Matches 51 - 100 out of 438 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
6994938 Exposure method for producing a hologram mask  
Methods for producing a hologram mask approximating the exposure produced by a non-holographic phase shifting photo mask are disclosed. One such method exposes a hologram recording material to a...
6987591 Volume hologram  
A volume hologram for modifying a characteristic of an input microwave beam and a method for manufacturing thereof are disclosed. The hologram is fabricated from a multi-layer artificial dielectric...
6982817 Method, device and laser system for producing screen holograms, and screen hologram  
In a method of producing video screen holograms, a real video screen is illuminated by means of a narrowband light for producing a hologram of the real video screen. A plurality of individual...
6940653 Radiation conditioning system  
A holographic imaging system and method includes a radiation source for generating radiation. A data base has a set of elements, each element is indicative of a trajectory of a light ray exiting a...
6930811 Holographic printer  
A single method and apparatus for producing many of the most common types of hologram from digital data is disclosed. The data are generated entirely by a computer as a 3-D (animated) model or from...
6900914 Optical information recording and reproducing apparatus having volume holographic memory  
A description is provided of an optical information recording and reproducing apparatus having a volume holographic memory. The apparatus is capable of recording an interference pattern in the...
6894814 Optical filter employing holographic optical elements and image generating system incorporating the optical filter  
The present invention relates to a solid state filter used in sequentially illuminating an image display, directly or indirectly, with first, second, and third bandwidth light. The solid state...
6885484 Optical system and method for fabricating a holographic optical element  
A simple, compact optical system is provided that includes a transmissive optical element and a HOE but that nevertheless does not require an extra optical element for the correction of chromatic...
6876474 Method for tracking particles and life forms in three dimensions and in time  
A method for tracking particles and life forms in three dimensions and in time. The present invention applies a numerical reconstruction approach to digital in-line holographic microscopy images in...
6876473 Device with anti-counterfeiting diffractive structure  
An optical device for security and anti-counterfeit applications comprises a diffractive structure comprising a discrete region that in response to white light illumination generates an image by a...
6865002 Image exposure-recording device and image exposure-recording method  
An image exposure recorder for exposure-recording a holographic stereogram image or a hologram image on a recording medium for hologram. The recorder has an inverse correction system for rotating...
6865001 System and method for encoding and decoding an image or document and document encoded thereby  
Holographic and diffractive security devices and documents carrying security devices as well as system, apparatus, and method for making and using security devices. Security devices provide at...
6850346 Method and apparatus for storing and retrieving a sequence of digital page data  
In a storing mode of an apparatus for storing and retrieving a sequence of digital page data, a first/second complex reference beam and a modulated signal beam converge on a storing location to...
6850345 Sandwich holographic disk construction with thin molded substrates  
In one embodiment, holographic data storage medium includes a first thermoplastic substrate portion having a thickness less than approximately 2 millimeters and a second thermoplastic substrate...
6844949 Method and apparatus for storing and retrieving digital page data  
In a storing mode of an apparatus for sequentially storing and retrieving digital page data, a first and second complex reference beams and a modulated and second signal beams converge on a...
6842272 Hologram plate and its fabrication process  
The invention provides a hologram plate which is used with the double-focus replication process, and which is integrated with a spacer to impart marring resistance thereto, and is integrated with a...
6842271 Rain sensor, in particular for a motor vehicle  
A rain sensor for a motor vehicle, having a transmitter emitting radiation, a receiver, and a holographically embodied diffractive element that has a linear-grating-like structure.
6825959 Holographic viewing device, and computer-generated hologram for the same  
The invention relates to a holographic viewing device that has a high diffraction efficiency, enables bright patterns with less noticeable conjugate or higher-order images to be viewed in place of...
6822772 Holographic display  
The invention relates to a holographic display for storing and reducing a spatial structure, having a holographic screen forming the master hologram, and having a projection device which...
6816291 Optical information recording and reproducing apparatus having volume holographic memory  
A description is provided of an optical information recording and reproducing apparatus. The apparatus comprises: a holographic memory made of a photorefractive crystalline material; a support...
6813048 Computer-generated hologram fabrication process, and hologram-recorded medium  
A computer-generated hologram fabrication process that enables a plurality of original images to be observed with master-slave relations Original images 11, 12 , a recording surface 20 and...
6808271 Projection type display apparatus  
In order to achieve a great improvement in light utilizing efficiency, a projection type display apparatus for obliquely projecting an original image onto a screen includes a first projection...
6798547 Process for holographic multiplexing  
A method of recording holograms includes: generating a first signal-beam from a signal-beam source and a first reference beam from a reference-beam source; recording a first hologram in a...
6788443 Associative write verify  
Associative retrieval techniques of this invention allow a holographic recording device to simultaneously query a plurality of storage locations for the presence of a given data pattern. The...
6771402 Method and apparatus for generating a hologram  
A method and system for generating a hologram include a computer ( 104 ) connected to a printer ( 108 ). A mathematical description ( 102 ) of an object, including for example the physical...
6762865 Self-referenced holography using diffusive element  
The invention is directed to self-referenced holographic recording techniques that make use of a diffusive element. Self-referenced holography refers to holographic recording techniques in which a...
6760135 Holographic displays  
A holographic display comprises a source of coherent light and an Electrically Addressable Spatial Light Modulator (EASLM) in the path of the light source. The EASLM is arranged in use to be driven...
6760134 Multicolor electronic holography and 3D image projection system  
A three dimensional true color holographic imaging system using three primary color Fresnel-Zone-Pattern laser generators combined as a single beam that scans the target and the reflections of...
6753990 Holographic displays  
A holographic display comprises a light source and an Electrically Addressable Spatial Light Modulator (EASLM) 1 in the path of the light source. A light guide is arranged to guide light from the...
6747770 Holographic stereogram exposure apparatus, method thereof, and holographic stereogram generation system  
An illuminating optical system 36 evenly spreads an object beam L 3 split from a beam splitter 34. When a control computer sends a number of images in the parallax direction, a spatial light...
6731991 System for projecting light on a work surface to produce an image for tracing  
A method and system of projecting light on a planar surface to produce an image for tracing is disclosed. The system includes a projector that has a light source and a signal conditioner that is...
6731416 Holographic privacy filter for display devices  
A privacy filter for use on an electronic display screen, such as a PDA display screen or a laptop display screen, is constructed using holographic imaging technology. The privacy filter consists...
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...
6714329 Hologram plate and its fabrication process  
The invention provides a hologram plate which is used with the double-focus replication process, and which is integrated with a spacer to impart marring resistance thereto, and is integrated with a...
6714327 Use of a holographic video screen as a display surface in a vehicle  
The use of a holographic video screen which appears black, gray or colored in ambient light as the display surface in a vehicle, wherein a driver can view the screen while driving without taking...
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...
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...
6687031 Holographic display element and method of making the same  
A holographic display element for three-dimensionally displaying a three-dimensional model and a plane image, for example, in a superimposed manner, which is prevented from causing a change in...
6687030 Method and apparatus for illuminating a display  
Disclosed is a device for producing colored light and an image generating apparatus including such a device. The device includes a switchable light-directing apparatus configured to receive light...
6678078 Optical filter employing holographic optical elements and image generating system incorporating the optical filter  
The present invention relates to a solid state filter used in sequentially illuminating an image display, directly or indirectly, with first, second, and third bandwidth light. The solid state...
6674556 Image reconstructing apparatus, hologram forming method, hologram and hologram sheet  
In an image reconstructing apparatus 10 for reconstructing a hologram, when a lid 11 is nearly upright in relation to an apparatus body 12 , a light emitted from an illumination light source ...
6674555 Method and apparatus for holographic data storage  
Apparatus for holographic recording of information includes a lens or lens system, referred to here as the “FT lens,” situated in such a way that light from an object beam enters the FT lens...
6674554 Apparatus for making holograms including images of particular sizes  
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...
6667819 Reflection type diffuse hologram, hologram for reflection hologram color filters, etc., and reflection type display device using such holograms  
A reflection type color display device and a reflection type of direct-view color display device are provided. The reflection type color display device includes a spatial light modulator having a...
6661548 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...
6646772 Holographic illumination system  
Disclosed is an apparatus and method of illuminating an image display via an electrically switchable holographic optical element. The method includes a first electrically switchable holographic...
6639700 Hologram recording medium, hologram recording/reconstructing apparatus, and hologram recording/reconstructing method  
A hologram recording medium comprises a hologram recording layer for recording a hologram, and a wedge substrate for varying the propagating direction of a reference light and an object light...
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...
6636336 Apparatus for making holograms including means for controllably varying a beamsplitter  
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...
6631016 Full-parallax holographic stereograms on curved substrates  
The current invention comprises the recording of full parallax, one-step, full color holographic stereograms so as to properly display the resultant imagery when the hologram is mounted on a curved...
Matches 51 - 100 out of 438 < 1 2 3 4 5 6 7 8 9 >