Automatic focus adjusting device

Details Automatic focus adjusting device Automatic focus adjusting device

1977-03-28

1978-06-06

Adams, Russell E.

Optics: motion pictures

With focus control

352 27, 354 25, G03B 300, G03B 708

Patent

active

040933652

ABSTRACT:
For use in a sound motion picture camera adapted to handle both sound and lent film and having a driven capstan at the sound station thereof, the capstan drive motor is used to power a driven component of an automatic focusing system by which a focusable objective lens can be focused automatically on a remote subject. By a control switch, associated with the camera operation control member, either manual or automatic focusing modes can be selected, the automatic mode being further selectable as being continuous during film transport operation or limited to a period before film transport operation begins.

REFERENCES:
patent: 3733989 (1973-05-01), Wick et al.
patent: 3849643 (1974-11-01), Takeda
patent: 3988747 (1976-10-01), Lermann et al.
patent: 4059756 (1977-11-01), Wilwerding
patent: 4059757 (1977-11-01), Wilwerding
patent: 4059758 (1977-11-01), Wilwerding

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