Optics: image projectors – Reflector – Plural
Reexamination Certificate
2009-05-18
2011-10-04
Epps, Georgia Y (Department: 2878)
Optics: image projectors
Reflector
Plural
C353S098000
Reexamination Certificate
active
08029147
ABSTRACT:
A projection optical system having a magnification side and a reduction side for forming a magnified image on a magnification side image surface conjugate with a reduction side conjugate image surface includes, arranged in order from the reduction side, a first imaging system including a plurality of lens elements and lens components and a second imaging system including a mirror having a concave, aspheric reflecting surface. An intermediate image is formed between the first imaging system and the second imaging system. The projection optical system satisfies specified conditions related to the travel of principal rays through the projection optical system and related to the Abbe number of a lens element having positive refractive power of the first imaging system. A projection display device includes the projection optical system and may include a light valve for modulating a light beam for projection on a screen.
REFERENCES:
patent: 4983026 (1991-01-01), Kudo et al.
patent: 5086355 (1992-02-01), Kudo et al.
patent: 5477394 (1995-12-01), Shibazaki
patent: 5716118 (1998-02-01), Sato et al.
patent: 6771427 (2004-08-01), Matsuo
patent: 7048388 (2006-05-01), Takaura et al.
patent: 7441908 (2008-10-01), Takaura et al.
patent: 2004/0156117 (2004-08-01), Takaura et al.
patent: 63-165813 (1988-07-01), None
patent: 7-1315 (1995-01-01), None
patent: 9-179064 (1997-07-01), None
patent: 2002-148514 (2002-05-01), None
patent: 2002-174853 (2002-06-01), None
patent: 2004-258620 (2004-09-01), None
patent: 2007-79524 (2007-03-01), None
patent: 01/06295 (2001-01-01), None
patent: WO 2006/043666 (2006-04-01), None
Notification of Reasons for Refusal issued Nov. 24, 2010 for Japanese Application No. 2005-053782.
Birch & Stewart Kolasch & Birch, LLP
Epps Georgia Y
Fujinon Corporation
Le Bao-Luan
LandOfFree
Projection optical system and projection display device... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Projection optical system and projection display device..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projection optical system and projection display device... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4267980