Automatic focusing system for use in camera

Details Automatic focusing system for use in camera Automatic focusing system for use in camera

1978-10-24

1980-01-08

Gellner, Michael L.

G03B 310

Patent

active

041825551

ABSTRACT:
A camera employing an automatic focusing system has a movable objective lens which is automatically moved from an initial position to a properly focused position in accordance with a distance signal indicative of the distance between the camera and a target object to be photographed from a distance measuring element. The automatic focusing system includes a discriminator which discriminates whether the distance measuring element properly produces the distance signal or fails to produce such distance signal. The objective lens is moved only when the distance signal is properly produced or when a substitute signal is forcibly produced from a manual control unit for the substitution of the distance signal.

REFERENCES:
patent: 3442193 (1969-05-01), Pagel
patent: 3723003 (1973-03-01), Vockenhuber et al.
patent: 3945023 (1976-03-01), Stauffer

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