Projection type image display apparatus

Details Projection type image display apparatus Projection type image display apparatus

2006-03-30

2010-12-21

Ko, Tony (Department: 2878)

Optics: image projectors

Transparent plate

C353S074000, C353S099000, C353S122000

Reexamination Certificate

active

07854515

ABSTRACT:
An projection type image display apparatus includes a projection optical system having a plurality of concave mirrors and digital micromirror device (DMD). An optical path from the DMD to the concave mirror closest to the DMD is a sealed space which is surrounded by an image forming device holding plate holding the DMD, an optical component holding member holding the concave mirror and the image forming device holding plate, and a cover glass (transparent dust-proof cover) arranged on the optical path from the DMD to the concave mirror closest to the DMD.

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