Optics: image projectors – Reflector
Reexamination Certificate
2007-02-27
2007-02-27
Dowling, William C. (Department: 2851)
Optics: image projectors
Reflector
C385S901000, C353S122000
Reexamination Certificate
active
10855314
ABSTRACT:
A projection type display apparatus comprises a rod type integrator6having a solid rod structure, in which light being emitted from a lamp and entering an entrance face6a, as a focal plane, at one end of the solid rod is guided by being internally reflected therein, and is emitted from an exit face6cas a further focal plane at the other end of the solid rod. A parallel glass plate is attached to the exit face6c. The glass plate11has a flange-shaped extension portion11a, which extends from periphery of the solid rod, and which serves as a holding portion for holding the integrator. This realizes little or no loss of light to be caused by light leakage outside the solid rod, thereby preventing the integrator from decreasing light use efficiency. Furthermore, the exit face6c, as the further focal plane, of the solid rod is prevented from having e.g. dust deposited thereon, thereby causing no influence on deterioration of projected images. Parallel glass plates11made of a material having a coefficient of line thermal expansion similar to that of the solid rod can be attached to the entrance face6aas the focal plane and the exit face6cas the further focal plane, respectively, of the solid rod.
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Partial English translation of Japanese Office Action dated Sep. 6, 2006 (Two (2) pages).
Crowell & Moring LLP
Dowling William C.
Funai Electric Co. Ltd.
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