Light collecting device for use in a projection apparatus

Details Light collecting device for use in a projection apparatus Light collecting device for use in a projection apparatus

2007-11-26

2009-12-29

Spector, David N (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

C359S636000, C353S081000

Reexamination Certificate

active

07639427

ABSTRACT:
A light collecting device adapted for a projection apparatus is provided. The light collecting device at least comprises a light collecting rod that has a body, a longitudinal direction, an incident end, and an emergent end. The incident end comprises an incident surface and a reflecting surface, in which the incident surface is adjacent to the reflecting surface to form an included angle therebetween. The emergent end is opposite to the incident end. Thus, a first light beam passes through the incident surface of the incident end and travels along the body of the light collecting rod towards the emergent end along the longitudinal direction when a second light beam enters into the body of the light collecting rod. The second light beam is reflected by the reflecting surface of the incident end towards the emergent end along the longitudinal direction.

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Chinese Office Action dated Jun. 5, 2009 issued in related Chinese Patent Application No. 200710141328.

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