Optics: image projectors – Polarizer or interference filter
Reexamination Certificate
2008-07-29
2008-07-29
Sever, Andrew T (Department: 2851)
Optics: image projectors
Polarizer or interference filter
C353S032000, C353S081000, C348S742000, C348S752000
Reexamination Certificate
active
07404643
ABSTRACT:
A projector has an illumination system, an electro-optical modulator, a projection optical system, and a scanning system. The illumination system has a light source, a first lens array, a second lens array, a polarization conversion element and a superposing lens. The polarization conversion element includes a polarized light separating element and a phase plate. The polarized light separating element includes a plurality of polarized light separating prisms each of which has a polarized light separating surface and a reflection surface. The plurality of polarized light separating prisms are arranged along the one direction, and polarized light separating surfaces in the polarized light separating prisms at both ends of the polarized light separating element in one direction are constituted so as to reflect the luminous flux involving the second polarized light component in a direction approaching the illumination optical axis.
REFERENCES:
patent: 6000802 (1999-12-01), Hashizume et al.
patent: 6147802 (2000-11-01), Itoh et al.
patent: 6246450 (2001-06-01), Inbar
patent: 6310723 (2001-10-01), Itoh et al.
patent: 6344927 (2002-02-01), Itoh et al.
patent: 6411438 (2002-06-01), Itoh et al.
patent: 6445500 (2002-09-01), Itoh
patent: 6497488 (2002-12-01), Yamauchi et al.
patent: 6667834 (2003-12-01), Itoh
patent: 6834962 (2004-12-01), Seo
patent: 6896371 (2005-05-01), Shimizu et al.
patent: 7052141 (2006-05-01), Akiyama
patent: 7104652 (2006-09-01), Kojima
patent: 7119957 (2006-10-01), Itoh et al.
patent: 7213927 (2007-05-01), Akiyama
patent: 2002/0093737 (2002-07-01), Itoh et al.
patent: 2002/0191154 (2002-12-01), Shahzad et al.
patent: 2003/0164901 (2003-09-01), Ouchi et al.
patent: 2005/0036075 (2005-02-01), Taoka et al.
patent: 2005/0168699 (2005-08-01), Suzuki et al.
patent: 2005/0185144 (2005-08-01), Imahase et al.
patent: 2006/0007521 (2006-01-01), Akiyama
patent: 2006/0061894 (2006-03-01), Li
patent: 2006/0092390 (2006-05-01), Akiyama
patent: 2006/0164601 (2006-07-01), Akiyama
patent: 2006/0187417 (2006-08-01), Akiyama et al.
patent: 2006/0187418 (2006-08-01), Akiyama
patent: 2006/0192922 (2006-08-01), Akiyama
patent: 2006/0203202 (2006-09-01), Uchiyama et al.
patent: 2006/0256288 (2006-11-01), De Vaan
patent: 2007/0024974 (2007-02-01), Itoh et al.
patent: 2007/0035704 (2007-02-01), Akiyama
patent: 09-120067 (1997-05-01), None
patent: 2002-148712 (2002-05-01), None
patent: A-2002-287096 (2002-10-01), None
patent: A-2004-139020 (2004-05-01), None
Taiichiro Kurita, NHK Science and Technical Research Laboratories, “Picture Quality of Hold Type Display for Moving Images”, Technical Report of the Institute of Electronics, Information and Communications Engineers, EID99-10, pp. 55-60 w/English translation.
Oliff & Berridg,e PLC
Seiko Epson Corporation
Sever Andrew T
LandOfFree
Projector having polarization conversion element does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Projector having polarization conversion element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projector having polarization conversion element will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2788326