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Class Information
Number: 349/18
Name: Liquid crystal cells, elements and systems > Liquid crystal system > Variable or rotatable retarder used with other retarders to produce filtering effects (solc, lyot, partial)
Description: Subject matter wherein a liquid crystal element forms a variable or rotatable retarder which is combined with other retarders to form a tunable filter, such that the relative orientations of the retarders produce a precise output.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7564504 |
Phase plate and an optical data recording/reproducing device |
Jul. 21, 2009 |
| 7534991 |
Athermalized birefringent filter apparatus and method |
May. 19, 2009 |
| 7505101 |
Liquid crystal display |
Mar. 17, 2009 |
| 7483088 |
Tunable terahertz wavelength selector device using magnetically controlled birefringence of liquid crystals |
Jan. 27, 2009 |
| 7461940 |
Illumination system for displaying images without color break |
Dec. 9, 2008 |
| 7443585 |
Polarizer, polarization light source and image display unit using them |
Oct. 28, 2008 |
| 7336323 |
Liquid crystal filter with tunable rejection band |
Feb. 26, 2008 |
| 7326451 |
Rotatory polarization plate, optical element, light condensation backlight system and liquid crystal display |
Feb. 5, 2008 |
| 7315665 |
Liquid-crystal planar-waveguide apparatus and method for fast control of polarization and other properties of light |
Jan. 1, 2008 |
| 7298428 |
Liquid crystal device and method for optical performance monitoring in fiber optic communication systems |
Nov. 20, 2007 |
| 7262820 |
Liquid crystal panel, optical pickup, and information reproducing apparatus |
Aug. 28, 2007 |
| 7196744 |
Optical transceiver package with a liquid crystal variable optical attenuator |
Mar. 27, 2007 |
| 7195356 |
Split-path color switching system and method |
Mar. 27, 2007 |
| 7167230 |
Liquid crystal variable wavelength filter unit, and driving method thereof |
Jan. 23, 2007 |
| 7110054 |
Switchable color filter |
Sep. 19, 2006 |
| 7083282 |
Light recycling colored light source and method of using |
Aug. 1, 2006 |
| 7058252 |
Optical switching apparatus |
Jun. 6, 2006 |
| 7023506 |
Reflective liquid crystal display device |
Apr. 4, 2006 |
| 7009680 |
Narrow band tunable filter with integrated detector |
Mar. 7, 2006 |
| 6992809 |
Multi-conjugate liquid crystal tunable filter |
Jan. 31, 2006 |
| 6853413 |
Polarized display with wide-angle illumination |
Feb. 8, 2005 |
| 6735009 |
Electroptic device |
May. 11, 2004 |
| 6722768 |
Projector |
Apr. 20, 2004 |
| 6674932 |
Bistable molecular mechanical devices with a middle rotating segment activated by an electric field for electronic switching, gating, and memory applications |
Jan. 6, 2004 |
| 6593985 |
Color shutter and color image display apparatus |
Jul. 15, 2003 |
| 6565212 |
Projection display apparatus, and information processing system and image recording/reproducing system using the same |
May. 20, 2003 |
| 6567202 |
Wavelength compensation in a WSXC using off-voltage control |
May. 20, 2003 |
| 6522467 |
Polarization insensitive liquid crystal tunable filter |
Feb. 18, 2003 |
| 6452646 |
Optical retarder stack formed of multiple retarder sheets |
Sep. 17, 2002 |
| 6417892 |
Color filters, sequencers and displays using color selective light modulators |
Jul. 9, 2002 |
| 6351327 |
Liquid crystal pixel current sensing for silicon micro displays |
Feb. 26, 2002 |
| 6340230 |
Method of using a retarder plate to improve contrast in a reflective imaging system |
Jan. 22, 2002 |
| 6310673 |
Transmissive optical polarizing filters designed to maximize a desired portion of a spectral output |
Oct. 30, 2001 |
| 6300929 |
Flat panel display device |
Oct. 9, 2001 |
| 6243065 |
Reflective ferroelectric liquid crystal light valve with increased light throughput |
Jun. 5, 2001 |
| 6141069 |
Liquid crystal phase modulator using a ferroelectric liquid crystal with a rotatable axis and cholesteric circular polarizers |
Oct. 31, 2000 |
| 6122028 |
Reflective liquid crystal device with polarizing beam splitter |
Sep. 19, 2000 |
| 6093345 |
Optically active compound, liquid crystal composition containing the same, and liquid crystal electro-optic element using the same |
Jul. 25, 2000 |
| 6055086 |
Method and apparatus for improved spatial light modulation |
Apr. 25, 2000 |
| 5999240 |
Optical retarder stack pair for transforming input light into polarization states having saturated color spectra |
Dec. 7, 1999 |
| 5953083 |
Retarder stacks for polarizing a first color spectrum along a first axis and a second color spectrum along a second axis |
Sep. 14, 1999 |
| 5929946 |
Retarder stack for preconditioning light for a modulator having modulation and isotropic states of polarization |
Jul. 27, 1999 |
| 5822021 |
Color shutter liquid crystal display system |
Oct. 13, 1998 |
| 5751384 |
Color polarizers for polarizing an additive color spectrum along a first axis and it's compliment along a second axis |
May. 12, 1998 |
| 5592314 |
Tunable wavelength filter formed by 2 lcds in series having opposite twist angles of n*.pi./2 and a dielectric mirror layer on each substrate |
Jan. 7, 1997 |
| 5414546 |
Dynamic optical notch filter |
May. 9, 1995 |
| 5381253 |
Chiral smectic liquid crystal optical modulators having variable retardation |
Jan. 10, 1995 |
| 5347382 |
Liquid crystal cell retarder with driving beyond retardance value and two cells for high speed |
Sep. 13, 1994 |
| 5247378 |
Optical retarder having means for determining the retardance of the cell corresponding to the sensed capacitance thereof |
Sep. 21, 1993 |
| 5243455 |
Chiral smectic liquid crystal polarization interference filters |
Sep. 7, 1993 |
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