Illumination optical apparatus and projection type display...

Details Illumination optical apparatus and projection type display... Illumination optical apparatus and projection type display...

2005-11-08

2009-06-02

Dowling, William C (Department: 2851)

Optics: image projectors

Unitary plural refracting surfaces

C353S101000, C362S283000

Reexamination Certificate

active

07540617

ABSTRACT:
An illumination optical apparatus and a projection type display apparatus capable of preventing an image on boundary lines of a fly-eye lens from deviating from a designed position and preventing unevenness of brightness is provided: wherein a first lens holding member holding said first fly-eye lens; a second lens holding member joined to said first lens holding member, and holding said second fly-eye lens; and a third lens holding member joined to said second lens holding member, and holding an optical lens are provided; and said first lens holding member and said second lens holding member are joined to be relatively rotatable about an optical axis.

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