bottom plate 11
Seal the rear end of vacuum focal plane casing 4；The contact surface of vacuum focal plane casing 4 and vacuum glazing 3, vacuum focal plane casing 4 and focal plane
Sealing ring is equipped with the contact surface of the contact surface of bottom seat 10, focal plane bottom seat 10 and focal plane bottom plate 11.
Further, the material of vacuum focal plane casing 4 is titanium alloy.The relatively low coefficient of heat conduction of titanium alloy can effectively improve
Vacuum glass window temperature, prevent condensation vapor to glass window.
Further, the section of vacuum sealing connector 7 is track type circular section, and the section of vacuum sealing connector 7 is provided with rubber
Rubber cushion 17.Ensure the vacuum leakproofness with extraneous electrical connections.
Further, the surrounding of vacuum focal plane casing 4 is evenly arranged with eight lugs, and the surrounding of relaying casing 13 is provided with
Eight screwing through hole, the vacuum focal plane casing 4 are fixedly connected with relaying casing 13 respectively by screw.
Further, focal plane bottom plate 11 is using the modulated molybdenum-copper bottom plate of thermal coefficient of expansion.Selection and thermoelectricity system
The molybdenum-copper material of cooler (TEC) material thermal expansion coefficient matching solves TEC under big temperature difference condition as focal plane bottom plate
Thermal stress issues, meet the requirement of camera space focusing plane case high rigidity, high intensity and high reliability.
Further, the back side of cold screen substrate 9 is provided with four TECs 14 and four thermistors；Active refrigeration
The back mounted TEC 14 of CCD components 8 and thermistor quantity are two.
Further, it is provided with heat insulating mattress between vacuum focal plane casing 4 and relaying casing 13.
Further, the substrate of active refrigeration CCD components 8 is aluminium nitride ceramics, the gold-plated processing of other surfaces outside photosurface,
Reduce radiation heat transfer.
Further, the surfaces externally and internally of cold screen 6 and cold screen substrate 9 carries out gold-plated processing, and focal plane bottom plate 11 is towards master
The gold-plated processing in side of dynamic refrigeration CCD components 8, reduces radiation heat transfer.
Further, coated with thermally conductive silicone grease between the contact surface of heat pipe 12 and focal plane bottom plate 11, to reduce thermal contact resistance.
The advantages of the utility model is：
1. can effectively be solved when traditional camera focal plane detector freezes by detector active refrigeration to less than -60 DEG C
Moisture contamination problem.
2nd, selection with the molybdenum-copper material that TEC (TEC) material thermal expansion coefficient matches as focal plane bottom plate,
Solve the thermal stress issues of TEC under big temperature difference condition, meet camera space focusing plane case high rigidity, high intensity and highly reliable
The requirement of property.
The structure such as detachable vacuum seal when 3. focal plane subassembly has active refrigeration, vacuum sealing, small light, transmitting
Feature.
4th, the utility model is sealed using rubber seal to cavity where camera focal plane CCD/CMOS, is solved
Steam into focal plane cavity focusing plane pollute the problem of.
5th, the utility model focal plane case side wall has vacuum suction interface and vacuometer interface, can be in real-time display focal plane case
Portion's air pressure.
6th, the CCD component externals inside the utility model focal plane case are covered with cold screen, and cold screen is made using 4 small-sized TEC
It is cold, low temperature environment is created for internal focal plane, reduces influence of the exterior space heat radiation to CCD temperature to greatest extent.
7th, connector is contacted using track type circular section rubber blanket with focal plane case side wall in the utility model, is ensured and the external world
The vacuum leakproofness of electrical connections.
8th, the sub-buckle structure design in the utility model between part, the overall closure of focal plane case had both been met, had been prevented again
There is the problems such as electromagnetic leakage in focal plane case.
9th, the bottom plate of focal plane case uses the material of TEC in molybdenum-copper material, with CCD components in the utility model
Expect that thermal coefficient of expansion is consistent, ensure security of the TEC in a wide range of temperature changing process.
Brief description of the drawings
Fig. 1 is camera vacuum focal plane case overall structure sectional view；
Fig. 2 is the explosive view of camera vacuum focal plane case；
Fig. 3 is vacuum focal plane case shell mechanism schematic diagram；
Fig. 4 is CCD components and gold-plated cold screen structural representation；
Fig. 5 is the structural representation of vacuum sealing connector.
Wherein reference is：1- focal plane casees, which are repaiied, cuts pad, 2- trim rings, 3- vacuum glazings, 4- vacuum focal plane casings, 5-
Cold screen window, the cold screens of 6-, 7- vacuum sealing connectors, 8- active refrigeration CCD components, the cold screen substrates of 9-, 10- focal plane bottom seats,
11- focal plane bottom plates, 12- heat pipes, 13- relaying casings, 14- TECs (TEC), 15- vacuum suction interfaces, 16- vacuum
Degree meter interface, 17- rubber blankets.
Embodiment
Content of the present utility model is described in further detail below in conjunction with the drawings and specific embodiments：
As shown in Figure 1, Figure 2, Figure 3 shows, space camera active refrigeration vacuum sealing focal plane subassembly is repaiied including focal plane case and cuts pad
1st, trim ring 2, vacuum glazing 3, vacuum focal plane casing 4, vacuum sealing connector 7, cooling assembly, focal plane bottom seat 10, focal plane
Bottom plate 11, heat pipe 12, relaying casing 13, thermistor and TEC 14；The front end of vacuum focal plane casing 4 is provided with into light
Hole, the edge outside incidence hole are provided with boss, and vacuum glazing 3 is sealed on the casing being pressed on outside incidence hole by trim ring 2, pressure
The front end of circle 2, which is provided with focal plane case and repaiied, cuts pad 1；The side of vacuum focal plane casing 4 is provided with insert hole；Vacuum focal plane casing 4
Side is provided with vacuum suction interface 15 and vacuometer interface 16；Cooling assembly is arranged in the cavity of focal plane bottom seat 10；System
Cold component includes cold screen window 5, cold screen 6, active refrigeration CCD components 8 and cold screen substrate 9；The front end of cold screen 6 is provided with breach, cold
Shield window 5 to be arranged in breach, active refrigeration CCD components 8 are arranged between cold screen 6 and cold screen substrate 9；Cold screen substrate 9 is provided with
Window, 8 back mounted TEC 14 of active refrigeration CCD components and thermistor stretch out cold through the cold window of screen substrate 9
Outside screen substrate 9, the back side of cold screen substrate 9 is provided with multiple TECs 14 and thermistor, active refrigeration CCD components 8, temperature-sensitive
Resistance and TEC 14 are connected by the insert hole of the side of vacuum focal plane casing 4 with two vacuum sealing connectors 7.
Cooling assembly, focal plane bottom seat 10, focal plane bottom plate 11, heat pipe 12 are arranged at vacuum focal plane casing 4 and relaying
In the cavity that casing 13 forms；Focal plane bottom plate 11 is arranged on the rear of focal plane bottom seat 10, and the back side of focal plane bottom plate 11 is set
Heat pipe 12 is equipped with, the rear end of vacuum focal plane casing 4 is sealed using focal plane bottom seat 10 and focal plane bottom plate 11.Vacuum focal plane casing 4
Contact surface, focal plane bottom seat 10 and the focal plane of contact surface, vacuum focal plane casing 4 and focal plane bottom seat 10 with vacuum glazing 3
Sealing ring is equipped with the contact surface of bottom plate 11.
The front end of vacuum focal plane casing 4 is connected with camera rear optical system flange, is designed using flange, and it is burnt to prevent that veiling glare from entering
Face, the front end incidence hole of vacuum focal plane casing 4 is sealed using vacuum glazing 3, using focal plane bottom seat 10 and molybdenum-copper focal plane
Bottom plate 11 seals the rear end of vacuum focal plane casing 4, and active refrigeration CCD components 8, back are installed on molybdenum-copper focal plane bottom plate 11
Using heat pipe 12 is installed, the heat of CCD components is transferred out, vacuum focal plane casing 4 with relaying casing 13 using screw and every
Heat pad is connected, and relaying casing 13 is connected with rear end focal plane electronic packages.CCD components are freezed by two two level TEC, CCD components
Outer cover low temperature cold screen 6.
Focal plane case, which is repaiied, to be cut pad 1 and is located between the front end of vacuum focal plane casing 4 and rear optical system, and focal plane case, which is repaiied, cuts pad 1
Made, can be entered with perpendicularity and focal plane case of the focusing plane case for optical axis for the distance of rear optical system using heat-barrier material
Row is repaiied and cut, and can completely cut off the heat transfer of front panel again to vacuum focal plane case.
The thickness of vacuum glazing 3 is calculated analytically, and the thickness of vacuum glazing 3 is 8 ㎜, a diameter of 40 ㎜, can
Ensure optics focal plane correct position, and can ensures face shape at atmosheric pressure, and vacuum glazing 3 is arranged on true using trim ring 2
The empty front end of focal plane casing 4.Sealing effectiveness is obtained using rubber blanket.
The substrate of active refrigeration CCD components 8 is aluminium nitride ceramics, in addition to photosurface, the gold-plated processing of CCD component other surfaces.
2 thermistors are pasted in CCD module boards upper surface close to read-out area, for CCD temperature to be monitored and controlled.CCD flexible cables
It is connected with vacuum sealing connector 7, CCD substrates back uses two TEC active refrigerations, ensures the temperature in CCD runnings.
As shown in figure 4, gold-plated cold screen 6 and gold-plated cold screen substrate 9, are made using the higher aluminium alloy of thermal conductivity, in order to subtract
Small radiation heat transfer, its surfaces externally and internally carry out gold-plated processing, and cold screen substrate 9 is designed using symmetrical plug-in type, the left half of and right side half
While from the right and left insertion active refrigeration CCD components 8, TEC is avoided.Cold screen substrate 9 is connected by screw with cold screen 6, using 4
TEC refrigeration builds low-temp radiating environment for CCD, and the corresponding 4 TEC opening positions in the cold surface of screen 6 respectively paste a thermistor.Cold screen
Window 5 is corresponding with CCD photosurfaces, is cuboid window.
Molybdenum-copper bottom plate 11 is gold-plated towards CCD sides, and inner surface is 6 TEC hot junction mounting surface, passes through GD-414C
TEC is pasted on TEC substrate inner surfaces by black silicon rubber, and is connected by 12 screws with focal plane bottom seat 10, with rubber blanket
Realize vacuum sealing.The outer surface of focal plane bottom plate 11 is the evaporation ends mounting surface of heat pipe 12, two heat pipes by 12 mounting holes with
The back side of focal plane bottom plate 11 connects, coated with thermally conductive silicone grease between contact surface, to reduce thermal contact resistance.
Vacuum focal plane casing 4 is integrally formed processing and fabricating by titanium alloy, is pacified between rear optical system using Titanium Alloy Screw
Dress is fixed, and is connected by 12 screws.Two sides of focal plane casing are provided with 2 hermetically sealed connectors, are utilized respectively flexible cable
CCD and TEC is connected, two other side is respectively vacuum suction interface 15 and vacuometer interface 16.
As shown in figure 5, the Surface Machining annular groove of vacuum sealing connector 7, embedded track type circular section rubber blanket 17, with
Vacuum focal plane casing 4 is installed to obtain vacuum sealing effect.
Claims (10)
- A kind of 1. space camera active refrigeration vacuum sealing focal plane subassembly, it is characterised in that：Repaiied including focal plane case cut pad (1), Trim ring (2), vacuum glazing (3), vacuum focal plane casing (4), vacuum sealing connector (7), cooling assembly, focal plane bottom seat (10), focal plane bottom plate (11), heat pipe (12), relaying casing (13), thermistor and TEC (14)；The front end of vacuum focal plane casing (4) is provided with incidence hole, and the edge outside incidence hole is provided with boss, and vacuum glazing (3) is logical Trim ring (2) sealing incidence hole is crossed, the front end of trim ring (2), which is provided with focal plane case, repaiies and cut pad (1)；The side of vacuum focal plane casing (4) Face is provided with insert hole；The side of vacuum focal plane casing (4) is provided with vacuum suction interface (15) and vacuometer interface (16)；Cooling assembly is arranged in the cavity of focal plane bottom seat (10)；Cooling assembly includes cold screen window (5), cold screen (6), active Freeze CCD components (8) and cold screen substrate (9)；The front end of cold screen (6) is provided with breach, and cold screen window (5) is arranged in breach；It is cold Screen substrate (9) is provided with window, and active refrigeration CCD components (8) are arranged between cold screen (6) and cold screen substrate (9), active refrigeration The window of CCD components (8) back mounted TEC (14) and thermistor through cold screen substrate (9) stretches out cold screen substrate (9) outside, the back side of cold screen substrate (9) is provided with multiple TECs (14) and thermistor, active refrigeration CCD components (8), heat Quick resistance and TEC (14) are connected by the insert hole of vacuum focal plane casing (4) side with vacuum sealing connector (7)；Cooling assembly, focal plane bottom seat (10), focal plane bottom plate (11), heat pipe (12) be arranged at vacuum focal plane casing (4) and In the cavity for relaying casing (13) composition；Focal plane bottom plate (11) is arranged on the rear of focal plane bottom seat (10), focal plane bottom plate (11) the back side is provided with heat pipe (12), and vacuum focal plane casing is sealed using focal plane bottom seat (10) and focal plane bottom plate (11) (4) rear end；The contact surface of vacuum focal plane casing (4) and vacuum glazing (3), vacuum focal plane casing (4) and focal plane bottom seat (10) Sealing ring is equipped with the contact surface of contact surface, focal plane bottom seat (10) and focal plane bottom plate (11).
- 2. space camera active refrigeration vacuum sealing focal plane subassembly according to claim 1, it is characterised in that：Vacuum focal plane Casing (4) material is titanium alloy.
- 3. space camera active refrigeration vacuum sealing focal plane subassembly according to claim 2, it is characterised in that：Vacuum sealing Connector (7) section is track type circular section, and vacuum sealing connector (7) section is provided with rubber blanket (17).
- 4. the space camera active refrigeration vacuum sealing focal plane subassembly according to claim 1 or 2 or 3, it is characterised in that：Very The surrounding of empty focal plane casing (4) is evenly arranged with eight lugs, and the surrounding of relaying casing (13) is provided with eight screwing through hole, institute Vacuum focal plane casing (4) is stated to be fixedly connected with relaying casing (13) by screw.
- 5. space camera active refrigeration vacuum sealing focal plane subassembly according to claim 4, it is characterised in that：Focal plane bottom Plate (11) is using the modulated molybdenum-copper bottom plate of thermal coefficient of expansion.
- 6. space camera active refrigeration vacuum sealing focal plane subassembly according to claim 5, it is characterised in that：Cold screen substrate (9) the back side is provided with four TECs (14) and four thermistors；Active refrigeration CCD components (8) back mounted heat Electric refrigerator (14) and thermistor quantity are two.
- 7. space camera active refrigeration vacuum sealing focal plane subassembly according to claim 6, it is characterised in that：Vacuum focal plane Heat insulating mattress is provided between casing (4) and relaying casing (13).
- 8. space camera active refrigeration vacuum sealing focal plane subassembly according to claim 7, it is characterised in that：Active refrigeration CCD components (8) substrate is aluminium nitride ceramics, the gold-plated processing of other surfaces outside photosurface.
- 9. space camera active refrigeration vacuum sealing focal plane subassembly according to claim 8, it is characterised in that：Cold screen (6) Gold-plated processing is carried out with the surfaces externally and internally of cold screen substrate (9), and focal plane bottom plate (11) is towards active refrigeration CCD components (8) The gold-plated processing in side.
- 10. space camera active refrigeration vacuum sealing focal plane subassembly according to claim 9, it is characterised in that：Heat pipe (12) the coated with thermally conductive silicone grease between the contact surface of focal plane bottom plate (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720540772.3U CN206757274U (en) | 2017-05-16 | 2017-05-16 | A kind of space camera active refrigeration vacuum sealing focal plane subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720540772.3U CN206757274U (en) | 2017-05-16 | 2017-05-16 | A kind of space camera active refrigeration vacuum sealing focal plane subassembly |
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| Publication Number | Publication Date |
|---|---|
| CN206757274U true CN206757274U (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720540772.3U Withdrawn - After Issue CN206757274U (en) | 2017-05-16 | 2017-05-16 | A kind of space camera active refrigeration vacuum sealing focal plane subassembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN206757274U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045251A (en) * | 2017-05-16 | 2017-08-15 | 中国科学院西安光学精密机械研究所 | A kind of space camera active refrigeration vacuum sealing focal plane subassembly |
| CN111796474A (en) * | 2020-06-02 | 2020-10-20 | 中国科学院西安光学精密机械研究所 | Thermoelectric refrigeration focal plane device for space astronomical camera |
-
2017
- 2017-05-16 CN CN201720540772.3U patent/CN206757274U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045251A (en) * | 2017-05-16 | 2017-08-15 | 中国科学院西安光学精密机械研究所 | A kind of space camera active refrigeration vacuum sealing focal plane subassembly |
| CN107045251B (en) * | 2017-05-16 | 2022-08-19 | 中国科学院西安光学精密机械研究所 | Space camera active refrigeration vacuum seal focal plane assembly |
| CN111796474A (en) * | 2020-06-02 | 2020-10-20 | 中国科学院西安光学精密机械研究所 | Thermoelectric refrigeration focal plane device for space astronomical camera |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20171215 Effective date of abandoning: 20220819 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20171215 Effective date of abandoning: 20220819 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |