Television camera apparatus having automatic gain-selecting unit

Details Television camera apparatus having automatic gain-selecting unit Television camera apparatus having automatic gain-selecting unit

1981-01-22

1982-12-21

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 526

Patent

active

043652727

ABSTRACT:
A television camera is provided with an automatic gain selecting unit which is responsive to the iris value of the lens attached to the camera. The automatic gain selecting unit includes a comparator for determining when the camera lens-iris operates within a medium "window" range, a counter for counting upwardly or downwardly when the lens-iris operates outside of the window range, and a decoder for outputting a control signal to a gain selecting amplifier to adjust the gain thereof, in response to the operation of the counter.

REFERENCES:
patent: 3518371 (1970-06-01), Brooks
patent: 3555181 (1971-01-01), Thommen
patent: 4050085 (1977-09-01), Prince
patent: 4174526 (1979-11-01), Geurts
patent: 4268866 (1981-05-01), Rodgers
patent: 4300167 (1981-11-01), Miller
patent: 4318132 (1982-03-01), Machida

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