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7551239 |
Viewing angle control element and image display based on same
A viewing angle control element of the present invention contains transparent regions 23 having a transmittance T 1 and light shield regions 24 capable of switching between a transmittance T 2...
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7468840 |
Wavelength selective optical switch
A wavelength selective switch, in which an input optical signal is wavelength-dispersed and polarization-split in two angularly oriented planes. A polarization rotation device, such as a liquid...
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7446848 |
Optical element, condensing backlight system and liquid crystal display
An optical element of the invention comprises at least two laminated circular-polarization-type-reflection polarizers (a) whose wavelength bands for selective reflection of polarized light overlap...
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7428036 |
Liquid crystal switchable coupler for coupling at least two unpolarized light inputs
A switchable coupler ( 10 ) has a first waveguide ( 15 ) defining an inlet port ( 31 ) for a first unpolarized light input (A) and a first outlet port ( 32 ), and also a second waveguide ( 16 )...
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7361878 |
Image display apparatus and image pickup apparatus with two dimensional scanning
An image forming apparatus with a light source unit emitting a light beam optically modulated based on image/video information, a scanning unit for scanning the light beam emitted from the light...
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7343064 |
Optical switch and optical add/drop multiplexer
To provide a wavelength-selection optical switch able to select a light with a certain wavelength and an optical add/drop multiplexer using the same. An optical switch comprising: a silicon...
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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...
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7212743 |
Optical switch device, and optical reception device and optical switch network in which the optical switch device is applied
The configuration of a liquid crystal switch capable of reducing attenuation in an optical switch, and an optical reception device and an optical switch network that use this liquid crystal switch...
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7209212 |
Tunable optical integrated element using liquid crystal as active layer
The present invention discloses a tunable optical integrated element using liquid crystal as an active layer, which is applied to filters, couplers or optical add/drop multiplexer. The present...
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7035501 |
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...
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7018686 |
Switchable volume hologram materials and devices
A new photopolymerizable material allows single-step, fast recording of volume holograms with properties that can be electrically controlled. Polymer-dispersed liquid crystals (PDLCs) in accordance...
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7014326 |
Wavelength blocker
A wavelength blocker including an input port for launching an input beam of light, first dispersing means for dispersing the input beam of light according to wavelength, an array of independently...
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7009680 |
Narrow band tunable filter with integrated detector
A polarization insensitive narrowband tunable filter utilizes an active liquid crystal cell to change the index of refraction and tuning of a waveguide resonant filter employing a nanostructured...
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6999156 |
Tunable subwavelength resonant grating filter
In accordance with the invention, a tunable subwavelength resonant grating filter comprises a liquid crystal cell having a pair of major surface walls. One wall of the cell is a coated...
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6992748 |
Scalable and mass-manufacturable OXC using liquid crystal cells
A 1XN (or NX1) optical connector for steering light is provided, which may be formed into an optical cross connecter. The optical connector generally includes a plurality of N stages, each stage...
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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...
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6972826 |
Liquid crystal based optical signal processing
An optical processing device includes a polarization modulator operable to change a polarization state of an input optical signal based at least in part on a control voltage applied to a liquid...
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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...
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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...
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6924850 |
Flat panel image display structures and method of manufacture
Disclosed are improved beam steering and scanning devices which utilize cholesteric liquid crystal (CLC) elements arranged in branches to form a logic tree structure. Each branch thereof comprises...
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6897917 |
Liquid crystal variable optical attenuator
A twisted nematic liquid crystal variable optical attenuator is presented with one substrate that includes a integrated subwavelength nanostructured polarizer. The device may incorporate an...
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6888582 |
Optical display system
An optical shifter includes at least one liquid crystal cell and a birefringent element. The liquid crystal cell has a first surface to receive light thereon and a second surface to pass the light...
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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...
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6760085 |
Wavelength selecting module and wavelength selecting apparatus
A wavelength selecting module includes a first collimator for collimating diverging light to generate a collimated light beam and a liquid crystal cell having a predetermined helical direction. The...
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6750940 |
Liquid crystal based optical switch utilizing diffraction
An optical switch is provided in which a cell comprised of photopolymer dispersed in a liquid crystal sandwiched between two transparent plates is first recorded with a grating utilizing two plane...
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6735016 |
Electro-optically controllable polarization insensitive optical device
A polarization independent optical device is provided wherein the device has two optical paths that include one or more birefringent crystals, a electrically controllable rotator, and a fixed...
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6563553 |
Flat panel display and method of manufacture
Disclosed are improved beam steering and scanning devices which utilize cholesteric liquid crystal (CLC) elements arranged in branches to form a logic tree structure. Each branch thereof comprises...
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6563973 |
Low-index waveguide liquid crystal cross-connect
A non-blocking N×N cross-connect is provided that has an array of liquid crystal (LC) switches in a grid of planar optical waveguides within a light optical circuit (LOC). LC-filled trenches are...
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6559921 |
Liquid crystal planar non-blocking NxN cross-connect
A non-blocking N×N cross-connect is provided that has an array of liquid crystal (LC) switches in a grid of planar optical waveguides within a light optical circuit (LOC). LC filled trenches are...
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6535257 |
Liquid crystal cell for use in coherent beams
A liquid crystal cell assembly is described which eliminates high-order multiple-beam interference from reflections at the interfaces between the various elements. It can incorporate fixed...
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6535194 |
Image display using wobbling
In an image display comprising a display element having a display surface with a regular array of a plurality of pixels, an image display control means for displaying different images different in...
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6519022 |
Optical routing switch using symmetric liquid crystal cells
An optical routing switch uses two liquid crystal cells that can produce offsetting rotations of the polarization of the input beam to provide fast, symmetrical switching. The input beam is first...
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6329026 |
Compositions containing chiral compounds and nematic liquid crystals, and devices using them
Devices useful for storage of information which comprises mixtures of suitable chiral materials with nematic liquid crystals and in which by irradiation with light of two different wavelengths the...
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6327019 |
Dual liquid-crystal wavelength-selective optical switch
A liquid-crystal switching element relying upon a segmented liquid-crystal polarization modulator, at least one frequency-dispersive grating and one or more polarization-dispersive elements, such...
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6297907 |
Devices based on surface plasmon interference filters
Devices based on surface plasmon filters having at least one metal-dielectric interface to support surface plasmon waves. A multi-layer-coupled surface plasmon notch filter is provided to have more...
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6252644 |
Wedge-shaped liquid-crystal cell having nonlinear gap
A liquid crystal, cell having plates defining a gap between them which is filled with a liquid crystal, especially a twisted nematic. The plates are made non-parallel to a predetermined degree so...
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6243055 |
Optical display system and method with optical shifting of pixel position including conversion of pixel layout to form delta to stripe pattern by time base multiplexing
An optical display system and method selectively displaces delta triad pixels vertically. The first raster line of picture information is removed from the video signal, and each subsequent raster...
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6208774 |
Polarization independent light switching device based on liquid crystals
A light guiding element for routing a light signal between an input port and an output port or for blocking the propagation of the light signal between the input and output ports depending on the...
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6181846 |
Fiberoptic liquid crystal on-off switch and variable attenuator
A fiberoptic liquid crystal on-off switch and variable attenuator is provided. The end facets of two optical fiber cores in a sleeve, a birefringent crystal, a quarter-pitch GRIN lens, a liquid...
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6172729 |
Liquid crystal display device of delta arrangement having pixel openings with sides oblique to scan lines
According to an aspect of the present invention, there is provided a liquid crystal display device of a delta type pixel arrangement, which comprises: a plurality of scan lines formed on a...
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6169594 |
Beam deflector and scanner
A beam deflector comprising a pair of mated microprism arrays with one of the arrays comprised of a variable refractive index material capable of being selectively changed in response to a field...
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6147741 |
Digital scanner employing recorded phase information and method of fabrication
A digital scanner composed of a plurality of individually addressable scanning elements. Each of the plurality of individually addressable scanning elements capable of operating in discrete states...
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6141071 |
Switchable achromatic polarization rotator
This invention provides a liquid crystal achromatic rotator switch, and an achromatic shutter using the rotator switch. The rotator switch requires input light of a fixed orientation and switches...
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6130731 |
Liquid crystal devices using a linear electro-optic effect
A device for influencing light has a polarizer, a ferroelectric or electroclinic response type liquid crystal halfwave plate whose liquid crystals are in the smectic phase with bookshelf geometry...
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6111633 |
Polarization independent optical switching device
The present invention provides for a polarization independent optical switch for selectively switching an optical signal from at least one input port to a preselected one of a plurality of...
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6081346 |
Digital image forming apparatus
The present invention allows formation of an image having an excellent finish quality by using an extremely simple and low-cost structure. Linearly polarized light transmitted through each of...
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6031658 |
Digital control polarization based optical scanner
High speed low cost billion point optical scanner using a binary optical polarization sensitive cascaded architecture network having binary switchable optical plates for scanning in one...
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6028656 |
Optical polarization switch and method of using same
An improved optical polarization switch which provides a wide field-of-view and achromatic action. Two liquid crystal cells are used and are selectively operated in a preferred embodiment to...
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5989451 |
Compounds and methods for doping liquid crystal hosts
This invention provides chiral thioindigo compounds for doping smectic liquid crystal hosts, wherein the compounds modulate a chiral bulk property of an induced chiral smectic liquid crystal phase...
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5986808 |
Surface-plasmon-wave-coupled tunable filter
A surface plasmon filter having two symmetric metal-dielectric interfaces coupled with each other to produce a transmission optical wave at a surface plasmon resonance wavelength at one interface...
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