Photography – With exposure objective focusing means – focusing aid – or... – Having viewfinder
Reexamination Certificate
2005-09-06
2005-09-06
Gray, David M. (Department: 2851)
Photography
With exposure objective focusing means, focusing aid, or...
Having viewfinder
C396S296000, C396S354000, C396S386000
Reexamination Certificate
active
06941069
ABSTRACT:
A light-projecting device comprises an ocular optical system facing an emergent opening of a hollow pentagonal mirror. A superimpose-plate is provided in an incident opening of the hollow pentagonal mirror so that a subject image obtained through a photographing optical system is formed. The superimpose-plate is put on a focusing glass. A mark, indicated in a picture plane of the view finder, is formed on the superimpose-plate. A light source radiates an illumination light beam. A light-projecting prism reflects the illumination light beam toward the emergent opening. The light-projecting prism has a light-projecting plane. The light-projecting plane is located below the optical axis of the ocular optical system.
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Abe Tetsuya
Kaneko Hidefumi
Gray David M.
Greenblum & Bernstein P.L.C.
PENTAX Corporation
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