Focusing lens control apparatus with automatic and manual focus

Details Focusing lens control apparatus with automatic and manual focus Focusing lens control apparatus with automatic and manual focus

1996-05-02

1997-10-07

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359697, 359698, G02B 1514

Patent

active

056754418

ABSTRACT:
A lens control apparatus has an electric motor connected to a focusing lens to drive the focusing lens, an automatic focus adjustment device which supplies electrical power to the motor to operate the motor electrically to drive the focusing lens in an automatic focus adjustment mode, and a manual operation device which operates the motor mechanically to drive the focusing lens in a manual focus adjustment mode. A control device stops supplying of electrical power to the motor when the manual operation device is operated.

REFERENCES:
patent: 4461544 (1984-07-01), Isobe
patent: 4780738 (1988-10-01), Fukahori
patent: 4796045 (1989-01-01), Hamanishi et al.
patent: 5146071 (1992-09-01), Ookubo
patent: 5164860 (1992-11-01), Suzuki
patent: 5239417 (1993-08-01), Eguchi
patent: 5420721 (1995-05-01), Kanno
patent: 5521671 (1996-05-01), Aoki

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