Artificial target for automatic gain normalization

Details Artificial target for automatic gain normalization Artificial target for automatic gain normalization

1988-01-14

1990-08-14

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2502521, 250332, 250334, 250349, 250351, H04N 533

Patent

active

049489640

ABSTRACT:
The disclosure relates to a system for on-line normalization of the outputs of all of the detector elements of an infrared detector wherein, during the retrace period of the scanning mirror, infrared energy from a controlled thermoelectric source is reflected first from a high reflectivity sector of a rotating mirror and then from a relatively low reflectivity sector of the rotating mirror onto the detector. The detector output for the high and low reflectivity input signals is analyzed on a channel by channel basis by software controlled hardware and the gain of each channel is then adjusted in response thereto by the software controlled hardware individually. In this manner, each channel is caused to provide the same output for an identical input thereto.

REFERENCES:
patent: 3576944 (1971-05-01), LaBaw
patent: 3895182 (1975-07-01), Trilling
patent: 3971886 (1976-07-01), Chow
patent: 4225883 (1980-09-01), Van Atta et al.
patent: 4712010 (1987-12-01), Alm

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