EP1468455A1 - Photodetecteur refroidi - Google Patents
Photodetecteur refroidiInfo
- Publication number
- EP1468455A1 EP1468455A1 EP02805805A EP02805805A EP1468455A1 EP 1468455 A1 EP1468455 A1 EP 1468455A1 EP 02805805 A EP02805805 A EP 02805805A EP 02805805 A EP02805805 A EP 02805805A EP 1468455 A1 EP1468455 A1 EP 1468455A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screen
- cooling
- cooled
- photodetector
- cooler
- Prior art date
- 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.)
- Withdrawn
Links
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 230000005855 radiation Effects 0.000 claims abstract description 5
- 230000003071 parasitic effect Effects 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 230000007935 neutral effect Effects 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
-
- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
- F25D19/006—Thermal coupling structure or interface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/44—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements the complete device being wholly immersed in a fluid other than air
- H01L23/445—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements the complete device being wholly immersed in a fluid other than air the fluid being a liquefied gas, e.g. in a cryogenic vessel
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/60—Arrangements for cooling, heating, ventilating or compensating for temperature fluctuations
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/02—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present invention relates to cooled photodetectors, thermal photodetectors or quantum photodetectors.
- the cooled photodetectors or more briefly photodetectors, generally consist of sensors mounted on a cold table, cooled by a cooler. More specifically, the table is located at the end of a well of a cryostat.
- Most highly sensitive photodetectors typically those for collecting thermal images, for example infrared images, need to be cooled to a cryogenic temperature.
- Joule Thomson expansion type cooler In the case of applications requiring very rapid cooling, of the order of a few seconds, a Joule Thomson expansion type cooler is used.
- coolers are in the form of a coil ending in a nozzle and they are supplied with a neutral gas at high pressure to eject a flow which, by isenthalpic expansion at the outlet of the nozzle, causes cooling and the table and of the coil.
- the expanded gas, flowing back on the coil of the cooler, therefore also cools the neutral gas which passes through it before it is ejected by the nozzle, and so on until liquefaction at the outlet of the nozzle.
- the thermal equilibrium of the photodetector is not achieved.
- the cold table has a thermal inertia which opposes it.
- the sensors must be sheltered from stray radiation by means of a screen, integral with the cold table, also cooled, and also having a thermal inertia to overcome.
- the entire photodetector must finally be at a temperature that is sufficiently homogeneous so as not to alter the captured image.
- mechanical devices have already been produced which make it possible both to improve the cooling of the cold table and to homogenize the temperature of the photodetector.
- the object of the present invention is to remedy this drawback.
- the invention relates to a cooled photodetector comprising a cold table, sensors mounted on the table, a screen to avoid parasitic radiation on the sensors, and at least one Joule-Thomson cooler to cool the table and the screen. , characterized in that the table and the screen are cooled by convection.
- the screen is cooled by a gas flow parallel to the one that cools the table, so without dragging.
- the photodetector is arranged so that the table and the screen are cooled concomitantly.
- the gas streams are ejected simultaneously on the table and on the screen. This reduces the thermal drag between the table and the screen.
- the photodetector comprises only one cooler to cool both the table and the screen.
- a part of the gas flow cooling the table is diverted to cool the screen at the same time.
- the table is pierced with orifices for the passage of the cooling flow communicating with an annular cavity for cooling the screen and the cavity for cooling the screen. extends between two cylindrical envelopes fixed on the table.
- FIG. 1 is a schematic view of a detector of the prior art
- FIG. 3 is a schematic sectional view of a first embodiment of the detector of the invention
- - Figure 4 is a schematic top view of the detector of Figure 3;
- FIG. 5 is a schematic sectional view of a second embodiment of the detector of the invention.
- Figure 6 is a schematic top view of the detector of Figure 5.
- a photodetector, or detector, 1 is usually made up of sensors (photodetectors) 2 mounted on a cold table 3 cooled by a cooler, here a Joule-Thomson probe mounted in a cryostat well (cold finger) 4 and consisting of a coil 5 supplied with high pressure neutral gas and terminated by a nozzle 6 from which this gas is ejected.
- a screen 7 mounted, for example glued, on the table 3 protects, when the operating temperature ⁇ f is reached, the sensors 2 from all parasitic radiation.
- the assembly is isolated by vacuum or a neutral gas in a cryostat not shown.
- the screen 3 mounted integral with the table, initially at the same temperature ⁇ o as the table, cools later and more slowly according to a Le law, because of the fact that its cooling is ensured by thermal conduction through the mass of the table and therefore depends on its thermal inertia, which causes thermal drag ⁇ .
- the detector 10 here consists of sensors 20 mounted on the table 30 cooled by a cooler 41 and on which is mounted a screen 70 itself cooled by a cooler 42 comprising an annular duct 43 around the screen 70 which channels the convection on the screen.
- the wall of the duct 43 constitutes a cold wall and that the assembly is arranged inside a hot wall envelope comprising an inlet filter.
- the power supplies of the coolers can come from the same source 44, thus ensuring even better the concomitance of the cooling of the table and the screen.
- the circular table 50 on which the sensors 66 are mounted, is cooled by a well 51 which is connected to the table by a frustoconical portion 52.
- the table On two peripheral sectors 53, 54, diametrically opposite, the table is pierced with two pluralities of orifices or vents, 55, 56 for the passage of the cooling flow.
- the two sectors for the passage of the convection flow are offset by 90 ° with respect to two other diametrically opposed sectors 57, 58 through which run tracks 59, 60 of the detector's electrical outputs, arranged in an internal layer under the 'screen, and connected to an image processing electronics.
- the screen 80 consists of a cylindrical envelope 61, 62 inside which extends an annular cavity 63 communicating with the passage orifices 55, 56.
- An annular rim 64 partially closes the space 65 inside the internal envelope 62 of the screen 80, the central opening of the rim being able to be closed by an optical filter.
- the two envelopes 61, 62 of the screen here consist of a thin wall of conductive metal (copper / nickel for example).
- the envelopes 61, 62 are here fixed to the table 50 by gluing.
- the cold table 50 is here made up of several layers of ceramic material with high conductivity, the coefficient of expansion of which is compatible with the detector.
- the cooling cavity is integrated into the cold table and produced by machining.
- this cavity is split into two lobes. In this case, the electrical output tracks would then be reported separately to the outside, as would the screen.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Radiation Pyrometers (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0116863 | 2001-12-26 | ||
FR0116863A FR2834127B1 (fr) | 2001-12-26 | 2001-12-26 | Photodetecteur refroidi |
PCT/FR2002/004528 WO2003056632A1 (fr) | 2001-12-26 | 2002-12-23 | Photodetecteur refroidi |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1468455A1 true EP1468455A1 (fr) | 2004-10-20 |
Family
ID=8870985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02805805A Withdrawn EP1468455A1 (fr) | 2001-12-26 | 2002-12-23 | Photodetecteur refroidi |
Country Status (6)
Country | Link |
---|---|
US (1) | US7253396B2 (fr) |
EP (1) | EP1468455A1 (fr) |
AU (1) | AU2002365024A1 (fr) |
FR (1) | FR2834127B1 (fr) |
IL (2) | IL162672A0 (fr) |
WO (1) | WO2003056632A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8637824B2 (en) * | 2011-01-20 | 2014-01-28 | Raytheon Company | Cold shield for a cold stage |
US20140110579A1 (en) * | 2012-10-23 | 2014-04-24 | Advanced Measurement Technology Inc. | Handheld Spectrometer |
US9234693B2 (en) | 2012-11-02 | 2016-01-12 | L-3 Communications Cincinnati Electronics Corporation | Cryogenic cooling apparatuses and systems |
US11079281B2 (en) * | 2019-01-17 | 2021-08-03 | Uvia Group Llc | Cold stage actuation of optical elements including an optical light shield and a lenslet array connected to a cold finger |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2541818C3 (de) * | 1975-09-19 | 1981-09-10 | Bodenseewerk Gerätetechnik GmbH, 7770 Überlingen | Infrarot-Strahlungsdetektor für Zielsuchköpfe |
EP0213421A3 (fr) * | 1985-08-07 | 1989-02-22 | Honeywell Inc. | Détecteur infrarouge comprenant des cavités sous vide |
GB2186740B (en) * | 1986-02-14 | 1989-11-08 | Philips Electronic Associated | Infrared detectors |
JPS6370127A (ja) * | 1986-09-11 | 1988-03-30 | Nec Corp | 冷却型赤外線検知器 |
DE3823006C2 (de) * | 1988-07-07 | 1994-09-08 | Licentia Gmbh | Gehäuse für infrarotempfindliche Bauelemente |
FR2638023B1 (fr) * | 1988-10-13 | 1992-07-31 | Telecommunications Sa | Dispositif cryostatique pour detecteur de rayonnements |
US5382797A (en) * | 1990-12-21 | 1995-01-17 | Santa Barbara Research Center | Fast cooldown cryostat for large infrared focal plane arrays |
FR2671230B1 (fr) * | 1990-12-28 | 1993-04-16 | Telecommunications Sa | Doigt de refroidissement d'un circuit semi-conducteur et dispositif cryogenique pourvu d'un tel doigt. |
US5598711A (en) * | 1995-12-20 | 1997-02-04 | Lockheed Martin Corporation | Fluid deflection method using a skirt |
IL132035A0 (en) * | 1999-09-23 | 2001-03-19 | Israel State | Infrared detector |
-
2001
- 2001-12-26 FR FR0116863A patent/FR2834127B1/fr not_active Expired - Fee Related
-
2002
- 2002-12-23 US US10/499,960 patent/US7253396B2/en not_active Expired - Fee Related
- 2002-12-23 AU AU2002365024A patent/AU2002365024A1/en not_active Abandoned
- 2002-12-23 IL IL16267202A patent/IL162672A0/xx unknown
- 2002-12-23 WO PCT/FR2002/004528 patent/WO2003056632A1/fr not_active Application Discontinuation
- 2002-12-23 EP EP02805805A patent/EP1468455A1/fr not_active Withdrawn
-
2004
- 2004-06-22 IL IL162672A patent/IL162672A/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO03056632A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2003056632A1 (fr) | 2003-07-10 |
IL162672A (en) | 2009-08-03 |
AU2002365024A1 (en) | 2003-07-15 |
FR2834127B1 (fr) | 2005-01-14 |
US20050218316A1 (en) | 2005-10-06 |
IL162672A0 (en) | 2005-11-20 |
US7253396B2 (en) | 2007-08-07 |
FR2834127A1 (fr) | 2003-06-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0614059B1 (fr) | Refroidisseur muni d'un doigt froid du type tube pulsé | |
EP1532428A1 (fr) | Capteur degivre de temperature totale d air | |
FR2925254A1 (fr) | Dispositif de refroidissement d'une carte electronique par conduction a l'aide de caloducs,et procede de fabrication correspondant. | |
EP1630531B1 (fr) | Composant de détection de rayonnements électromagnétiques, et notamment infrarouge, bloc optique d'imagerie infrarouge intégrant un tel composant et procédé pour sa réalisation | |
EP1468455A1 (fr) | Photodetecteur refroidi | |
EP0388277B1 (fr) | Refroidisseur Joule-Thomson | |
FR2776762A1 (fr) | Dispositif de liaison thermique pour machine cryogenique | |
FR2630050A1 (fr) | Vehicule ayant un systeme de conditionnement d'air et un systeme de refroidissement de boissons integres | |
FR3052245B1 (fr) | Dispositif cryogenique a echangeur compact | |
FR2914050A1 (fr) | Refrigerateur a basse ou tres basse temperature et procede de refrigeration | |
EP0493208B1 (fr) | Doigt de refroidissement d'un circuit semi-conducteur et dispositif cryogénique pourvu d'un tel doigt | |
FR3082562A1 (fr) | Anneau de commande de portes de decharge pour une turbomachine d'aeronef et turbomachine le comportant | |
EP0258093B1 (fr) | Réfroidisseur Joule-Thomson et crystat comprenant ce réfroidisseur | |
EP3814694B1 (fr) | Pièce pour refroidisseur joule-thomson et procédé de fabrication d'une telle pièce | |
FR2500581A1 (fr) | Refroidisseur cryogenique a liaison thermique perfectionnee | |
EP3217137A1 (fr) | Dispositif de refroidissement thermique d'un objet à partir d'une source froide telle qu'un bain de fluide cryogénique | |
EP1489665B1 (fr) | Photodétecteur refroidi | |
EP0177416A1 (fr) | Dispositif cryostatique pour détecteurs de rayonnements | |
EP2032933A1 (fr) | Interrupteur thermique a gaz a element d'echange thermique mobile | |
FR2723435A1 (fr) | Systeme de refroidisseur cryogenique a bout froid soude | |
EP0285491B1 (fr) | Refroidisseur cryogénique | |
FR3083034A1 (fr) | Machine tournante supraconductrice | |
FR2883365A1 (fr) | Appareil de refroidissement cryogenique pour un autodirecteur de projectile autoguide | |
FR3097077A1 (fr) | Module électronique | |
FR2682178A1 (fr) | Appareil de froidissement par cryogenie. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20040726 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SAGEM DEFENSE SECURITE |
|
17Q | First examination report despatched |
Effective date: 20100226 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20150908 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20160119 |