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5631107 Method for producing optical member  
Disclosed is a method for producing an optical member having excellent optical characteristics. An optical member is composed of a support plate and an optical sheet stuck on said plate via an...
5627663 Secure optical identification method and means  
In a preferred embodiment, a method of providing secure identification for an article, including: providing on the article a diffraction grating strip including a pattern of a series of...
5621547 Illumination device and application to a display device  
The invention relates to an illumination device in which a holographic device (HPi) separates the polarizations of an incident beam. The resulting polarized beam is transmitted to a holographic...
5613022 Diffractive display and method utilizing reflective or transmissive light yielding single pixel full color capability  
The present invention is directed to a diffractive display suitable for presenting graphic and the like displays. Broadly, the novel display is realized from a diffraction pattern (132) carried by...
5607799 Optical photorefractive article  
The present invention relates to a three-component optical photorefractive article having improved diffraction efficiency. The article comprises (i) nonphotoconductive polymer, (ii)...
5606433 Lamination of multilayer photopolymer holograms  
A process for making a multilayer photopolymer hologram structure without intervening adhesive layers between component photopolymer layers. The process includes the steps of exposing a first...
5602657 Hologram system having hologram layers with rotationally offset Bragg planes  
A hologram system is comprised of two identical volume holograms. Both holograms have Bragg planes oriented perpendicular to the surface of the hologram. The first volume hologram separates a...
5602656 Apparatus and method for monitoring holographic light protection filters  
Method and apparatus for monitoring wavelength shift in a holographic light protection filter to determine if the hologram has been damaged by moisture. The hologram is provided with first, second...
5593765 Holographic image containing foil-textile laminate  
A process for the production of a flexible laminate having an outer and visible layer which provides a holographic effect. A metal foil bearing a holographic image and a layer of plastics size is...
5589956 Image display apparatus  
An image display apparatus includes a plurality of image display elements respectively assigned to different partial image information regions of an image to be displayed, and a hologram optical...
5569565 Hologram recording material  
A hologram recording device, which comprises a recording layer of a polymer composition a photoconductive element, a second-order super-polarization element and an electron or hole capturing...
5557701 Power laser delivery fiber system with enhanced damage threshold  
A flexible fiber optic delivery system for medical and industrial applications is described that can transmit high laser power densities and optical images. A parabolic-index profile of a...
5546198 Generation of selective visual effects  
A method and a viewing device for generation of selective visual effects. The method entails encoding a holographic optical transparency for generating pre-selected patterns of light when...
5535024 Photorefractive holographic interference novelty filter  
A novelty filter utilizes self-nulling and self-aligning of reflection and transmission phase conjugate beams. A photorefractive crystal is arranged so that the contributions to the phase...
5529861 Method for enhancing the utility of a photopolymer recording media for holographic data recording  
A holographic storage media (10) is fabricated from a thin layer of photopolymer recording media. The photopolymer recording media is disposed between a substrate (48) and a capping layer (56)....
5526144 Optical system with pivoting hologram  
An optical data storage system includes a pivotally mounted hologram. Rotation of the hologram results in beam displacement at the optical medium for purposes of fine tracking. The hologram is...
5517338 Composite mirrors  
Composite mirrors on a substrate comprising a mixture of up to 20 percent of polymer and at least 80 percent of metal clusters, e.g. of gold, palladium or silver, which have a nominal diameter...
5517336 Display card with interactive imagery and method of producing same  
A display card is provided on one surface thereof with two images which appear to an observer to be interacting. One of the images is provided on the card by quality ink printing such as...
5510911 Holographic image containing foil-textile laminate and process for the production thereof  
A process for the production of a flexible laminate having an outer and visible layer which provides a holographic effect. A metal foil bearing a holographic image and a layer of plastics size is...
5504593 Continuous and uniform hologram recording method and uniformly recorded hologram  
A hologram recording method wherein a transparent member for introducing a light beam into a recording material is designed so that the transparent member and the recording film can be uniformly...
5500310 Holographic flake pigment  
Holographic flake pigments, processes for making the pigments, decorative coatings comprising the pigments, and articles comprising the decorative coatings are disclosed. The pigment comprises...
5500311 Holographic flake pigment  
Holographic flake pigments, processes for making the pigments, decorative coatings comprising the pigments, and articles comprising the decorative coatings are disclosed. The pigment comprises...
5491570 Methods and devices for using photorefractive materials at infrared wavelengths  
A method of writing plane holographic gratings Bragg-matched for reflection in the infrared in a photorefractive material using shorter wavelength light through a face perpendicular to the grating...
5483362 Compact holographic sight  
A holographic sight which includes a base having at least one connector for mounting the base on a small arm, and a hologram of a reticle pattern, a compact laser light source for illuminating the...
5466548 Method for producing nanometer order dot pattern by electron holography and drawing apparatus for the same  
In a nanometer order dot pattern producing method and drawing apparatus by electron holography, a nanometer order dot pattern is readily produced with a high accuracy, using a pair of biprisms or...
5464710 Enhancement of optically variable images  
The optically variable image in optically variable imaging devices, such as holograms, kinegrams, pixelgrams and interference gratings, is enhanced by coating the image relief or interference...
5455129 Holographic products with sealed edges  
A holographic product with sealed edges which will resist delamination before and after attachment to a substrate when exposed to moisture or abrasion resulting from ordinary usage. The...
5453854 Device to check the position and orientation of a mirror  
To servocontrol the direction and the position of a collimation mirror of a head-up visor, holographic elements are used. These holographic elements deflect a part of the light reflected by the...
5452282 Optical data storage disc  
A process for producing an optical data storage disc (e.g., a compact disc) carrying a digital recording and also carries a holographic image is disclosed. The holographic recording occupies an...
5440669 Photorefractive systems and methods  
A new type of holographic recording in photorefractive crystals is disclosed, termed orthogonal data storage, in which counterpropagating, reflection mode holograms are wavelength multiplexed to...
5428466 Neural networks  
A neural network has inputs formed by square array of optical modulators Mij and outputs by optical detectors Dij coupled to threshold comparators. A holographic plate includes a spatial modulator...
5415950 Holographic flake pigment  
Holographic flake pigments, processes for making the pigments, decorative coatings comprising the pigments, and articles comprising the decorative coatings are disclosed. The pigment comprises...
5397662 Process for forming a polymerized material and presenting holographic images  
A photopolymerizable composition includes a water-insoluble olefinic compound that is polymerizable with free-radical initiators, an oil-soluble phenothiazine dye that is soluble in...
5383038 Holographic optical memory using semiconductor microcrystallite doped glasses and method using same  
There is described a semiconductor microcrystallite doped glass that exhibits SHG, and a method of preparing, or encoding, a semiconductor microcrystallite doped glass by the simultaneous...
5352582 Holographic based bio-assay  
An apparatus detects a target reactant that binds to an immobilized reactant. The apparatus generates a holographic image at a predetermined location when the reactants are present and bound to...
5347435 Linear lamp holographic trapped beam center high mounted stoplight  
A holographic center high mounted stop light (CHMSL) employing a linear lamp source comprising a long and narrow cylindrical gas discharge bulb, a non-imaging light concentrator cavity, a plastic...
5344808 Intermediate transfer medium and process for producing image-recorded article making use of the same  
An intermediate transfer medium comprises a heat-resistant base sheet and provided thereon a release layer and an image-receiving adhesive layer on which an image pattern is formed by a...
5341211 Apparatus for making absolute two-demensional position measurements  
An apparatus is proposed for making absolute, two-dimensional measurements of the position of an object (10) with reference to a measuring arrangement (11), with the surface of the object (10)...
5335098 Fixing method for narrow bandwidth volume holograms in photorefractive materials  
An improved method for storing permanent holographic gratings in photorefractive materials for use in narrow band filters such as the H60 filter, as well as the filters themselves. The invention...
5331445 Increased Bragg angle sensitivity hologram system and method  
A hologram system comprises two volume holograms on two separate substrates which are cemented together with an optical cement. The two volume holograms are manufactured with identical Bragg...
5331444 Moisture-insensitive holograms and method for making the same  
Reflection holograms to be viewed through the front side of a transparent and preferably flexible substrate, and which are insensitive to moisture in liquid and in vapor form, are produced by...
5313317 Hologram  
A hologram includes an optically transparent base plate having first and second opposite surfaces. A hologram element is provided on the first surface of the base plate, and has a predetermined...
5299035 Holographic imaging through scattering media  
An image of an object embedded in a diffusing medium is formed by propagating a coherent or equivalent light pulse through the diffusing medium and applying a reference pulse so as to gate...
5296948 Hologram light box  
A light box includes a lower casing and an upper casing pivotally connected to the lower casing. A lighting element is pivotally mounted to the inner side of the lower casing. A plurality of pairs...
5293259 Integrated rainbow hologram  
A holographic display and method for displaying hologram are disclosed. The method and apparatus provides a compact display arrangement in which the light source for illuminating the display is...
5293272 High finesse holographic fabry-perot etalon and method of fabricating  
A high finesse holographic Fabry-Perot etalon and method of making a high finesse holographic Fabry-Perot etalon is disclosed. Particularly, a holographic Fabry-Perot etalon which achieves high...
5291320 Higher order diffraction in holography  
A method and apparatus for highly efficient use of higher-order diffraction beam in holography. The thermoplastic hologram (10) is recorded at a recording angle (θR) between two coherent beams...
5291315 Method of obtaining hologram and an exposure apparatus  
A hologram exposure apparatus for and method of obtaining a hologram using a photoresist for an in-line type interferometer wherein a photoresist substrate is detachably mounted on a substrate...
5291321 Method and apparatus for making hologram  
A method and an apparatus for making a hologram wherein interference patterns to be recorded on a hologram plate are prevented from travelling, thereby enabling a high quality hologram to be made....
5276537 Diamondlike carbon thin film protected hologram and method of making same  
A diamondlike carbon thin film protected hologram comprises an organic film deposited on a substrate and recorded to form a hologram, and a diamondlike carbon thin film deposited on the hologram,...