Infrared background suppression

Details Infrared background suppression Infrared background suppression

1976-11-08

1977-09-13

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250349, 250351, G01N 2300

Patent

active

040485005

ABSTRACT:
A system for eliminating background signals in chopped infrared measuring systems employs operational amplifier principles for subtracting a reference signal of proper amplitude, phase and frequency from the background-plus-signal radiation. The output is converted to a dc voltage level directly related to incident flux.

REFERENCES:
patent: 3144554 (1964-08-01), Whitney
patent: 3529152 (1970-09-01), Strange et al.
patent: 3631254 (1971-12-01), Covault
Technique for Background Elimination In Infrared Measurements; Moore, Rev. ci., Instrum., vol. 46, No. 12, Dec. 1975, pp. 1667-1669.

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