Detector array fixed-pattern noise compensation

Details Detector array fixed-pattern noise compensation Detector array fixed-pattern noise compensation

1974-02-25

1976-04-06

Richardson, Robert L.

Telegraphy

Systems

Simplex-reversing periodic

178DIG12, H04N 530, H04N 521

Patent

active

039491625

ABSTRACT:
Fixed pattern noise compensation is provided for an array of detectors by premeasuring output signals of the detectors under a low (preferably at virtually absolute zero) level of uniform incident energy, converting the measured signal level of each detector to digital signals, and storing the digital signals in a memory for reading out in synchronism with scanning outputs of the detectors during normal system operation. The digital compensation signals are converted to analog form and subtracted from the output signals of the respective detectors during each successive scan cycle of the system operation. To eliminate error from random noise, several noise measurements may be averaged to produce the fixed pattern noise compensation signals.

REFERENCES:
patent: 3584146 (1971-06-01), Catt et al.
patent: 3629499 (1971-12-01), Carlson
patent: 3790705 (1974-02-01), Kamin
patent: 3800079 (1974-03-01), McNeil et al.
patent: 3814847 (1974-06-01), Longuet
patent: 3830972 (1974-08-01), Slverling et al.

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