Distance metering device and an optical apparatus provided with

Details Distance metering device and an optical apparatus provided with Distance metering device and an optical apparatus provided with

1997-12-23

1999-09-28

Perkey, W. B.

Photography

With exposure objective focusing means, focusing aid, or...

Reliability of focus/distance signal

396123, G03B 1336

Patent

active

059602198

ABSTRACT:
A distance metering device includes a pair of image sensors, and a pair of optical members. Each image sensor has a number of pixels arranged along a specified direction. There is provided a distance data calculator for defining a plurality of pairs of meter areas over pixels of the first and second image sensors, and calculating distance data concerning a distance to the object by performing a plurality of comparisons between image data from a pair of meter areas by shifting the pair of meter areas relative to each other a set number of pixels. A shift pixel number for a particular pair of meter areas having a smallest spatial parallax with respect to an optical axis of an optical system of a viewfinder is made to be different from that for the other pairs of meter areas.

REFERENCES:
patent: 4862204 (1989-08-01), Ishida et al.
patent: 5051767 (1991-09-01), Honma et al.
patent: 5805939 (1998-09-01), Hamamura et al.

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