Optics: image projectors – Polarizer or interference filter
Reexamination Certificate
2005-09-13
2005-09-13
Mahoney, Christopher (Department: 2851)
Optics: image projectors
Polarizer or interference filter
C353S033000
Reexamination Certificate
active
06942345
ABSTRACT:
In a projection type image display apparatus, when the angle of light incident on the multi-layer film of a polarizing beam splitter for synthesizing an optical path becomes uneven, the loss of the light occurs. So, the projection type image display apparatus of the present invention is provided with an illuminating optical system1-5b, a color separating and synthesizing optical system7for separating illuminating light from the illuminating optical system into a plurality of color lights and making the respective color lights enter image display elements8r-8bprovided for the respective color lights, and synthesizing a plurality of image lights emerging from these image display elements, a projection optical system10for projecting and displaying the image lights synthesized by the color separating and synthesizing optical system, and polarizing elements Pr, Pg, Pb for transmitting only a particular polarized component light therethrough disposed between the color separating and synthesizing optical system and the image display elements.
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Abe Masayuki
Kodama Hiroyuki
Okuyama Atsushi
Otaka Keiji
Canon Kabushiki Kaisha
Mahoney Christopher
Morgan & Finnegan , LLP
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