Photography – Camera detail – Shutter
Reexamination Certificate
2011-08-23
2011-08-23
LaBalle, Clayton E (Department: 2862)
Photography
Camera detail
Shutter
C353S038000, C353S075000, C353S121000, C359S456000, C359S742000, C359S743000
Reexamination Certificate
active
08002482
ABSTRACT:
A transparent screen is constructed in such a way that a plurality of Fresnel prisms12deach of which is smaller than a plurality of Fresnel prisms12aand has a shape approximately similar to that of each of the plurality of Fresnel prisms12aare arranged in a sawtooth shape on a non-light incidence surface portion of a Fresnel lens12on a light incidence side to which any image light PB applied from a projector1is not applied directly because blocked by a Fresnel prism12aplaced frontwardly.
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Google Search.
U.S. Appl. No. 12/609,923, filed Oct. 30, 2009, Endo, et al.
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Endo Takao
Nakano Yuzo
Takeuchi Hayato
Butler Kevin
LaBalle Clayton E
Mitsubishi Electric Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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