Photography – With exposure objective focusing means – focusing aid – or... – Optical detail with photoelement system
Reexamination Certificate
2008-05-07
2010-10-19
Fuller, Rodney E (Department: 2862)
Photography
With exposure objective focusing means, focusing aid, or...
Optical detail with photoelement system
C396S111000
Reexamination Certificate
active
07817912
ABSTRACT:
An optical system of a focus detection apparatus includes a condenser lens positioned behind an expected focal plane of a photographing lens; an auxiliary lens group positioned behind the condenser lens to be coaxial therewith; and a pair of separator lenses positioned behind the auxiliary lens group in close vicinity thereof and integrally molded from resin. An object image formed on the expected focal plane is divided into two images by the pair of separator lenses to be reformed on a pair of areas on a sensor, respectively, and the auxiliary lens group includes a negative lens element made of resin, and a positive lens element made of glass.
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Fuller Rodney E
Greenblum & Bernstein P.L.C.
Hoya Corporation
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