Optical: systems and elements – Polarization without modulation – By relatively adjustable superimposed or in series polarizers
Reexamination Certificate
2008-03-04
2008-03-04
Boutsikaris, Leonidas (Department: 2872)
Optical: systems and elements
Polarization without modulation
By relatively adjustable superimposed or in series polarizers
C359S494010, C359S490020, C349S009000, C353S020000
Reexamination Certificate
active
11414755
ABSTRACT:
A waveguide polarization recovery system both polarizes the input light energy for use with an LCD imager and converts the polarity of unusable light energy to add to the illumination of the LCD imager. The compact polarization recovery waveguide system generally includes: (1) an input waveguide that provides non-polarized light energy into the system; (2) an output waveguide that receives polarized light energy from the system; (3) a polarized beam splitter that received the light energy from the input waveguide and transmits light energy of a first polarization type and reflects light energy of a second polarization type, and (4) a wave plate that modifies the polarization of either the transmitted or reflected light energy. The polarization recovery system also generally includes one or more mirrors that are positioned as need to direct the transmitted and the reflected light energy to the output waveguide. The input and output waveguides may be shaped as needed by the projection system. For example, either one or both of the input and output waveguides may be tapered as needed to produce a desired image. In the waveguide polarization recovery system, the input and output waveguides are configured to have either an either a substantially parallel or a substantially perpendicular orientation. In another embodiment, the waveguide polarization recovery system further includes has one or more “gaps” of optically clear material positioned between the optical components to encourage the occurrence to total internal reflection that minimizes the loss of the optical energy by the system.
REFERENCES:
patent: 3511556 (1970-05-01), Ammann
patent: 4173412 (1979-11-01), Ramsay et al.
patent: 5122895 (1992-06-01), Takanashi et al.
patent: 5301030 (1994-04-01), Ko
patent: 5303083 (1994-04-01), Blanchard et al.
patent: 5381278 (1995-01-01), Shingaki et al.
patent: 5513023 (1996-04-01), Fritz et al.
patent: 5625738 (1997-04-01), Magarill
patent: 5712694 (1998-01-01), Taira et al.
patent: 5751480 (1998-05-01), Kitagishi
patent: 5786873 (1998-07-01), Chiu et al.
patent: 5884991 (1999-03-01), Levis et al.
patent: 5995284 (1999-11-01), Vanderwerf
patent: 6053615 (2000-04-01), Peterson et al.
patent: 6104454 (2000-08-01), Hiyama et al.
patent: 6139157 (2000-10-01), Okuyuma
patent: 6243149 (2001-06-01), Swanson et al.
patent: 6247814 (2001-06-01), Lin
patent: 6375330 (2002-04-01), Mihalakis
patent: 6411749 (2002-06-01), Teng et al.
patent: 6492800 (2002-12-01), Woods et al.
patent: 6587269 (2003-07-01), Li
patent: 6678078 (2004-01-01), Popovich et al.
patent: 2002/0012101 (2002-01-01), Takeuchi et al.
patent: 2005/0036203 (2005-02-01), Ferri et al.
patent: 2290860 (2000-05-01), None
patent: 584 802 (1994-03-01), None
patent: 0 691 552 (1996-01-01), None
patent: 9-326205 (1997-12-01), None
patent: WO-93/24857 (1993-12-01), None
patent: WO-95/27919 (1995-10-01), None
Boutsikaris Leonidas
Fulbright & Jaworski LLP
Wavien, Inc.
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