Auto focusing light device

Details Auto focusing light device Auto focusing light device

1988-05-04

1989-02-14

Perkey, W. B.

3541451, 354418, G03B 300, G03B 1505

Patent

active

048049913

ABSTRACT:
An auto focusing light device detachably mounted on a camera has a plurality of photoelectric conversion elements arranged in a unidimensional direction and detects the focusing condition of a photographic lens in accordance with the output of the plurality of photoelectric conversion elements. The device comprises a plurality of light-emitting elements arranged in a unidimensional direction, and an optical projection system for projecting images of the plurality of light-emitting elements on an object in such a manner that the direction of arrangement of the images of the plurality of light-emitting elements is substantially perpendicular to the direction of arrangement of the plurality of photoelectric conversion elements.

REFERENCES:
patent: 3936187 (1976-02-01), Momose
patent: 4065778 (1977-12-01), Harvey
patent: 4575211 (1986-03-01), Matsumura
patent: 4688919 (1987-08-01), Ogawa et al.
patent: 4690538 (1987-09-01), Matsui et al.
patent: 4740806 (1988-04-01), Takehana

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