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| Number | Title | Issue Date |
| 7352416 | Polarization direction of incident light beam perpendicular or parallel to liquid display molecular orientation for reduced drive voltage A liquid crystal display element comprising two transparent substrates, at least one of which is transparent, and a liquid crystal layer interposed between the two substrates. A plurality of pixels and active elements for driving the liquid crystal at the plurality ... | 04/01/2008 |
| 7339714 | Variable blazed grating based signal processing A light processing system includes an array of optical signal processing devices. The array of processing devices are operable to receive at least some of a first signal part and to modulate the first signal part based at least in part on a control signal received f... | 03/04/2008 |
| 7298444 | Reflection type liquid crystal display A reflective liquid crystal display disclosed herein includes a transistor substrate, a color filter substrate, a first lower electrode, a first upper electrode, a first transparent insulator, a second transparent insulator, a second lower electrode, a second upper ... | 11/20/2007 |
| 7289264 | Passive broad long wave and mid-wave infrared optical limiting prism Method for limiting the amount of radiation impinging on a radiation sensitive detector (RSD) responsive to signals having infrared wavelengths of approximately 3 to 14 microns. Method includes: directing radiation signal through prism toward RSD; permitting radiati... | 10/30/2007 |
| 7258073 | Pictorial thermometer A thermometer comprising a base sheet adapted to be secured to a window or other surface, the sheet includes distinct thermally actuated latent images thereon and each of which is adapted to reversibly depict a different article of clothing once a pre-determined tem... | 08/21/2007 |
| 7253873 | Dynamic gain equalizer A dynamic gain equalizer (1) comprises a spectroscope (4) for separating a light entering from an incoming end, a liquid crystal optical switch (5) for receiving spectral components separated by the spectroscope (4), and a lens system ( | 08/07/2007 |
| 7184200 | Passive broadband infrared optical limiter device based on a micro-optomechanical cantilever array An IR limiting device for a detector that is based on a micro-optomechanical cantilever array is disclosed. In the normal state, each microcantilever device in the array behaves like a mirror that reflects the infrared signal to the detector. The microcantilever dev... | 02/27/2007 |
| 7116862 | Apparatus and method for providing gain equalization In one aspect of the invention, a gain equalizer comprises a wavelength division demultiplexer operable to separate one or more communication bands into a plurality of wavelengths and an array of phase shifter stages. Each phase shifter stage comprises a micro-elect... | 10/03/2006 |
| 6992749 | Flat panel display and a method of fabrication thereof Provided herein is a logic tree for steering electromagnetic energy. The logic tree includes a plurality of stages. The first stage includes a branch for directing energy to a similar branch in each succeeding stage. Each stages contains 2n−1 branches, ... | 01/31/2006 |
| 6975454 | Variable polarization-dependent-loss source An optical device including a beam splitter, polarization controller, and beam combiner is described. In some embodiments, the beam splitter and beam combiner are provided in a single element. An incoming light beam is split into two beams with different polarizatio... | 12/13/2005 |
| 6972886 | Variable blazed grating In one aspect of the invention, an apparatus operable to provide optical signal processing includes an inner conductive layer including an at least substantially conductive material and a plurality of at least partially reflective mirror strips disposed outwardly fr... | 12/06/2005 |
| 6954252 | Optical switch including two integrated multiphase SLM's and a wave-plate the wave-plate providing an optical retardance of (2n+1)λ/4 An optical switch uses a polarization insensitive spatial light modulator operating by a double pass through a liquid crystal cell. The switch includes two such modulators in a cross bar arrangement. Different embodiments employing techniques for reducing cross talk... | 10/11/2005 |
| 6950171 | Liquid crystal color switch and method of manufacture This invention involves one kind of liquid crystal color light switch, made especially from cholesteric liquid crystals. By changing the voltage applied, the reflection wavelength of the color light switch can be controlled, leading to a rapid change of the reflecte... | 09/27/2005 |
| 6876429 | Flat panel display and a method of fabrication therefor Provided herein is a method for fabricating an array. A plurality of insulating media are formed having a plurality of wavelength and polarizing elements embedded therein at an angle relative to the surfaces of the media, such that the spacing between elements halve... | 04/05/2005 |
| 6870595 | Optical filter device and method of making same The optical waveguide includes an optical waveguide layer, and a filter element including an ultraviolet curing liquid crystal layer disposed in a position which divides the optical waveguide layer in a waveguide direction. The ultraviolet curing liquid crystal laye... | 03/22/2005 |
| 6859573 | Double pass arrangement for a liquid crystal device An optical device for rerouting and modifying an optical signal that uses a double pass through a liquid crystal modulator is disclosed. The optical device includes a first polarizer for providing polarized light, a liquid crystal modulator for selectively modifying... | 02/22/2005 |
| 6834137 | Cholesteric liquid crystal cell devices and systems Cholesteric liquid crystal cell units are used for reflecting or transmitting incident light responsive to control signals. A cholesteric liquid crystal cell unit has a first cholesteric liquid crystal cell and a second cholesteric liquid crystal cell. The second ch... | 12/21/2004 |
| 6680758 | Flat panel display and a method of fabrication The present invention relates to beam steering and scanning devices which utilize cholesteric liquid crystal (CLC) elements arranged in branches to form a logic tree. Each branch comprises an active and passive CLC element; the former further comprising a... | 01/20/2004 |
| 6259494 | Repairable thin film transistor matrix substrate having overlapping regions between auxiliary capacitance electrodes and drain bus A repairable integrated thin film transistor matrix substrate includes an insulated substrate, and a plurality of parallel gate bus lines and a plurality of accumulated capacitance bus lines formed on the insulated substrate. Each of the accumulated capac... | 07/10/2001 |
| 6134031 | Polarization control optical space switch The present invention is directed to an optical space switch accommodating a plurality of input light paths and output light paths. The optical space switch comprises a plurality of polarization control optical switches, each consisting essentially of: po... | 10/17/2000 |
| 6124920 | Optical device and directional display An optical device includes a plurality of picture elements the phase and/or amplitude transmission of which vary in the lateral direction of the optical device reducing the level of diffraction caused by the device.... | 09/26/2000 |
| 6091867 | M input port by N output port optical switching system An M×N optical switching system has a plurality of M optical input ports, each of which is directs a respectively associated optical input beam along one of M spaced apart coplanar parallel input optical paths intersecting an optical coupling path. N opt... | 07/18/2000 |
| 5132822 | Optical switch An optical switch for arbitrarily polarized light having low cross-talk is made in which an input beam is split into its TE (s wave) and TM (p wave) polarization components, the TM component is converted to TE by total internal reflection, the two beams a... | 07/21/1992 |
| 5128061 | Phenyl-pyrimidine liquid crystal materials Substituted-hydrocarbylthio phenyl-pyrimidines are disclosed which exhibit smectic A phases over a wide temperature range and are useful in formulating smectic A compositions. The liquid-crystal compositions formulated utilizing the smectic A compounds of... | 07/07/1992 |
| 5058999 | Liquid crystal device having distinguishing means A liquid crystal device (10) includes at least two layers of encapsulated thermochromic, e.g., liquid crystal, material (14, 16) for providing a color response with respect to temperature, the temperature ranges of color response of the at least two liqui... | 10/22/1991 |
| 4954288 | Side chain liquid crystalline polymers exhibiting nonlinear optical response This invention provides novel side chain liquid crystalline polymers. An invention polymer exhibits nonlinear optical response, and has utility as a transparent nonlinear optical component in optical light switch and light modulator devices. A present inv... | 09/04/1990 |
| 4948532 | Side chain liquid crystalline polymers exhibiting nonlinear optical properties This invention provides novel sidechain liquid crystalline polymers which exhibit nonlinear response, and which have utility as a transparent nonlinear optical component in optical light switch and light modulator devices. An invention sidechain liquid cr... | 08/14/1990 |
| 4917452 | Liquid crystal optical switching device A pair of transparent trapezoidal prisms each having angled endfaces with the larger bases in juxtaposition with respect to each other forming an interface therebetween are provided with at least one optical input and output coupled to the angled endfaces... | 04/17/1990 |
| 4913509 | Fail-safe port for use with an optical fiber A fail-safe port apparatus includes a low loss liquid crystal optical switching device providing first and second light paths, the first path providing a failure, or default, mode path and the second path providing an operating mode.... | 04/03/1990 |
| 4813769 | Liquid crystal wave division device A liquid crystal wave division device includes first and second polarization changing cells, the polarization changing cells utilize homogeneously aligned nematic liquid crystal material to effect the change of polarization of a preselected frequency port... | 03/21/1989 |
| 4792212 | Liquid crystal switching device A liquid crystal switching device includes first and second polarization reorienting cells disposed such that a polarized component of an incident light beam is incident normal to the cell.... | 12/20/1988 |
| 4790633 | Liquid crystal switching apparatus A liquid crystal switching apparatus includes a plurality of juxtaposed liquid crystal switching devices, each such device being capable of selectively reorienting the polarization of a polarized light beam component incident thereupon.... | 12/13/1988 |
| 4784470 | Optical switching device An optical switching device includes first and second polarization changing cells, the polarization changing cells utilize twisted nematic liquid crystal material to effect the change of polarization. The resultant device exhibits reduced cross talk betwe... | 11/15/1988 |
| 4781426 | Optical fiber collimator/switch including liquid crystal polarizing material A collimator includes a transparent base member defined by a planar surface and a spherical reflecting surface and includes an opening therein whereby an optical fiber may be terminated in the focal plane of the spherical reflecting surface.... | 11/01/1988 |
| 4779961 | Polymers with pendant side chains exhibiting non-linear optical response This invention provides novel polyvinyl polymers with pendant side chains which exhibit nonlinear optical response. The polymers have utility as a transparent optical component of optical switch or light modulator devices. An invention polymer is illustra... | 10/25/1988 |
| 4768864 | Liquid-crystal-based optical power limiter A broad-band optical light detector having a detector cell, a system for focusing light on the cell, and a liquid crystal positioned in the light path, the liquid crystal being prepared so that it passes light along the light path in the normal operating ... | 09/06/1988 |
| 4720171 | Liquid crystal optical switching device having reduced crosstalk A liquid crystal optical switching device having reduced crosstalk includes a liquid crystal beam splitter for splitting incident light into polarized components thereof and a liquid crystal optical switch for directing those components to either a first ... | 01/19/1988 |
| 4702557 | Optical branching device using a liquid crystal The invention relates to an optical branching device which may be used as an optical isolator, circulator or switch. The device comprises two polarization-sensitive beam splitters. Each beam splitter comprises a prism and a rhombohedral plate between whic... | 10/27/1987 |
| 4278327 | Liquid crystal matrices The improved electrooptical devices provide means for switching pluralities of polarized or unpolarized optical signals between input and output multimode single strand light guides. The electrooptical switching elements employ electric field-effect liqui... | 07/14/1981 |
