Focusing device

Details Focusing device Focusing device

1984-04-03

1986-04-01

Adams, Russell E.

G03B 310

Patent

active

045794383

ABSTRACT:
A focusing device for focusing a photographic camera or the like on the image of an object to be photographed is arranged to control and adjust the operating time of each performance of a focus detecting process according to a signal produced from reflection light receiving means during a series of processes. These processes include projecting a light on the object, receiving a reflection light from the object, computing an extent of deviation of a photo-taking lens from an in-focus position on the basis of a signal produced from a light receiving device; and driving the lens to shift its position.

REFERENCES:
patent: 4065778 (1977-12-01), Harvey
patent: 4429965 (1984-02-01), Enomoto et al.
patent: 4473743 (1984-09-01), Ishikawa

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