Illumination optical system and projection display optical...

Details Illumination optical system and projection display optical... Illumination optical system and projection display optical...

2007-06-19

2007-06-19

Perkey, W. B. (Department: 2851)

Optics: image projectors

Polarizer or interference filter

C353S038000, C353S102000, C348S750000, C348S758000, C348S759000, C349S009000, C359S490020, C359S490020, C359S619000

Reexamination Certificate

active

11357906

ABSTRACT:
An illumination optical system is disclosed, which provides a luminous flux with a small incident angle on an illumination surface in one axis direction on a section of the luminous flux. The illumination optical system can suppress a reduction in light amount by a mask provided for a polarization conversion element. The illumination optical system has a light source and an optical integrator. The optical integrator uses a lens array to perform splitting of a luminous flux from the light source. The illumination optical system has the polarization conversion element including a polarization beam splitter array, a plurality of ½ wave plates, and a mask. The light source is a discharge gas exciting arc tube of a DC drive type.

REFERENCES:
patent: 5589726 (1996-12-01), Gold
patent: 6154320 (2000-11-01), Itoh et al.
patent: 6260972 (2001-07-01), Robinson et al.
patent: 6412951 (2002-07-01), Sawai
patent: 6803972 (2004-10-01), Budd et al.
patent: 7021765 (2006-04-01), Koide
patent: 2002/0176255 (2002-11-01), Yamauchi et al.
patent: 2004/0246586 (2004-12-01), Cho et al.
patent: 11-64848 (1999-03-01), None

Affiliated with

Also associated with

Rating

Illumination optical system and projection display optical... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Illumination optical system and projection display optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Illumination optical system and projection display optical... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3872625