[특허]Joule-Thomson cryostat cooled infrared cell having a built-in thermostat sensing element

Joule-Thomson cryostat cooled infrared cell having a built-in thermostat sensing element 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01J-001/00
출원번호	US-0548797 (1966-05-09)
발명자 / 주소	Peterson Eugene W. (Santa Barbara CA) Wurtz Jr. Howard P. (Santa Barbara CA) Winner Marvin R. (Goleta CA)
출원인 / 주소	The United States of America as represented by the Secretary of the Navy (Washington DC 06)
인용정보	피인용 횟수 : 25 인용 특허 : 0

초록 ▼

A cryogenically cooled infra-red detection cell assembly comprises a Dewar-flask type of thermal insulation casing. The closed end of the Dewar casing is the front end of the assembly and is adapted to have a lead sulfide infra-red transducer mounted on the inside face of the casing inner end wall, and to have the casing outer end wall form a part of a lens system for focusing on the transducer. A Joule-Thomson cryostat projects into the casing so as to maintain liquid nitrogen adjacent the outside face of the inner end wall. A mass of absorbent packing is placed in the Dewar casing adjacent its closed end, just ahead of the cold end of the cryostat to retain the liquid nitrogen there. The cold end of the cryostat is mounted to a metal mandrel, with the rear end of the mandrel serving as a mount for a small piece of gold-doped germanium. This piece of doped germanium acts as a variable resistance at the critical range of temperature control for the front end of the cryostat, and is operatively connected to a thermostat circuit which actuates the valve controlling the flow of gas into the cryostat. The electrical connections to the lead sulfide transducer consist of conductive strips which extend rearwardly along the inside surface of the inner lateral wall of the Dewar casing. Shieldings to prevent microphonics due to casing vibration, and microphonics due to gas motion in the cryostat, are deposited on the surfaces of the lateral walls of the Dewar casing.

대표청구항 ▼

A cryogenic infrared energy sensing unit having a built-in Joule-Thomson cryogenic cooler of the type utilizing exhaust refrigerant gas to regeneratively cool the refrigerant supply line and having a built-in thermostat sensing element for providing an electrical signal to control operation of the cooler, in combination, comprising, a. a double walled, Dewar type thermal insulation casing having a closed and an open end, the interior of the casing forming an elongated central cryostat chamber, the closed end of the thermal insulation casing forming the front end of the unit and containing an infrared sensor element affixed to the interior surface of the inner wall of the double walled casing, the outer wall of the casing at the front end being formed of an infrared energy window material, b. a cryostat assembly shaped for insertion in the cryostat chamber and adapted to cool the exterior surface of the inner wall of the double walled casing at the front end, said cryostat assembly comprising a two-piece mandrel consisting of a rear thin walled tubular member and metallic heat exchange front end tip member plugging the front end of the tabular member, and a refrigerant supply tube helically wrapped around the two-piece mandrel terminating at its forward direction with an open end to form the gas expansion nozzle to provide the Joule-Thomson cooling effect, the construction being such that the helically coiled refrigerant is supported between the tubular member of the two-piece mandrel and the wall of the cryostat chamber in a manner permitting counterflow of the exhaust gases from the front to rear end of the cryostat chamber about the helical tubing in the annular space between the mandrel and the lateral wall of the cryostat chamber, c. a temperature responsive variable impedance element made of an impurity doped semi-conductor material which intrinsically exhibits temperature sensitive characteristics at the cryogenic temperature region desired for operation of the infrared sensor element, said variable impedance element being disposed in the interior of the tubular mandrel element and affixed by one of its sides to rear face of the heat exchange front end tip member, and d. means forming a pair of output connections across the variable impedance element and accessible from the exterior of the unit.

이 특허를 인용한 특허 (25)

Longsworth Ralph C. (Allentown PA), Apparatus for condensing liquid cryogen boil-off.
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Harting Dietmar,DEX ; Muller Wulf,DEX ; Ciezarek Marek,DEX, Casing for housing electrical and/or electronic components.
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Kline Mark L. (Fullerton CA) Ross Oakley G. (Paso Robles CA), Clear aperture cryostat for an infrared detector.
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Ellison Woodrow R. ; Kohuth Kerry R. ; Craghead Michael E., Commandably actuated cryostat.
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Simmonds, Michael Bancroft; Diederichs, Jost, Cryocooler-based gas scrubber.
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Kindlein,Johann, Cryogenic x-ray source device.
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Littrup, Peter J.; Babkin, Alexei V.; Duncan, Robert V.; Kerkar, Pramod; Boldarev, Sergey T., Cryotherapy probe.
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Littrup, Peter J.; Babkin, Alexei V.; Duncan, Robert V.; Kerkar, Pramod; Boldarev, Sergey T., Cryotherapy probe.
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Littrup,Peter J.; Babkin,Alexei V.; Duncan,Robert V.; Kerkar,Pramod; Boldarev,Sergey T., Cryotherapy probe.
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Littrup,Peter J.; Babkin,Alexei V.; Duncan,Robert; Boldarev,Sergey, Cryotherapy system.
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Littrup,Peter J.; Babkin,Alexei V.; Duncan,Robert; Boldarov,Sergei, Cryotherapy system.
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Guy Eric C. (Fordingbridge GB2), Detectors, and envelope arrangements and mounts for detectors.
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Boss Harold O. (Corona Del Mar CA), Electrostatic shield for cryostat dewar.
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Katagiri Masaki (Ibaraki JPX), Gas-cooled semiconductor radiation detector.
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Steyert William A. (Center Valley PA) Longsworth Ralph C. (Allentown PA), Heat exchanger for a fast cooldown cryostat.
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Wakabayashi Satoshi (Kamakura JPX) Nonoyama Tohru (Kamakura JPX) Tajime Toru (Kamakura JPX), Infrared detector comprising an evacuated and cooled Dewar having an elliptical spheroid end window.
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Lillquist Robert D. (Schenectady NY) Menzies Richard G. (Wyoming OH) Lober Richard W. (Cincinnati OH), Infrared sensor for the control of plasma-jet spray coating and electric are heating processes.
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Dynes Robert C. (Summit NJ) Mochel John M. (Champaign IL), Metal-semiconductor thermal sensor.
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Littrup, Peter J.; Babkin, Alexei V.; Duncan, Robert; Boldarev, Sergey, Methods and systems for cryogenic cooling.
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Littrup,Peter J.; Babkin,Alexei V.; Duncan,Robert; Boldarev,Sergey, Methods and systems for cryogenic cooling.
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Robillard Gene A. (Stoneham MA), Photodetector mounting and connecting.
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Becherer, Frank; Thomas, Arnold, Radiometric measuring arrangement.
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Veprik, Alexander, Ruggedized dewar unit for integrated Dewar detector assembly.
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Kojima Masaya (Katsuta JPX) Minakawa Sadao (Mito JPX), Spectrophotometer with near infrared radiation sensor having an improved sensitivity.
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Hsu Ike C. (Los Altos CA) Ambrose Jay H. (Los Gatos CA), Stacked multistage Joule-Thomson cryostat.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Joule-Thomson cryostat cooled infrared cell having a built-in thermostat sensing element 원문보기

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Joule-Thomson cryostat cooled infrared cell having a built-in thermostat sensing element 원문보기

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