Photography – With exposure objective focusing means – focusing aid – or... – Optical detail with photoelement system
Reexamination Certificate
2006-05-16
2006-05-16
Mahoney, Christopher (Department: 2851)
Photography
With exposure objective focusing means, focusing aid, or...
Optical detail with photoelement system
C396S152000
Reexamination Certificate
active
07046925
ABSTRACT:
A superimpose-plate is put on a focusing glass, on which a subject image obtained through the photographing optical system is formed. The superimpose-plate and the focusing glass are provided in an incident opening of a hollow pentagonal mirror. The superimpose-plate comprises a plurality of micro-prisms that are formed on the superimpose-plate. Each of the micro-prisms shows a triangle in a cross-section. The vertical angle of the triangle is identical in each of the micro-prisms. A ridgeline of each of the micro-prisms is parallel to the right-left direction of the picture plane of the view finder.
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Abe Tetsuya
Kabeta Atsuo
Kaneko Hidefumi
Sugiyama Akihiro
Greenblum & Bernstein P.L.C.
Mahoney Christopher
PENTAX Corporation
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