Automatic responsivity compensator in an IR imaging system

Details Automatic responsivity compensator in an IR imaging system Automatic responsivity compensator in an IR imaging system

1979-06-11

1980-09-30

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

250334, 250338, 358213, H04N 718

Patent

active

042258839

ABSTRACT:
An automatic responsivity compensator for correcting video output signals om a CCD multiplexer in a cryogenic dewar in IR imaging systems wherein the CCD multiplexer must operate with fixed gain inputs from a plurality of linear detector channels. The automatic responsivity compensator is comprised of a signal reference that is normalized with what the output voltage should be when looking at a fixed temperature source in the field of view of the detectors and which further provides a voltage reference for automatic gain adjustment for each detector channel to normalize and equalize the responsivity of the detectors. The automatic responsivity compensator may be either a feedback system as a direct gain control means of a controllable gain amplifier or may be a feedback system operating on the output from a constant gain amplifier wherein either feedback system equalizes the responsivity of the detectors.

REFERENCES:
patent: 3886359 (1975-05-01), Cheek
patent: 3971886 (1976-07-01), Chow
patent: 4032975 (1977-06-01), Malueg

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