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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 diffraction...
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5621547 |
Illumination device and application to a display device
The invention relates to an illumination device in which a holographic device (HP i ) separates the polarizations of an incident beam. The resulting polarized beam is transmitted to a holographic...
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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...
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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)...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 conjugate...
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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). The...
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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...
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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...
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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 less...
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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...
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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...
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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...
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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...
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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...
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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...
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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 holographic...
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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...
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5428466 |
Neural networks
A neural network has inputs formed by square array of optical modulators M ij and outputs by optical detectors D ij coupled to threshold comparators. A holographic plate includes a spatial...
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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...
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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 injection...
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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 one...
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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...
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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 sublimation...
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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)...
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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 H 60 filter, as well as the filters themselves. The invention...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 (θ R ) between two coherent beams...
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