Optics: image projectors – Polarizer or interference filter
Reexamination Certificate
2006-06-19
2010-02-23
Epps, Georgia Y (Department: 2878)
Optics: image projectors
Polarizer or interference filter
C353S084000
Reexamination Certificate
active
07665849
ABSTRACT:
A projection type video display apparatus having improved color separating ability is provided. The projection type video display apparatus includes a color separating unit including an entrance plate provided with an aperture through which light beams emitted by a light source travel, an optical integrator, and a plurality of dichroic mirrors disposed with their color separating surfaces extended substantially parallel to the exit surface of the optical integrator and capable of transmitting color light beams of wavelengths in a predetermined wavelength range and of reflecting color light beams of wavelengths outside the predetermined wavelength range.
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Office action dated Sep. 7, 2007 issued by the State Intellectual Property Office of China (SIPO) for SIPO patent application CN200610106312.
Adachi Kei
Hirata Koji
Ikeda Hidehiro
Yatsu Masahiko
Epps Georgia Y
Hitachi , Ltd.
Le Bao-Luan
Townsend and Townsend / and Crew LLP
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