Photographic camera with automatic focussing system

Details Photographic camera with automatic focussing system Photographic camera with automatic focussing system

1979-03-13

1981-05-05

Hix, L. T.

Optics: motion pictures

Removable film strip magazine type

352140, 354 25, G03B 300, G03B 708

Patent

active

042655285

ABSTRACT:
Upon termination of shooting, the exposure objective of a still or motion-picture camera is automatically returned to a predetermined starting position, such as at the middle of the available range of distance-settings. If the camera's focussing system is fully automatic, this is preferably achieved by overriding normal operation of the focussing system by a command signal indicating that the objective is to be brought to starting position and substituted for the normal-operation command signal generated in dependence upon physically measured camera-to-subject distance. If the normal-operation command signal of the system is manually selected, as in the case of a closed-loop positioning system wherein the command transducer is manually adjusted, or as in the case of an open-loop positioning system in which the actuating signal of the system is manually established, the signal commanding or actuating a return to starting setting is likewise substituted for the normal-operation command or actuating signal.

REFERENCES:
patent: 3886567 (1975-05-01), Matsumoto et al.

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