Focusing control device

Details Focusing control device Focusing control device

1981-07-10

1983-06-21

Perkey, William B.

Optics: motion pictures

Removable film strip magazine type

352140, G03B 310

Patent

active

043891063

ABSTRACT:
A focusing control device for a cine camera operates to displace the lens so that the lens is automatically and continuously focused on an object. The focusing control device is provided with circuitry to prevent displacement of the lens caused by the detection of an infinite focus condition unless the lens is out of the focusing tolerance range and the lens is in a front focusing condition.

REFERENCES:
patent: 3999192 (1976-12-01), Hosoe et al.
patent: 4251145 (1981-02-01), Cocron et al.

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