Optics: image projectors – Composite projected image – Multicolor picture
Patent
1995-08-23
1998-02-10
Dowling, William
Optics: image projectors
Composite projected image
Multicolor picture
353 20, 353 8, 349 9, 359496, G03B 2114
Patent
active
057161224
ABSTRACT:
The present invention relates to optical apparatus provided with an optical element for outputting polarized light beams separated generally in parallel. The optical apparatus according to this invention comprises an optical element having a pair of optical members being prisms cross sections of which are right-angled triangles similar to each other, each having a vertex angle of less than 45 degrees, and being constructed in a unitary double prism structure in which the optical members are cemented to each other between side faces thereof, each side face being between the right angle and the vertex angle of less than 45 degrees out of two orthogonal side faces of each optical member, and a polarization splitting portion comprising an optical thin film group formed on the cemented faces of the double prism structure to polarization-split light incident thereto.
REFERENCES:
patent: 3511556 (1970-05-01), Ammauu
patent: 3824002 (1974-07-01), Beard
patent: 4127322 (1978-11-01), Jacobson et al.
patent: 4913529 (1990-04-01), Golderberg et al.
patent: 5130826 (1992-07-01), Takanashi et al.
patent: 5264951 (1993-11-01), Takanashi et al.
patent: 5379135 (1995-01-01), Nakagaki et al.
patent: 5575548 (1996-11-01), Lee
patent: 5601351 (1997-02-01), vanderBrandt
Esaki Sampei
Hattori Tetsuo
Inoue Shingo
Katano Katsuhiko
Yoshino Kunihiko
Dowling William
Nikon Corporation
LandOfFree
Optical apparatus using polarizing beam splitter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical apparatus using polarizing beam splitter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical apparatus using polarizing beam splitter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2072052