Remote iris control for television cameras

Details Remote iris control for television cameras Remote iris control for television cameras

1978-09-21

1980-02-26

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358228, H04N 530

Patent

active

041908643

ABSTRACT:
The extreme up and down positions of an iris control generate special binary digital codes. There special codes when decoded cause an up-down counter to be responsive to clock pulses and corresponding count up or down. The output of the counter is converted to an analog voltage which in turn controls the position of a camera iris. The iris opening is changed at a constant ranging rate determined by the clock when the lever is in the extreme positions. When the lever is between these extreme positions the iris is no longer changing at a constant ranging rate but rather is directly selected by the position of the lever.

REFERENCES:
patent: 2898536 (1959-08-01), Musolf
patent: 3571495 (1971-03-01), Konings
patent: 4037254 (1977-07-01), Monahan

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