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6426811 Switchable holographic optical system  
An optical system and an imaging and display system using the optical system. The optical system has at least first and second optical elements aligned on a common axis. In one embodiment, each of...
6414762 Optical information recording and reproducing apparatus using a holographic memory  
An optical information recording and reproducing apparatus, which detachably supports a holographic memory formed of a photorefractive crystal, includes a portion for supplying a coherent...
6411406 Holographic microscope and method of hologram reconstruction  
A holographic microscope is described along with a method for numerically reconstructing a holographic image. The method uses a coordinate transformation of the Kirchhoff-Helmholtz equation to...
6407833 System and method for producing and displaying a one-step, edge-lit hologram  
A system and method are disclosed for producing and displaying a one-step, edge-lit hologram. For production, an object beam and an edge-lit reference beam are directed at holographic recording...
6392768 Dot matrix hologram with a hidden image  
A dot matrix hologram with a hidden image is disclosed, wherein the hidden image technology is applied to a dot matrix hologram. Although the hidden image technology has been used in a...
6388780 Hologram production technique  
Apparatus for producing dot matrix holograms through laser ablation utilizing only two two-axis, low-inertia beam deflectors to control the maximum holographic direction, and the holographic...
6377367 Method of recording and reproducing hologram and apparatus for recording and reproducing hologram  
The first reading beam identical to the first reference beam and the second reading beam conjugate to the second reference beam are simultaneously applied to a hologram recording medium 1, on...
6366371 Transmissively viewable reflection hologram  
A transmission hologram allowing an illuminating light source for holographic reconstruction to be placed behind the hologram, i.e. on the side opposite to the viewing side, and permitting...
6366369 Transmission hologram fabrication process  
The invention relates to a process capable of fabricating a variety of transmission holograms having a simple structure, a wide visible range and a large area and comprising the first stage of...
6339486 Holographic technique for illumination of image displays using ambient illumination  
An apparatus and method is disclosed for illuminating an image display with ambient light using holographic techniques. The apparatus includes a pair of holographic optical elements each having a...
6323971 Hologram incorporating a plane with a projected image  
A system and method for generating a composite display that includes at least one static three dimensional holographic image, and dynamic and/or static two dimensional images. An object hologram...
6322932 Holographic process and media therefor  
High storage densities using a holographic system are achievable using a stratified medium while maintaining a relatively high selectivity upon reconstruction of the stored images. Such...
6317227 Hologram  
A hologram has a hologram element 3 containing a photopolymer and a cover film 22 and cover plate 21 which cover its surfaces. An adhesive 1 is used for bonding the cover film to the hologram...
6317226 Dot matrix hologram for hiding a moire pattern  
A moire pattern technology about a dot matrix hologram for hiding a moire pattern is invented. In the moire pattern hidden region of a dot matrix hologram, the moire pattern foreground area and...
6309735 Subject plate for recording holograms, hologram-making method, and hologram-recorded article  
The invention provides a hologram-recording subject plate comprising a block and a variety of subjects fixedly contained therein, which ensures easy, stable yet continuous recording of a...
6291109 Hologram and method of and apparatus for producing the same  
A duplicating photosensitive material film is brought into close contact with an ND glass reduced in thickness so as to become flexible or a flexible sheet or an ND glass coated with a cushioning...
6292279 Optical system for recording or replicating hologram  
The invention provides a hologram recording or replicating optical system wherein a misalignment-with-time of the center of a laser generated beam is automatically corrected so that the color...
6288804 Positive unit magnification reflective optics for holographic storage  
A positive unit magnification reflective head is used to back-reflect a primary light beam, for storing reflection microholograms at the coincident foci of the primary and reflected beams. Imaging...
6285472 Active and passive holographic optical based curved surface elements  
Disclosed is a curved surface element (e.g., light bulb, ornament, light pipe, etc.) which has at least a portion thereof (inner or outer surface) covered with a holographic diffraction grating...
6268941 Holographic display screen with integrated speckle suppression  
A method for suppressing image speckles in a holographic screen is provided in which the screen is illuminated in the hologram in a plurality of individual steps, changing the recording parameters...
6262819 Hologram image recording apparatus and method  
A hologram-image recording method and apparatus are provided which prevents or attenuates vibrations so as to produce a bright holographic stereogram having high diffraction efficiency. Such...
6259541 Light dispersive insulated glazing unit  
A method for fabricating light dispersive insulated glazing units is provided. According to this method a substantially sealed integral unit comprising a pair of spaced glazing lites and a...
6246495 Phase-shift digital holographic apparatus  
A phase-shift digital holographic apparatus shifts the phase of a reference wave by a phase shifting means, produces holographic image data by a holographic image pickup means having an image...
6243202 Structure arrangement, in particular for a security element  
A structural arrangement having optical diffraction qualities for use as a security element in a value bearing document, such structural arrangement having a plurality of surface regions having at...
6236476 Apparatus for making a high quality reflection type holographic optical element  
An apparatus for making a high quality reflection type holographic optical element (HOE) using a single input laser beam, including a reflective mirror, a holographic photoplate having a photo...
6226110 Method and apparatus for holographically recording an essentially periodic pattern  
The present invention relates to a method and an apparatus for holographically recording periodic or quasi-periodic features of a mask in a holographic recording layer. In holographic lithography...
6198554 Method for producing a hologram and a display device using the same  
A method for producing a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, and the object light either having diffusing and...
6191875 Process for holography using reference beam having correlated phase content  
An improved process for holography is provided, in which the reference beam used for storage and readout has a correlated phase content. In particular, it was found that reference beams having...
6181446 Holographic shrink wrap element and method for manufacture thereof  
A holographic shrink wrap element containing a shrink wrap film and a layer on the shrink wrap film, wherein the layer contains a holographic image. A process for preparing a holographic shrink...
6166833 Zero-order computer generated phase-only holograms  
A method for encoding zero-order phase-only holograms, and the holograms so encoded. The amplitude and phase of each point of a discrete mathematical transform, such as a Fourier transform, of an...
6166835 Holographic memory  
Holographic memory including a beam source for emitting a beam, a beam splitter for splitting the beam into a reference beam and an object beam, a hologram memory unit for recording information...
6163390 Method for producing a hologram and a display device using the same  
A method for producing a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, and the object light either having diffusing and...
6160645 Holographic media  
A holographic medium uses a photosensitive polymer medium. The shelf life of the photosensitive polymer medium is improved by hermetically sealing the polymer between glass plates. The hermetic...
6156415 Method for fabricating a multilayer optical article and a system having a multilayer optical article  
A method for fabricating an article, comprising the steps of grasping an outer surface of a first substrate with a first holder, whereby the outer surface of the first substrate is held to an...
6157471 Display panel with compensation by holographic birefringent films  
A display panel having compensation using holographic birefringent films. Due to the natural birefringence of liquid crystals, contrast suffers when a liquid crystal cell is viewed at an oblique...
6151142 Grazing incidence holograms and system and method for producing the same  
A method and system are disclosed for recording and displaying grazing-incidence (i.e., steep reference beam angle) holograms supported on a substrate having thin edge-illuminatable geometry. The...
6151143 Methods and apparatus for making holograms including multiple two-dimensional images  
A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a...
6147782 Positive unit magnification reflective optics for holographic storage  
A positive unit magnification reflective head is used to back-reflect a primary light beam, for storing reflection microholograms at the coincident foci of the primary and reflected beams. Imaging...
6127067 Recorded volume holograms with multiple adhesive layers  
The invention provides a hologram-recording subject plate comprising a block and a variety of subjects fixedly contained therein, which ensures easy, stable yet continuous recording of a...
6124953 Wallpaper construction having a holographic border  
A decorative construction 10 for attachment to a vertical surface wherein the decorative construction 10 includes a main image unit 11 comprising a generally elongated rectangular sheet of...
6122079 Chromatically-adjusted holographically illuminated image-providing display element  
Reflective image-providing displays illuminated with chromatically-adjusted holographically diffused light are provided. In one particular and preferred embodiment, a liquid crystal display...
6097513 Holographic memory device  
A holographic memory device includes: a hologram memory part for information recording by using a reference beam and an object beam, the hologram memory part having a plurality of cells; a first...
6076732 Two-motor reflection system with hologram  
A holographic spectroscope for a two-motor reflection system for generating scanning patterns in which a light beam is first reflected by a first reflector connected to a first motor electrically...
6066378 Volume hologram laminate and label for preparing volume hologram laminate  
A multilayered volume hologram structure of the invention comprises a substrate 2 for a certificate or the like, and an adhesive layer 5, a volume hologram layer 5 and a surface protective film 7...
6043911 Optical source module with two wavelengths and optical pickup apparatus using the same  
A light source module with two wavelengths that is adapted to generate laser beams different in wavelength. In the light source module, a hologram optical element (HOE) is used to allow a first...
6038043 Method for recording a holographic optical element  
A fingerprint sensor having a holographic phase grating glued on one right angle surface of a prism is described where a light source oriented normally relative to the hypotenuse surface of the...
6038041 Three-dimensional holographic fluorescence microscope  
An optical scanning holography system which requires only a two dimensional scan to record three dimensional information from a fluorescent specimen wherein the optical scanning holography is...
6023352 Methods and systems for thermal fixing and/or erasing of holograms  
The invention features methods and systems for thermally fixing or erasing a laser-induced hologram in a photorefractive material, for example, by directing laser radiation having a wavelength...
6020090 Method for producing transparent type hologram  
Method for producing a of a transparent type hologram screen of an wide visible range. A photosensitive member and a light source of a reference light are arranged on the same side of the light...
6017657 Method for embossing holograms into aluminum and other hard substrates  
Surface relief holograms are prepared by directly impressing them into aluminum and other hard metal substrates, without the need to preheat or otherwise soften the substrate. A holographic...