Continuous depth of focus control

Details Continuous depth of focus control Continuous depth of focus control

1985-02-19

1985-07-30

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358227, H04N 526

Patent

active

045325537

ABSTRACT:
In a television camera, the variable gain control is adjusted to provide a corresponding change in the camera output video signal level. The iris control simultaneously is changed to maintain the preset video signal level. This varies the iris setting and provides a corresponding change in the depth of focus to allow focussing on different objects in a scene.

REFERENCES:
patent: 4268866 (1981-05-01), Rodgers, III
patent: 4300167 (1981-11-01), Miller
patent: 4301478 (1981-11-01), Sakane
patent: 4365272 (1982-12-01), Nagai
patent: 4396951 (1983-08-01), Tanaka

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