Photography – With exposure objective focusing means – focusing aid – or... – Optical detail with photoelement system
Reexamination Certificate
2005-04-08
2008-12-30
Fuller, Rodney E (Department: 2862)
Photography
With exposure objective focusing means, focusing aid, or...
Optical detail with photoelement system
C348S349000
Reexamination Certificate
active
07471889
ABSTRACT:
A focus detection system including a sensor unit including a plurality of photoelectric conversion elements and a focus detection unit for performing focus adjustment using a pair of signals output from the sensor unit. In the sensor unit, an aperture corresponding to each of the photoelectric conversion elements positioned in the outer area is smaller than an aperture corresponding to each of the photoelectric conversion elements positioned in the central area. In the focus detection unit, the pair of signals is formed by pencils of rays passing through different regions of an exit pupil of an imaging lens.
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Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Fuller Rodney E
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