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7605882 |
Optimizing performance parameters for switchable polymer dispersed liquid crystal optical elements
Described herein are the materials, mechanisms and procedures for optimizing various performance parameters of HPDLC optical devices in order to meet differing performance requirements. These...
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7601992 |
Light detecting element and control method of light detecting element
A light detecting element 1 including an element formation layer 22 which contains a well region 31. A surface electrode 25 is formed on the layer 22 through an insulating layer 24. The...
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7601957 |
Electron microscope and combined illumination lens
An object of the present invention is to provide an electron microscope that employs a hologram of a diffraction pattern to reconstruct a microscopic image involving no imaging aberration due to...
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7599514 |
Optical information reading device
The present invention provides an optical information reading device includes: a light source that irradiates, with reference beam, a hologram recorded in an optical recording medium; a reading...
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7597457 |
Lighting apparatus
A lighting apparatus is provided. The lighting apparatus includes a power supply housing section, a circuit board housing section, a light source housing section, a cutout portion, and a light...
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7589876 |
Holographic memory reproduction method and apparatus
A method and apparatus for performing reproduction position servo-control without reducing the recording capacity of a holographic recording medium. Upon the reproduction of a holographic recording...
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7583875 |
Illumination device, image display device, and projector
An image display device includes: a first face; a laser light source device emitting laser light; and a diffractive optical element on which the laser light emitted from the laser light source...
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7583423 |
Switchable polymer-dispersed liquid crystal optical elements
Transmission and reflection type holograms may be formed utilizing a novel polymer-dispersed liquid crystal (PDLC) material and its unique switching characteristics to form optical elements....
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7573623 |
Hologram recording method using beam with very large incident angle, hologram reproduction apparatus using holographic reflector and hologram reproduction method using the same, and flat display element apparatus using holographic reflector
Disclosed is a hologram recording method using a beam with a very large incident angle, a hologram reproduction apparatus using a holographic reflector, a hologram reproduction method using the...
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7570405 |
Optimizing performance parameters for switchable polymer dispersed liquid crystal optical elements
Described herein are the materials, mechanisms and procedures for optimizing various performance parameters of HPDLC optical devices in order to meet differing performance requirements. These...
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7570404 |
Multi-state optical switch and combiner for use in a light engine and image presentation device using the same
An image presentation device ( 100 ) incorporates an optical combiner ( 130 ) that utilizes a multi-state optical switch ( 131, 137 ) for use with a plurality of colored light sources ( 122,...
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7570315 |
Display apparatus
A display apparatus includes a display that displays individual images in a plurality of viewing directions on a common screen, a main body having a different chassis from that of the display, a...
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7557990 |
Method and apparatus for a Bragg grating tunable filter
The present invention relates to tunable filters. More specifically, the present invention pertains to a method and apparatus that allows tuning of a wavelength over a large optical band. The...
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7554737 |
Illumination device and method using adaptable source and output format
Systems and methods for providing illumination suitable for imaging devices such as laser projection systems, wherein the illumination pattern is adjustable by modifying one or more characteristics...
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7551818 |
High power optical fiber laser array holographic coupler manufacturing method
A chirped grating is made in a thin film layer or a glass layer for producing a holographic optical element within the layer well suited for use as an optical coupler for coupling side fired laser...
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7548359 |
Double-wavelength light source unit and optical head device having four diffraction gratings
A double-wavelength light source unit capable of stable signal detection, is realized. The double-wavelength light source unit comprises a double-wavelength light source, a photodetector and a...
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7545545 |
Fabrication process for cholesteric liquid crystal media having a volume hologram
The invention provides a process capable of fabricating a cholesteric liquid crystal medium having a volume hologram with efficiency yet without recourse to complicated steps such as an alignment...
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7542639 |
Holographic pump coupler and laser grating reflector
In the present invention, a volume holographic optical element is used as a pump coupler. The holographic coupler allows at least one pump wavelength to be coupled into the laser medium. The...
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7535607 |
Device for holographic reconstruction of three-dimensional scenes
A device for holographic reconstruction of three-dimensional scenes includes optical focusing means which directs sufficiently coherent light from light means to the eyes of at least one observer...
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7527412 |
Surface emitting device and display apparatus including the same
A surface emitting device and a display apparatus including the same. The surface emitting device includes: a light source; and a light guide plate having a light exit surface on which holographic...
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7520623 |
Transmission-type screen and projection-type display device
In a transmission-type screen and a projection-type display device, which are superior in contrast, a transmission-type screen characterized by including a display plane; a front side layer; and a...
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7515319 |
Lens-less spectrometer
A lens-less system for analyzing an optical spectrum includes a sophisticated volume hologram for separating an incident diffuse optical signal into wavelength channels without aid of an external...
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7511805 |
Holographic test plate for positioning and aligning pipes
A target plate (Z) according to the invention for positioning components, in particular pipes (R 1 , R 2 ), has a holographic optical element as a holographic diffusor. By means of the diffusor,...
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7511784 |
Hologram color filter, method for fabricating the same, and color liquid crystal display comprising it
A hologram color filter diffraction-separates an incident lightwave using a hologram to project thus separated lightwaves having different-wavelengths at intended positions with a specified spatial...
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7508559 |
Synthetic colour hologram
A surface relief hologram that includes two or more patterns, each pattern being sensitive to different radiation wavelengths. The hologram is made by defining relief features that are sensitive to...
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7502168 |
Optical device and image display apparatus
An optical device includes a light guide plate, and first and second reflective volume hologram diffraction grating members. The first member has interference fringes extending from therewithin...
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7502153 |
Image display apparatus
In an image display apparatus, two light sources emit illumination light having different wavelengths, with which a liquid crystal display device is illuminated. By modulating the illumination...
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7502152 |
Device for projecting an object in a space inside a vehicle
A device for projecting an object in a space of a vehicle is described. This object is preferably projected holographically, and a voice input and output system is assigned to this object. An...
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7480084 |
Holographic filter with a wide angular field of view and a narrow spectral bandwidth
A holographic optical filter that includes an optical recording medium for storing several multiplexed reflection holograms that are formed by successive interference between two or more collimated...
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7473009 |
Direct type back light unit for liquid crystal display device
A back light unit for a liquid crystal display device for improving uniformity of the light and dispensing with optical sheets. The back light unit includes a light source having a holographic...
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7471430 |
Holographic image corrector
The invention provides a holographic image corrector in a microscope, which employs an optical system that has as an objective a lens or mirror. The characteristics of the objective are recorded by...
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7458691 |
Holographic combiners for illumination of spatial light modulators in projection systems
Described is an optical device for combining multiple light sources in an optical projection system. One embodiment of the optical device includes at least two light sources having first and second...
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7457016 |
Optical system for processing CD, DVD and holographic digital data
An optical system capable of selectively processing CD, DVD and holographic digital data is provided. The system includes a beam generation unit providing a linearly polarized light beam; a beam...
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7453612 |
Optical device, and virtual image display
An optical device including an optical waveguide upon which a group of parallel light beams different in traveling direction from each other are incident and from which the group of parallel light...
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7443587 |
DOE-based systems and devices for producing laser beams having modified beam characteristics
Novel methods are disclosed for designing and constructing miniature optical systems and devices employing light diffractive optical elements (DOEs) for modifying the size and shape of laser beams...
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7443553 |
Holographic sensors and their production
An array of discrete sensors disposed on a substrate, each sensor comprising a holographic support medium and a hologram disposed throughout the volume of the medium, whereby interaction with an...
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7440153 |
Backlight unit for flat panel display and flat panel display apparatus having the same
A backlight unit for a flat panel display and a flat panel display apparatus having the same. The backlight unit for a flat panel display includes a light source emitting light, a light guide panel...
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7436560 |
Display device for a vehicle
A display device for a vehicle includes a transparent window with a light emission layer intended to separate the interior of the vehicle for emitting visible light when light is beamed onto the...
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7433105 |
Decorative film, carton, and method of making
A film having a Fresnel lens is placed adjacent a design to create a three-dimensional image. The film can be used separately or laminated to a substrate to create enclosures such as cartons,...
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7432487 |
Device for correcting output of optical pickup
Light receiving elements for receiving a + one-dimensional light divided into four are arranged in the vicinity of a light receiving part for receiving the zero-dimensional light. Some light...
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7425951 |
Three-dimensional image display apparatus, method of distributing elemental images to the display apparatus, and method of displaying three-dimensional image on the display apparatus
An apparatus is provided with a display unit and a optical filter. The unit has pixels arranged in a matrix form, which are grouped into a first group and second groups to display two-dimensional...
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7416818 |
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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7416306 |
Laser projector
A reflection-type laser projector ( 100 ) projects modulated laser beams outputted from a laser projection unit ( 40 ), on a screen, wherein a reflector ( 112 ) as a constituent of the screen ( 110...
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7400431 |
Method for encoding video holograms for holographically reconstructing a scene
A method and a device for encoding and reconstructing computer-generated video holograms using a conventional LC display: it provides holographic reconstruction of three-dimensional scenes using...
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7399421 |
Injection molded microoptics
A wafer-scale apparatus and method is described for the automation of forming, aligning and attaching two-dimensional arrays of microoptic elements on semiconductor and other image display devices,...
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7396130 |
Optical system, image projection apparatus and method thereof
An image projection apparatus. The image projection apparatus comprises a light source and LCD panel. The LCD panel comprises a plurality of pixels and color filters thereon. Light from the light...
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7388696 |
Diffuser, wavefront source, wavefront sensor and projection exposure apparatus
A wavefront source having a wavefront formation structure ( 4 a ) and a diffuser with a scattering structure ( 2 b ) in the beam path in front of or at the level of the wavefront formation...
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7385742 |
Image display apparatus
An image display apparatus has: a display element for displaying an image; a light source section for supplying an illumination light to the display element; a reflection type hologram for...
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7379219 |
Method and apparatus for illuminating a computer generated hologram
A holographic display comprising a spatial light modulator, SLM, for displaying a computer generated hologram, CGH, containing horizontal or vertical parallax only, HPO, means for illuminating the...
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7355768 |
Wavelength tunable holographic filter with broad acceptance angle and narrow spectral bandwidth
A narrowband, tunable filter with a wide acceptance angle utilizes two holographic filter elements connected in series. The filter blocks light outside of a narrow spectral band of interest, while...
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