Variable focal length camera

Details Variable focal length camera Variable focal length camera

1987-06-05

1988-09-13

Griffin, Donald A.

354288, G03B 300, G03B 1702

Patent

active

047713038

ABSTRACT:
The present invention provides a bifocal camera capable of changing focal length of a photographic lens system and having lens drive means operable by a motor to switch the photographic lens system between a first focal length state wherein a main lens component is located at a rear position and a second focal length state wherein the main lens component is located at a front position and an auxiliary lens component is located at an operative position. This camera comprises a device for automatically stopping the motor when shifting of the main lens component is interrupted by force, and a device for restricting the shifting of the main lens component between the front position and the rear position. The auxiliary lens component is moved and a lens barrier is opened and closed in interlocked relationship with the shifting of the main lens component.

REFERENCES:
patent: 4204760 (1980-05-01), Kobayashi
patent: 4451129 (1984-05-01), Ikari et al.
patent: 4525050 (1985-06-01), Ohashi

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