Illuminating optical unit in image display unit, and image...

Details Illuminating optical unit in image display unit, and image... Illuminating optical unit in image display unit, and image...

2005-05-24

2005-05-24

Ben, Loha (Department: 2873)

Optical: systems and elements

Optical modulator

C359S238000, C359S246000, C359S277000, C359S279000, C359S290000, C359S569000, C385S146000, C345S007000, C372S009000, C372S103000, C372S107000, C353S031000, C355S053000

Reexamination Certificate

active

06897992

ABSTRACT:
Disclosed is an illuminating optical unit in an image display unit for displaying an image by irradiating a GLV (spatial modulation device) with a laser beam and modulating the laser beam based on an image signal inputted to the GLV, which includes a polarized light rotation means for equally dividing a polarized light component of the laser beam into a P polarized light component and an S polarized light component, a polarized light beam splitter for separating from each other the P polarized light component and the S polarized light component equally divided by the polarized light rotation means, and an optical path difference generation means for generating an optical path difference not less than the coherence length of the laser beam between the laser beam of the P polarized light component and the laser beam of the S polarized light component.

REFERENCES:
patent: 4521075 (1985-06-01), Obenschain et al.
patent: 4744615 (1988-05-01), Fan et al.
patent: 5224200 (1993-06-01), Rasmussen et al.
patent: 5272473 (1993-12-01), Thompson et al.
patent: 6577429 (2003-06-01), Kurtz et al.
patent: 6594090 (2003-07-01), Kruschwitz et al.

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