Optics: image projectors – Particular condenser
Reexamination Certificate
2005-11-22
2005-11-22
Koval, Melissa J (Department: 2851)
Optics: image projectors
Particular condenser
C353S030000, C353S094000, C349S005000, C348S798000
Reexamination Certificate
active
06966658
ABSTRACT:
A small projection display apparatus which suppresses optical paths of incident and output light in a reflection valve from overlapping; and a rear projector and a multi-vision system using the same. The projection display apparatus includes an illumination optical system for collecting light radiated, forming illumination light, a reflection type light valve for reflecting the illumination light to output modulated light forming an optical image, a projection lens system for projecting an optical image formed by the reflection type light valve, and a lens element. The lens element is composed of one plano-convex lens, and is placed between the valve and the projection lens system with a convex surface directed to the projection lens system. The illumination light passes through the lens element to illuminate the reflection type light valve, and the modulated light output passes through the lens to be incident upon the projection lens system.
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Fushimi Yoshimasa
Masumoto Yoshihiro
Wada Mitsuhiro
Hamre Schumann Mueller & Larson P.C.
Koval Melissa J
Matsushita Electric - Industrial Co., Ltd.
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