Joule-Thomson cryostat having a chemically-deposited infrared de

Details Joule-Thomson cryostat having a chemically-deposited infrared de Joule-Thomson cryostat having a chemically-deposited infrared de

1986-01-17

1987-07-21

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

62514IT, 250370, 357 83, G01J 504, H01L 2334

Patent

active

046820329

ABSTRACT:
An infrared photodetector is disclosed which is deposited directly onto a Joule-Thomson cryostat. The cryostat includes an elongated body having gas-carrying channels contained therein. The photodetector is deposited directly onto one end of the elongated body to form a direct thermal path between the detector and cryostat, thereby eliminating the need for any intermediate thermal bridge such as a mechanical bond, thermal conductive paste or epoxy. The direct contact between the photodetector material and the cryostat reduces the thermal mass of the structure to be cooled by the cryostat, thereby decreasing both the time and the quantity of gas required to cool the detector.

REFERENCES:
patent: 4321615 (1982-03-01), Blackman et al.
patent: 4386505 (1983-06-01), Little
patent: 4488414 (1984-12-01), Jungkman et al.
patent: 4591717 (1986-05-01), Scherber
patent: 4602158 (1986-07-01), Barrett
R. B. Schoolar, J. D. Jensen and G. M. Black, "Composition-Tuned PbS.sub.x 5e.sub.1-x Schottky-Barrier Infrared Detectors" Applied Physics Letters, vol. 31, No. 9, (Nov. 1977), pp. 620-622.
Robert M. Duboc, Jr., and Dr. Robert Wolfe, "Small Wonders: Microminiature Refrigerators for Cooling Detectors, Photonics Spectra (Jul. 1983).

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