Focus detecting device and method of operation

Details Focus detecting device and method of operation Focus detecting device and method of operation

1994-12-09

1996-06-25

Perkey, W. B.

G03B 1336

Patent

active

055305130

ABSTRACT:
A focus-detecting device for receiving light rays from a photographic field to detect a state of focus of a lens includes a sensor positioned to receive light rays from the photographic field. The sensor includes a plurality of sensor elements, at least one of the sensor elements being adjustably positionable independently of another of the sensor elements. A plurality of light-receiving components are coupled with the sensor elements to receive the light rays transmitted from the photographic field. The light-receiving components are grouped into a plurality of detectors coupled with one of the sensor elements to detect different areas in the photographic field to detect a state of focus of the lens. A method of use also is disclosed.

REFERENCES:
patent: 4387975 (1983-06-01), Anaki
patent: 4562345 (1985-12-01), Aoki et al.
patent: 4878079 (1989-10-01), Hamada et al.
patent: 5393969 (1995-02-01), Ohsawa

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