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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...
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,...
5258861 Reflection type hologram scale  
A reflection type hologram scale, in which a hologram dry plate is bonded to a protecting base member in which a hologram grating formed on a scale base member forming the hologram dry plate and a...
5253086 Holographic device for combining laser beams  
A holographic recording of the interference between an object laser beam and a reference laser beam is used to combine the amplitudes of multiple input laser beams which are conjugates of the...
5240795 Volume phase type hologram film and photosensitive resin composition employed therefor  
A volume phase type hologram film has a diffraction grating recorded in a film composed mainly of poly(N-vinylcarbazole). The poly(N-vinylcarbazole) as the main component has a weight-average...
5239396 Safety application of holographic material  
A holographic diffraction media is disposed on a physical object in a highly visible position so as to enhance the human visibility of the object, and therefore the safety of humans using or...
5235442 Method for the recording and for the visual restitution of a tridimensional scene  
The invention relates to a method for the photographic recording and the visual restitution of a tridimensional scene by means of a coherent light source (1). According to the invention, in view...
5231520 Volume phase type hologram and method of manufacture thereof  
A volume phase type hologram has a diffraction lattice recorded in a poly(N-vinyl carbazole) polymer layer where the diffraction lattice is recorded throughout the thickness direction of the...
5224830 Holographically-decorated ceiling fan  
A ceiling fan includes a plurality of fan blades radially secured to a motor shaft of a driving motor of the fan, each fan blade fixed with a holographic recording plate thereon pre-recorded with...
5223357 Promotional display signage and method of manufacture  
A decorative promotional display signage and its method of manufacture includes the steps for combining the constituent elements of the signage, and the resultant combination of these elements....
5210625 Holographic efficiency adjustment  
A hologram efficiency adjusting process that includes scanning the brightness effect of a hologram, which is either the hologram to be adjusted or a hologram representative of the hologram to be...
5200618 Method and apparatus for atomic imaging  
A method and apparatus for three dimensional imaging of the atomic environment of disordered adsorbate atoms are disclosed. The method includes detecting and measuring the intensity of a diffuse...
5198913 Apparatus for displaying three-dimensional image by using Pockels readout optical modulator  
An apparatus for displaying a three-dimensional image of a plurality of tomographic images by storing pictorial information of a tomographic image in an image convering element, forming...
5194882 Keratographic instrument using holographic placido illuminator to reduce alignment sensitivity  
A hologram is used to project an image of a pattern similar to a placido upon the cornea of a subject. By viewing the reflection of the pattern in the subject's cornea, one may measure the...
5193014 Metal vessel having hologram of diffraction grating formed thereon  
The metal vessel of the present invention is characterized in that a relief type hologram or relief type diffraction grating is formed on at least a part of the vessel by coining. By forming this...
5192867 Electron optical measurement apparatus  
In an electron holography apparatus having an electron source, a specimen holder, an electron lens system, and an electron biprism, the electron biprism is so constructed as to be rotatable about...
5191448 Photorefractive square law converter  
A photorefractive device is provided for converting an image-bearing incoherent input beam to a high contrast coherent output beam the intensity of which varies as the square of the input...
5189532 Edge-illuminated narrow bandwidth holographic filter  
This invention concerns a method and apparatus of using the relatively thin holographic material of a transmission holographic optical element in such a manner whereby a narrow spectral bandwidth...
5189531 Hologram production  
Holograms are formed in moldable materials of varied shapes and curvatures utilizing injection molding and the like. Instead of the conventional metallizing, there can be sprayed on flakes of...
5182180 Dry film process for altering the wavelength of response of holograms  
The process is disclosed for altering the wavelength response of a volume phase reflection hologram by contacting the hologram with a diffusion element containing a monomer. Monomer in the...
5182780 Optical backplane interconnecting circuit boards  
A system for interconnection of a stack of circuit boards, wherein each of at least a plurality of the circuit boards has an end region carrying one or more light transmitters or light receivers,...
5173724 Optical system which helps reduce eye strain  
An optical system which contains multiple images comprised of two or more images at varying focal distances, which when viewed consecutively and in repetition will exercise the ciliary muscle of...
5172250 Hologram scale having moisture resistance  
A hologram scale having a base substrate, a hologram film with a diffraction grating of a desired pitch exposed thereon, adhered to the base substrate, and with a protective substrate to protect...
5166813 Optical evaluation using a hologram barrier filter  
Optical detection apparatus and process which, in its optimum configuration, utilizes holographic optical elements both as a dichroic beamsplitter and as a selective notch-type barrier filter to...
5164847 Holographic element  
A transmission holographic element (30) comprises a holographic material (330) deposited onto a substrate (31) to form a composite substrate structure. The substrate (31) is coated with a mirror...
5159473 Apparatus and method for programmable optical interconnections  
A programmable optical interconnection apparatus and method in which a plurality of spatial light modulators (SLM) form a plurality of spatially modulated beams from a data signal. A hologram is...
5155604 Coated paper sheet embossed with a diffraction or holographic pattern  
A decorative substrate consisting of a paper base sheet coated with a thermoplastic material, involving a novel technique for coating and embossing the substrate. The paper sheeting is supplied...
5151798 Hologram scale  
A hologram scale is comprised of a hologram grating plate in which a hologram grating is formed, and a protecting substrate on which an origin and/or fixed point detecting scale of the hologram...
5142384 Holograms for packaging and display uses  
An article has a light-transparent visual display feature through which a graphic design or a solid object can be seen, the light-transparent visual display feature is a light-transparent film...
5142385 Holographic lithography  
First and second coherent beams illuminate a common area on an exposure station. A phase detector senses the relative phase between the first and second beams to provide a control signal. There is...
5124815 Method for forming holographic optical elements free of secondary fringes  
Holographic optical elements relatively free of unwanted, secondary fringes are produced using light having a limited coherence. A photosensitive material of a predetermined thickness records the...
5120621 Holographic exposure method and apparatus  
This invention relates to a method and apparatus for exposing a photosensitive film on a holographic plate to fabricate a reflective holographic optical element. The apparatus incorporates...
5121229 Self-contained compact multi-color edge-lit holographic display  
A three-step process is combined with an edge-lit system to provide a self-contained, maximally-compact holographic display. In one embodiment, a hologram is affixed to an upstanding transparent...
5121227 One step rainbow holography  
Improved optical holographic apparatuses are disclosed for making white light viewable rainbow holograms in one step utilizing concave mirror optics. On-axis and off-axis configurations are...
5109289 Holographic display with programmable area highlighting  
Highlighting a selected area of a holographic display indirectly by selectively repositioning a small lens within the hologram illumination beam.
5101193 Universal stand-alone holographic center high mounted stoplight  
A holographic stoplight for a vehicle including a stoplight hologram, a source of playback illumination, and a transparent prism for supporting the stoplight hologram and for guiding the playback...
5095375 Holographic combiner edge seal design and composition  
The present invention comprises hologram combiners that incorporate one of several compositions of material to seal their perimeters and prevent the hologram from being attacked by water. The...
5093802 Optical computing method using interference fringe component regions  
A fundamental method and apparatus for using wave-type energy, such as light, to provide: amplification, energy control, and logic functions including OR, EXCLUSIVE OR, and INVERTER; as well as:...
5090789 Laser light show device and method  
A laser light show device and method produces a surface projected or suspended holographic image, and includes multiple image projectors. One image projector provides the object image information...
5087510 Electrolessly deposited metal holograms  
Electrolessly deposited metal holograms comprising a polymeric substrate having a holographic relief-patterned surface and a metal reflective layer electrolessly deposited to conform to and...
5083219 Method and apparatus for recording Lippman holographic mirrors  
An apparatus for recording Lippman holographic mirrors comprises an exposing volume optically coupled on one side with an index-matching fluid to the holographic material to be recorded. The...
5081540 Holographic apparatus using incoherent light  
A holographic apparatus of the type comprising a conoscopic system including a birefringent crystal inserted between two polarizers, wherein the apparatus also includes an aperture angle limiter...
5081541 Incoherent light holographic method and apparatus for studying ground relief  
A holographic method of the type implementing a conoscopic system including a birefrigent crystal inserted between two polarizers and a photosensitive element, wherein the method includes a step...