Automatic focus adjustment apparatus

Details Automatic focus adjustment apparatus Automatic focus adjustment apparatus

Filed on

1986-03-24

Date issued

1987-09-08

Examiner

Perkey, W. B.

Other Related Categories

G03B 300

Type

Patent

Status

active

Patent number

046920129

Description

ABSTRACT:
An automatic focus adjustment apparatus adapted for use with cameras includes an automatic focusing means for shifting an imaging objective for automatic focusing in response to an output signal from a pair of photo-detectors which receives light radiated from a light emitting element and then reflected from a subject to be photographed. The in-focus range in which the pair of photo-detector means is deemed to receive the substantially equal amount of light is enlarged when the amount of light received by the pair of photo-detector means is smaller than a predetermined amount of light.

REFERENCES:
patent: 4268137 (1981-05-01), Cocron et al.

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