Signal processor for infrared camera

Details Signal processor for infrared camera Signal processor for infrared camera

1994-04-12

1997-01-07

Hannaher, Constantine

Radiant energy

Infrared-to-visible imaging

Including detector array

G01J 500

Patent

active

055919731

ABSTRACT:
An analog signal processor for use with an array of uncooled detectors. Each detector has an amplifier associated therewith and each amplifier provides gain. A first circuit (212, 294, 300, 220) is included for compensating for a DC offset of each detector/amplifier pair of the array. A second circuit (250, 294, 300) corrects for variations in the sensitivity of each detector/amplifier pair. As a result, the outputs each of the detector/amplifier pairs in response to a common input signal are equalized. In a specific implementation, additional circuits are included providing global automatic DC level control across the array (270, 280, 294, 300), global automatic gain control across the array (250, 262, 294, 300) and frame-to-frame offset adjustment (212, 230).

REFERENCES:
patent: 5083204 (1992-01-01), Heard et al.
patent: 5201582 (1993-04-01), Lesniak

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