Electromagnetic drive device for camera

Details Electromagnetic drive device for camera Electromagnetic drive device for camera

1983-04-06

1984-08-21

Gellner, Michael L.

354400, 354453, 354455, 3542711, 354274, G03B 302, G03B 7085

Patent

active

044667256

ABSTRACT:
An electromagnetic drive device for a camera includes two exciting coils which have the power supply thereto controllable independent of each other. The two exciting coils are disposed either on the inner or outer side of a lens barrel which carries a photo-taking lens. The direction of magnetic flux formed by each of these two exciting coils is shiftable either to the direction of the optical axis of the photo-taking lens or to a direction perpendicular to the optical axis by controlling the direction of the power supply to these two exciting coils. Shifting the photo-taking lens to an in-focus position and controlling the action of a light quantity control member disposed within the lens barrel can be accomplished independently.

REFERENCES:
patent: 4367931 (1983-01-01), Kawai et al.

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