Automatic focusing control device

Details Automatic focusing control device Automatic focusing control device

1981-02-17

1982-10-12

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 526

Patent

active

043542042

ABSTRACT:
An automatic focusing control system used for a television camera is disclosed. The control system comprises an optical system, means for modulating a focal length by a modulating signal, means for sensing an output signal corresponding to the focal length from an image signal obtained from the modulating means, means for sensing a focusing error signal from the output signal and the modulating signal, and means for controlling or adjusting the focal length and superimposing the error signal upon the modulating signal.

REFERENCES:
patent: 3617633 (1971-11-01), Barr et al.

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