Light measuring and distance measuring apparatus for camera

Details Light measuring and distance measuring apparatus for camera Light measuring and distance measuring apparatus for camera

Filed on

1989-05-15

Date issued

1990-11-27

Examiner

Perkey, W. B.

Other Related Categories

354410, 354430, G03B 1336, G03B 708

Type

Patent

Status

active

Patent number

049740059

Description

ABSTRACT:
A light measuring and distance measuring apparatus for a camera equipped with an automatic exposure control apparatus (AE) and an automatic focus adjustment apparatus (AF) is disclosed which, when it measures the distance to an object in order to bring the photographic lens into an in-focus condition, decides whether or not the distance to the object is changing, and if the change in the distance to the object is detected and thereby the object is determined to be a moving body, it releases the AE lock which has been set for fixing the exposure value based on the brightness data previously obtained by light measuring of the object and performs an exposure value calculation based on the latest brightness data of the moving object and thereby determines a suitable exposure value.

REFERENCES:
patent: 4769663 (1988-09-01), Yamaki et al.
patent: 4774401 (1988-09-01), Yamada et al.
patent: 4792820 (1988-12-01), Norita et al.

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