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5790284 Display apparatus and displaying method for image display producing stereoscopic effect  
This specification discloses a displaying apparatus having a display emitting light, and an optical element formed by two holograms each having optical power and partially overlapping each other....
5784181 Illumination device for illuminating a display device  
The invention relates to an illumination device for illuminating a display device. In a preferred embodiment, non-polarized light from a non-polarized light source is polarized by a holographic...
5784182 Directional sight for instruments  
The sight comprises a support adapted for mounting onto an instrument to be aimed at a target, an optical device mounted onto the support for creating an image including a first sighting mark at a...
5776286 Hologram manufacturing process and method for efficiently providing a multi-holographic optical element substrate unit  
The present invention provides a manufacturing process (600) and method (500) for efficiently providing a multi-holographic optical element substrate unit. Upon preparation of an original...
5767993 Holographic display transmitting device  
A holographic apparatus for continually sensing, transmitting and reconstructing a three-dimensional image including a device for receiving a holographic interference pattern such as a video...
5764390 Holographic method for generating three dimensional conformal photo-lithographic masks  
A three-dimensional photo mask is formed from a substrate having a first side and a three-dimensional side. A hologram is provided on the first side of the substrate. The three-dimensional side of...
5716695 Cross-laminated multilayer film structures for use in the production of banknotes or the like  
A laminated multilayer film substrate for use in the production of banknotes. The film substrate includes a first layer comprising at least about 50 weight percent of a high density polyethylene...
5706107 Windshield grating hologram for increasing bus driver's field of view  
A holographic viewing apparatus for allowing an operator of a bus to view a portion of a blind spot region located in front of the bus and below the windshield of the bus. The holographic viewing...
5703703 Holographic ornament  
A holographic ornament comprises a hologram which has an operative surface. In one embodiment, the operative surface is masked by a masking member. The masking member is formed with at least one...
5703702 Holographic synthesis  
A tight packed array of amplitude controlled in-phase light emitters produces dynamic real holographic images. A partially reflecting mirror is applied to a planar array of amplitude controlled...
5698343 Laser wavelength detection and energy dosimetry badge  
A new personal laser dosimetry badge records intentional or unintentional exposure to laser radiation. A Fresnel biprism is mounted over a layer of photopolymerizable material, preferably a...
5695894 Method and apparatus for changing the scale of a pattern printed from a total internal reflection hologram  
An apparatus is disclosed for changing the scale of a pattern printed from a total internal reflection hologram into a photosensitive layer, which apparatus includes means for reconstructing an...
5694230 Diffractive optical elements as combiners  
A combiner for combining light traveling on two optical paths to permit coincident viewing of the light includes a light-transmissive substrate having first and second surfaces, the first surface...
5691830 Holographic optical system including waveplate and aliasing suppression filter  
A holographic optical system includes volume hologram configurations providing a waveplate for, e.g. an optical storage device, and an aliasing suppression filter. The waveplate has diffraction...
5654116 Hologram  
A hologram comprising a diffraction grating film with an interference fringe recorded thereon, a substrate provided on one side of said diffraction grating film, and cover plates provided on the...
5633100 Holographic imaging using filters  
This invention relates to a process for forming a reflection hologram. A process for forming a volume reflection hologram is provided wherein the formation of secondary holograms is suppressed by...
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...
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...
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...
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...
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...
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...