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7418170 |
Optical device and virtual image display device
A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device...
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7400431 |
Method for encoding video holograms for holographically reconstructing a scene
A method and a device for encoding and reconstructing computer-generated video holograms using a conventional LC display: it provides holographic reconstruction of three-dimensional scenes using...
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7379219 |
Method and apparatus for illuminating a computer generated hologram
A holographic display comprising a spatial light modulator, SLM, for displaying a computer generated hologram, CGH, containing horizontal or vertical parallax only, HPO, means for illuminating the...
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7376068 |
Nano-scale resolution holographic lens and pickup device
An extremely high resolution holographic lens is provided, comprising an interference pattern between light emitted from at least one tiny point source of light such as the tip of an optical fiber,...
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7317564 |
Replay optics for holographic displays
A holographic display comprises a spatial light modulator, SLM, arranged to display a set of tiled holographic images, and illuminating means for illuminating a surface of the SLM. Replay means are...
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7312908 |
3D image display and 3D image display method
A small, inexpensive three-dimensional image display having a structure for displaying a color three-dimensional image sharply even if a low-resolution spatial optical modulating element is used....
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7298685 |
Method and apparatus for recording to and reading from a multi-layer diffractive optics memory
The present invention comprises an apparatus and method for recording information on a multi-layer diffractive optics memory to extend storage capacity. A composite mirror device comprises a...
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7289255 |
Hologram apparatus, positioning method for spatial light modulator and image pickup device, and hologram recording material
The present invention provides a hologram apparatus for recording interference fringes formed from reference light and signal light optically spatially modulated by a spatial light modulator on a...
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7262889 |
System and method for volume holographic imaging using spectral illumination
A holographic imaging system is disclosed that includes a spectral electromagnetic field unit for providing a plurality of focal areas of a plurality of wavelengths of electromagnetic fields along...
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7259899 |
Narrow angle hologram device and method of manufacturing same
A method of manufacturing a master for producing a hologram device. A first master is produced with a compensating angle. The second master is produced from the first master with an index matching...
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7248389 |
Holographic recording and reconstructing apparatus and holographic recording and reconstructing method
A holographic recording and reconstructing apparatus includes a laser light source for emitting a laser beam, a beam splitting element for splitting the emitted laser beam into a signal beam and a...
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7230747 |
Hologram retention method
Information recorded as a hologram in a predetermined position of an optical recording medium is reproduced, and subsequently the reproduced information is re-recorded and retained in the same...
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7221490 |
Holographic method with numerical reconstruction for obtaining an image of a three-dimensional object in which even points out of the depth of field are in focus, and holographic apparatus using such a method
A holographic method with numerical reconstruction for obtaining an image of a three-dimensional object, employs a digitalized hologram of an object or of a portion thereof, and includes starting...
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7215451 |
Reflection type diffuse hologram, hologram for reflection hologram color filters, etc., and reflection type display device using such holograms
A method of fabricating a hologram having a pattern made up of pixels in which a photosensitive material for forming a hologram is stacked on either a reflection-type hologram or a transmission...
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7209269 |
Displaying holographic three dimensional images
Holographic three dimensional images of objects can be displayed via a device comprising micro holographic optical elements (MHOEs). A device for displaying holographic three dimensional images of...
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7199912 |
Fourier transform lens system and holographic storage system using same
A Fourier transform lens system includes: a first lens group having negative power and a second lens group having positive power disposed at one side of the first lens group with the first lens...
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7161722 |
Holographic printer
A holographic printer is disclosed which produces an intermediate hologram H3 and uses the intermediate hologram H3 to produce a white light viewable hologram H2.
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7158274 |
Pick-up apparatus for digital storage medium
In order to pick up a digital storage medium including a holographic storage medium and a reflective storage medium, a first and a second beam each of which has a different wavelength are used and...
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7154647 |
Color hologram display and its fabrication process
The invention relates to a color hologram display an image of a three-dimensional object and a hologram image of a pattern of plane characters, images or the like are recorded in the same volume...
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7081977 |
Angular multiplexing apparatus for holographic storage medium
An angular multiplexing apparatus for a holographic storage medium. The angular multiplexing apparatus includes a reconstructing reference beam generator, translated in parallel to a number of...
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7068403 |
Computer-generated hologram
A computer-generated hologram comprising a plurality of cells. The hologram has information recorded therein, the information operable to recreate a stereoscopic image of an object. At least one of...
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7054045 |
Holographic human-machine interfaces
A holographic HMI allows data and commands to be entered into electronic equipment. The HMI involves no tangible physical contact between the human operator and the control elements because the...
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7046405 |
Computer-generated hologram fabrication process, and hologram-recorded medium
A computer-generated hologram fabrication process which reduces loads on computation of interference fringes for an original image including micro-characters. A visually perceivable original image...
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7038787 |
Content-based fused off-axis object illumination direct-to-digital holography
Systems and methods are described for content-based fused off-axis illumination direct-to-digital holography. A method includes calculating an illumination angle with respect to an optical axis...
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7019874 |
Holographic memory system including a photodetecting device provided with a band-pass filter
A holographic memory system includes a light source for generating a reference beam having a wavelength; and a photodetecting device for selectively detecting a reconstructed signal beam...
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6999214 |
Apparatus and method for detecting holographic data reproduced from a holographic media
In an apparatus for detecting holographic data reproduced from a holographic medium, the holographic medium has an interference pattern and the holographic data is reproduced when a first portion...
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6980338 |
Image-reproducing apparatus and image-reproducing method
An optical member 7 is bonded, at its rear side 7 b , to a holographic stereogram 6 . The front side 7 a of the optical member 7 consists of parallel triangular prisms. Illumination light ...
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6977761 |
Image-reproducing apparatus and image-reproducing method
An optical member 7 is bonded, at its rear side 7 b , to a holographic stereogram 6 . The front side 7 a of the optical member 7 consists of parallel triangular prisms. Illumination light ...
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6975440 |
Image-reproducing apparatus and image-reproducing method
An optical member 7 is bonded, at its rear side 7 b , to a holographic stereogram 6 . The front side 7 a of the optical member 7 consists of parallel triangular prisms. Illumination light ...
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6961159 |
Holographic viewing device, and computer-generated hologram for the same
The invention relates to a holographic viewing device that enables a given pattern to be properly viewed in place of light sources in a scene and is easy to fabricate and assemble with consistent...
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6952295 |
Hologram screen and hologram display
A hologram screen 1 displays an image by diffracting and scattering image light 31 projected from an image projection apparatus 2 . An upward/downward light scattering device 13 , which...
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6943924 |
Apparatus and method for digital holographic imaging
The present invention is related to a method for performing digital holographic imaging (DHI), said DHI being characterized by the fact that images of a sample are obtained by applying numerical...
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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...
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6924912 |
Holographic screen
A holographic screen for displaying images by diffracting and dispersing an image beam projected by an image projector comprises a main hologram for diffracting and dispersing an incident image...
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6903852 |
Image-reproducing apparatus and image-reproducing method
An optical member 7 is bonded, at its rear side 7 b , to a holographic stereogram 6 . The front side 7 a of the optical member 7 consists of parallel triangular prisms. Illumination light ...
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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...
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6873444 |
Volume holograms in transparent materials
This invention discloses a method of producing, in a solid transparent material ( 3 ), a hologram of an object; the method includes the steps of: developing a three-dimensional mathematical model...
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6862120 |
Hologram recording medium, hologram recording method and hologram recording and reproducing apparatus
In a hologram recording method for forming a plurality of areas of a refractive index light interference pattern of a coherent signal light beam in accordance with information data within a...
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6856434 |
Image reproducing apparatus and image illuminating apparatus
Angle of incidence of reproducing light with respect to a hologram or a holographic stereogram is adjusted so that a reproduced image can be repetitively viewed without requiring the viewer to move...
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6831762 |
System and method for holographic storage with optical folding
A system for recording and reading out holograms in a storage medium including a pattern encoder, a first fourier transform lens with a focal length f 1 , a second fourier transform lens with a...
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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...
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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...
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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...
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6809845 |
Phase imaging using multi-wavelength digital holography
The present invention is a phase-imaging technique by digital holography that eliminates the problem of 2π-ambiguity. The technique is based on a combination of two or more digital holograms...
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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...
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6757087 |
Optical display
An optical display provided with a hologram element and a light source, wherein the hologram is a reflection hologram formed by a light beam which is obtained by utilizing light passing through a...
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6747771 |
Off-axis illumination direct-to-digital holography
Systems and methods are described for off-axis illumination direct-to-digital holography. A method of recording an off-axis illuminated spatially heterodyne hologram including spatially heterodyne...
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6738170 |
Image-reproducing apparatus and image-reproducing method
An optical member 7 is bonded, at its rear side 7 b , to a holographic stereogram 6 . The front side 7 a of the optical member 7 consists of parallel triangular prisms. Illumination light ...
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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...
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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...
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