Infrared detector comprising an evacuated and cooled Dewar havin

Details Infrared detector comprising an evacuated and cooled Dewar havin Infrared detector comprising an evacuated and cooled Dewar havin

1988-02-25

1990-06-26

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250353, 350276R, 350319, 350630, G01J 100, G02B 2700, G02B 500, G02B 700

Patent

active

049374508

ABSTRACT:
The evacuated and cooled Dewar 1 of an infrared detector has a window end in the shape of an elliptical spheroid, and an IR detection element 3 is mounted within the focal circle of the spheroid. The construction minimizes the sensing of spurious IR rays by the detection element, as well as the heat load for the coolant and the cool down time.

REFERENCES:
patent: 3006157 (1961-10-01), Haettinger et al.
patent: 3368078 (1968-02-01), Flint et al.
patent: 3942010 (1976-03-01), Peterson et al.
patent: 4178775 (1979-12-01), Smetana
patent: 4194119 (1980-03-01), MacKenzie
patent: 4420688 (1983-12-01), LeBars
patent: 4421985 (1983-12-01), Billingsley et al.
patent: 4507551 (1985-03-01), Howard et al.
patent: 4761556 (1988-08-01), Simpson et al.
Optical Design for the Infrared, by Robert E. Fischer, SPIE vol. 531 Geometrical Optics (1985) pp. 82-120.

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