Optical: systems and elements – Projection screen – With reflector or additional screen
Reexamination Certificate
2009-10-30
2011-10-11
Laballe, Clayton E (Department: 2862)
Optical: systems and elements
Projection screen
With reflector or additional screen
C359S452000, C359S589000
Reexamination Certificate
active
08035894
ABSTRACT:
A Fresnel lens screen20is comprised of a light entering surface partial total reflection type Fresnel lens24, a first light diffusing part26disposed behind the Fresnel lens, and a first base25. An image display element30disposed behind the Fresnel lens screen20has a lens element31, a second base32, and a third base35. Second light diffusing parts33are disposed behind the second base32. Each of the second light diffusing parts33includes two types of particulates having different particle sizes which are distributed therein.
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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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