Matches 51 - 100 out of 235 < 1 2 3 4 5 >
Match Document Document Title
6753989 Recording surface relief microstructure  
A method of recording a surface relief microstructure in a record medium includes: i) causing a coherent reconstruction or replay beam to impinge on a holographic optical element assembly, the...
6721076 System and method for reflective holographic storage with associated multiplexing techniques  
A method and system of recording successive holograms in a recording medium including a reflective substrate layer, a polarization shifting layer, and a photorecording medium layer is presented. A...
6720549 Device for controlling an optical signal modulation frequency, and in particular for controlling microwave or millimetric modulation frequency  
A device for monitoring a modulation frequency of an optical signal,—in particular a device for monitoring the modulation frequency of an optical signal modulated at a microwave or millimetric...
6709790 Method and apparatus for generating periodic structures in substrates by synthetic wavelength holograph exposure  
A substrate surface 10 having a photo-sensitive material surface thereon is simultaneously exposed to four plane waves of light at angles of incidence θ, −θ, φ and −φ subtending from the...
6700686 System and method for holographic storage  
The present invention provides a solution to the needs described above through a system and method for holographic storage. The system comprises a laser light source, a first beam splitter for...
6697180 Rotation correlation multiplex holography  
Holography in which an array of overlapping holograms is recorded or reconstructed in a recording medium, holograms being produced by interference of a reference beam and a signal beam, in which...
6639699 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...
6636665 Grating writing system  
A method of forming a complete grating structure on a photosensitive waveguide is disclosed comprising the steps of: (a) writing an initial portion of the grating structure on the waveguide; (b)...
6621530 Projection televisions with mirrors incident on holographic screens  
A projection television has a screen with a three dimensional hologram on a film substrate for collecting light over a range of incident angles and redirecting the light more nearly forward....
6614565 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...
6571043 Large screen fiber optic display with high fiber density and method for its rapid assembly  
This invention encompasses a method for the manufacture and rapid assembly of large screen fiber optic displays ( 1, 2 ) containing a very large number of individual fibers (thousands to hundreds...
6567576 Optical switch matrix with failure protection  
The present invention relates to a multi-stage non-blocking optical switch matrix having failure protection. The optical switch includes failure protection in the form of a capacity to provide an...
6552830 Holographic authentication element and document having holographic authentication element formed thereupon  
Device, method, and system for recording diffractive high resolution text, pictorial, and/or other graphical information is provided which is particularly suited to recording information that would...
6501571 Three-dimensional holographic stamping of multi-layer bit-oriented non-linear optical media  
A master hologram is generated in a first optical medium by use of a plurality m of different reference beams, each beam bearing information suitably recorded in one or more of a plurality n layers...
6486982 System for making a hologram of an image by manipulating object beam characteristics to reflect image data  
A system for converting an image into a hologram formed from diffraction gratings includes obtaining image data for each pixel in an image to be converted, putting it into digital form and using...
6441947 Method and apparatus for optical beam steering based on a chirped distributed bragg reflector  
An optical beam steerer includes one or more layers of electro-optically active material in which is formed a chirped distributed Bragg reflector. An electric field generated across the...
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...
6396985 Contoured large screen display apparatus  
An apparatus for use in contoured architectural milieus includes a contoured large screen display having a mounting means to which modular flat display tiles including, tiles of diverse or...
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...
6331904 Reflection optics reference beam telescope  
A reference beam telescope, which is also referred to as a relay imaging system for a reference beam, using reflection optics is disclosed. The relay imaging system according to the present...
6330088 Method and apparatus for recording one-step, full-color, full-parallax, holographic stereograms  
The present invention concerns methods and devices for creating and printing variable size and variable resolution holographic stereograms and holographic optical elements using computer rendered...
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 combination...
6307854 Telecommunications switch  
A self-routing switch such as a Banyan switch has a controller which recognizes incoming routing requests which would give rise to blocking in the switch and makes and optimum selection of queued...
6304703 Tiled fiber optic display apparatus  
A fiber optic display apparatus consists of a plurality of optical fibers which convey a projected image from an input, or first surface, to a display, or second surface, whose area is greater than...
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...
6285474 Holographic recording method and filtering method  
A method and an apparatus capable of filtering based on desired spatial frequency characteristics without loss of Fourier spectrum frequency components, and of matched filtering of high recognition...
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...
6262818 Method for simultaneous amplitude and quantitative phase contrast imaging by numerical reconstruction of digital holograms  
A method for the numerical reconstruction of digital holograms which allows simultaneously amplitude and quantitative phase contrast imaging. The reconstruction method computes the propagation of...
6246496 Photorefractive device for controlling information flow  
Three separate input beams of light can be combined in a photorefractive material and outputs one signal. Each of the three input beams can carry information, for example, by passing each input...
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...
6211848 Dynamic holographic video with haptic interaction  
A user is able to interact with and modify an electronic holographic image using a force-feedback (or haptic) device, which is capable of sensing and reporting the 3D position of its hand-held...
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...
6178019 System and method for controlling the selectivity of a holographic memory system  
A system and method for controlling the selectivity function in a holographic memory system that permits more rapid location and retrieval of holographically stored data. The system and method...
6172777 Optical interconnection for holographic memories and method for using the same  
An optical interface of a holographic memory system electrically selects one of several optical pathways to store or retrieve an image from a holographic memory by activating liquid crystal...
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...
6163391 Method and apparatus for holographic data storage  
We disclose apparatus for holographic recording of information. The apparatus includes a lens or lens system, referred to here as the "FT lens," situated in such a way that light from an object...
6115151 Method for producing a multi-layer holographic device  
A method of making a holographic device comprising sensitizing a plurality of layers and stacking the layers to form a composite structure. Each layer is sensitized to at least one color...
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...
6028686 Energy-depleted radiation apparatus and method  
A generator of energy-depleted radiation and various methods and applications using the energy-depleted radiation. Various embodiments are disclosed of the energy-depleted radiation generator and...
6023355 Coded-wavelength multiplex volume holography  
A method for coded-wavelength multiplexing according to which a signal waves S i (r) is recorded in a holographic medium in a counter-propagating geometry using corresponding writing reference...
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...
6016210 Scatter noise reduction in holographic storage systems by speckle averaging  
A method and an apparatus for increasing detection signal-to-noise ratio, while reading out a hologram from a holographic storage medium, are disclosed. The hologram is written by interfering a...
6005666 Apparatus for and method of optical inspection in total internal reflection holographic imaging system  
Apparatus for and a method of optical inspection in a total internal reflection holographic imaging system. Multi wavelength laser beams are directed onto a prism supporting a first substrate...
5989923 Hologram containing sensor  
The invention relates to a sensor (9) comprising a hologram (17) supported on or within a holographic support medium (10). A species to be detected is reactive with a substance disposed throughout,...
5986781 Apparatus and method for generating diffractive element using liquid crystal display  
Device, method, and system for recording diffractive high resolution text, pictorial, and/or other graphical information is provided which is particularly suited to recording information that would...
5978112 Non-volatile readout of shift multiplexed holograms  
The present invention is a holographic reconstruction device for reconstructing successive holograms previously recorded by a recording reference beam in a recording medium, each previously...
5963346 Scatter noise reduction in holographic storage systems by two-step write  
A method and an apparatus for increasing detection signal-to-noise ratio of a holographic image by compensating for noise characteristics of a holographic storage medium are disclosed. The method...
5959747 Compact architecture for holographic systems  
An architecture for holographic data storage and processing integrates multifunctional silicon-based optoelectronic devices, rewritable holographic material, optical devices and other...
5949558 Holographic storage using shift multiplexing  
The invention is embodied in a method of recording successive holograms in a recording medium, using at least a fan of M waves along at least a first axis with a separation angle between adjacent...
5946115 Hologram memory device  
Fast speed hologram memory device, including a first holographic optical element array for directing a reference beam to a desired hologram memory cell directly and a second holographic optical...
Matches 51 - 100 out of 235 < 1 2 3 4 5 >