Focus state detection apparatus and optical instrument

Details Focus state detection apparatus and optical instrument Focus state detection apparatus and optical instrument

2009-03-18

2010-06-08

Koval, Melissa J (Department: 2862)

Photography

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

Having accumulation photoarray and time control means

C348S345000

Reexamination Certificate

active

07734164

ABSTRACT:
A focus state detection apparatus has a sensor that senses light rays that pass through a lens subjected to focus detection and is composed of a plurality of photoelectric converter elements, a charge accumulation unit that accumulates pixel signals obtained by the sensor, a first accumulation controller, a second accumulation controller, a first storage unit that stores each accumulated signal of each of the plurality of areas accumulation-controlled by the first accumulation controller, a second storage unit that stores the accumulated signal of the combined area accumulation-controlled by the second accumulation controller, and a defocus state detector that detects a defocus state of the area from the accumulated signal stored in either the first storage unit or the second storage unit.

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patent: 2001/0014215 (2001-08-01), Ide et al.
patent: 2004/0008983 (2004-01-01), Kanemitsu
patent: 2004/0165878 (2004-08-01), Nakata
patent: 63-172206 (1988-07-01), None
patent: 9-54242 (1997-02-01), None
patent: 2003-215442 (2003-07-01), None

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