Illumination optical system, and image display apparatus and...

Details Illumination optical system, and image display apparatus and... Illumination optical system, and image display apparatus and...

2007-10-30

2007-10-30

Kim, Peter B. (Department: 2851)

Photocopying

Projection printing and copying cameras

Image transferred to or from curved surface

C355S071000, C355S053000

Reexamination Certificate

active

10225345

ABSTRACT:
The illumination optical system includes an illumination light source and a spatial light modulator having a plurality of elements which reflect incident light from the illumination light source to form outgoing light and which flexibly switch a deflecting direction of a principal ray of the outgoing light between at least two directions including a first deflecting direction and a second deflecting direction, wherein a first angle between an incident direction of a principal ray of the incident light and the first deflecting direction is set to be approximately equal to a second angle between the first deflecting direction and the second deflecting direction and/or the first and second deflecting directions of the principal ray of the outgoing light inclines with reference to a normal line to an element array surface of the spatial light modulator. The image display apparatus and the image exposure apparatus have the above illumination optical system.

REFERENCES:
patent: 5870176 (1999-02-01), Sweatt et al.
patent: 6238852 (2001-05-01), Klosner
patent: 6379867 (2002-04-01), Mei et al.
patent: 6552779 (2003-04-01), Mei
patent: 6687041 (2004-02-01), Sandstrom
patent: 2002/0118375 (2002-08-01), Ramanujan et al.
patent: 2002/0171816 (2002-11-01), Markle
patent: 2003/0086177 (2003-05-01), Kowarz et al.

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