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5315423 |
Wavelength multiplexed two dimensional image transmission through single mode optical fiber
An apparatus and method are provided for transmitting two-dimensional images through a single mode optical fiber. Light from a broadband source is dispersed into component wavelengths, spatially...
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5313292 |
Windshield display system for an automobile
A windshield display system for automobile includes a wavelength selective holographic combiner (12) laminated within the plies (36, 50) of an automobile windshield. A lamination process is...
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5303129 |
Lamp arrangement for motor vehicle
A light arrangement in the form of a center high mounted brakelight is shown. A surface light source disposed below a rear window of the vehicle and includes a plurality of diverging light sources,...
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5300169 |
Transfer foil having reflecting layer with fine dimple pattern recorded thereon
A method wherein a hologram is transferred from a transfer foil formed with a fine dimple pattern and having a reflecting layer, and information, e.g., an image or a character, other than...
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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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5291317 |
Holographic diffraction grating patterns and methods for creating the same
Methods for creating a plurality of holographic diffraction grating patterns in a raster scan fashion. In accordance with the method, the desired pattern is made up of a large plurality of...
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5291316 |
Information display system having transparent holographic optical element
An information display system has a display screen which is substantially transparent to a selected band of wavelengths of light and can be mounted on a window. A projector projects an image of...
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5274479 |
Mirror alignment and/or figure sensing with surface mounted holographic optical elements
A procedure for supplying a mirror (22), such as the mirror of an astronomical telescope (60), with holographic optical elements (38), suitable for use with an active mirror alignment system such...
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5274478 |
Displayer with holograms
A displayer for use in a computer comprising a main body, a CRT mounted in the main body and generating an image in an electromagnetic beam, a pair of holograms for projecting the image from the...
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5272690 |
Hologram element system
A hologram element receives a first and second laser beams at a first angle relative to one another. The hologram element emits the laser beams at a second angle relative to one another. The second...
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5272550 |
Hologram system
A first volume hologram diffracts a portion of the beam of light as a first beam and transmits the remaining portion of the beam of light as a second beam. A second volume hologram diffracts either...
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5267060 |
Reflective color light filter and method of manufacture
A color matrix display including a color matrix reflective filter (10) having groups of reflective red, green and blue (R, G, B) color elements (12) arranged in subgroups (20). The elements (12) of...
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5267061 |
Non-interfering viewing systems for use in catadioptric projection systems
Selective light-transmitting filters for use with catadioptic area-of-interest display projectors and projection system provide complementary filters for two or more persons. One of the...
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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...
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5253935 |
Couples for terminating optical fiber ends
An optical fiber transmission network for transmitting voice, data, or video signals between telecommunication units includes optical couplers which bend an optical fiber at a location in close...
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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...
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5243449 |
Ambient turn-on suppression hologram
A guard hologram blocks ambient turn-on of an image hologram. In a center high-mounted rearview stoplight assembly, a guard hologram is used to prevent ambient turn-on by the sun and still allow...
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5243450 |
Optical mixer for helmet visual display system
An optical mixer for use in a helmet visual display system including a light intensifier tube for night vision and a cathode-ray tube for the display of a synthetic image. The mixer includes a...
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5235441 |
Holographic lenses
A method of constructing holographic lenses for correction of a person's deficiencies comprises splitting a filtered laser beam onto an object under consideration and thence to a photographic film,...
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5233444 |
Focus error detecting apparatus
A focus error detecting apparatus in which a light emitting and receiving element including a light emitting portion and light receiving portions all of which are formed in a common semiconductor...
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5231277 |
Optical scanner using plannar reflecting holograms
An optical scanner suitable for use with a bar code reader includes a light source for generating a laser beam, a laser beam scanning device, a scanning pattern generating optical system, and a...
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5229871 |
Optical data link for communicating data between a stationary member and a rotating member and an X-ray computer tomography apparatus incorporating the same
A method and apparatus for optically communicating data between a stationary member and a rotating member, wherein a transmitter, disposed on the rotating member, is provided for transmitting an...
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5227897 |
Reproduction of holograms
A multidimensional, visually readable, diffractive surface grating such as a hologram is reproduced by providing a master grating, generating a negative image plate from the master grating for...
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5224198 |
Waveguide virtual image display
A waveguide virtual image display including image generation apparatus providing a real image at an inlet of an optical waveguide. The real image being reflected a plurality of times within the...
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5221977 |
Laser radiation protection system
A viewing window is equipped with a selective attenuator for a harmful incoming laser beam. The attenuator principally employs a holographic optical element which selectively deflects the laser...
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5212375 |
Camera focus detection system using holographic beam splitter
An imaging system having a focus detecting device performs focus detection by detecting an output signal indicative of intensity distribution of light derived from a light-receiving element, in...
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5198911 |
Holographic optical notch reflectors
A new method for making holographic notch filters in the near infrared spectral region is disclosed. This method utilizes lthe nonlinearity in the response function of holographic materials. When a...
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5196951 |
Reflection holograms without transmission ghosts
A reflection hologram structure including a transparent substrate, and a pattern of shielded hologram containing regions and transparent regions disposed on the transparent substrate, the pattern...
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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...
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5187600 |
Apparatus for scanning an optical recording medium with a beam of light
An optical beam scanning apparatus including a semiconductor laser, a first lens which converts a divergent beam to a parallel beam, a liquid crystal display for two-dimensionally modulating the...
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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,...
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5179630 |
Laser protection window with tilted modulated index of refraction filter elements
The present invention is a technique for construction of a laser protection window providing broadened angular protection. Plural modulated index of refraction filter elements are constructed to...
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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...
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5170222 |
Measurement of spectra
A dual beam spectrophotometer has a blazed concave reflective grating 25, formed using the interference fringes of a coherent light beam reflected back from a spherical convex mirror 73 having a...
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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...
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5162927 |
High efficiency holograms by multiple-layer holography
A method is disclosed for forming a multi-layer holographic device 22. A first hologram is formed on a major surface of a substrate 14. The first hologram is desensitized to prevent interaction...
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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...
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5152962 |
Immunoassay apparatus
An assay apparatus employing total internal reflection of excitation radiation at the interface between a replaceable optically conductive assay device and a surrounding liquid phase containing the...
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5153670 |
Holographic Lippmann-Bragg filter in a spectroscopic system
A holographic filter comprises a volume hologram recorded with Bragg surfaces for use in spectroscopic and spectral splitting applications. The Bragg planes in the holographic filter can be...
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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...
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5138470 |
Guard holograms
A head-up display for a vehicle, including a primary image reflection hologram supported by a transparent substrate located in the vehicle operator's field of view for the ambient scene in front of...
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5130512 |
Fabrication of optical components utilizing a laser
A method for fabricating optical components in the cladding of an optical fiber bus by the utilization of a laser. An excimer laser fabricates either an optical coupler opening or an optical mode...
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5130825 |
Arrangement for graphic representation using holographic foils
An arrangement for graphic representation using holographic foils includes a holographic prism foil. In order to obtain holographic images, a diapositive is held at a distance from the holographic...
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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...
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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...
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5112121 |
Display system for multiviewer training simulators
A display system is disclosed which employs multiple holographic elements for selectively reflecting images from separate projectors to one or more distinct viewing volumes. The display system...
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5109427 |
Fingerprint recognition device using a hologram
A fingerprint recognition device is disclosed which is capable of making a more definite fingerprint recognition by using a hologram. The device includes a laser for emitting light, a collimator...
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5106174 |
Ideal distribution CHMSL hologram with double exposure technique
A hologram that diffracts playback illumination over a wide angular range made pursuant to a technique that includes the steps of first exposing a volume hologram recording medium to record a first...
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5103324 |
Method for fabricating holographic filters
A method for generating holographic optical elements such as power spectrum filters is carried out using a printer and a computer. A signal function is input into the computer and traced by the...
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5103323 |
Multi-layer holographic notch filter
A holographic member for a helmet visor comprising a first holographic layer having planes of diffraction oriented in a first direction in a given local area is disclosed. A second holographic...
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