Focus state detection device and method

Details Focus state detection device and method Focus state detection device and method

1995-06-12

1997-08-05

Metjahic, Safet

Photography

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

Plural focusing or rangefinding areas

396125, G03B 300

Patent

active

056547900

ABSTRACT:
A focus state detection device accurately detects in a short period of time the defocus amount of an arbitrary subject even when a plurality of subjects having different photographic distances are intermixed within the focus state detection region. Normally, the defocus amount is calculated on the basis of electric signal strings from each of a plurality of blocks. However, if one of the blocks is a perspective conflict block in which are intermixed a plurality of subjects having different photographic distances, new blocks are established containing at least part of the perspective conflict block. The defocus amount is calculated on the basis of the electric signal strings corresponding to these new blocks.

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