Television cameras

Details Television cameras Television cameras

1981-12-03

1984-01-24

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358225, H04N 326

Patent

active

044279965

ABSTRACT:
A television camera comprises a pick-up element, an iris, a variable gain amplifier for a picked-up signal, and first and second comparators to compare the video level of the picked-up signal to be supplied to a pick-up signal system following the variable gain amplifier with first and second reference levels and respectively supply first and second compared output signals therefrom to the iris and to the variable gain amplifier for controlling them thereby to form first and second automatic control loops, whereby when the amount of light incident on said pick-up element is above a predetermined value, the first automatic control loop is actuated and when it is below the predetermined value, the second automatic control loop is actuated.

REFERENCES:
patent: 3555181 (1971-01-01), Thommen
patent: 4174526 (1979-11-01), Geurts
patent: 4268866 (1981-05-01), Rodgers
patent: 4300167 (1981-11-01), Miller
patent: 4365272 (1982-12-01), Nagai

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