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7445873 |
Lithograph with beam guidance and method of producing digital holograms in a storage medium
Producing a digital hologram-in a storage medium includes: (i) focusing a write beam onto the storage medium; (ii) moving the write beam two-dimensionally relative to the storage medium; (iii)...
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7443553 |
Holographic sensors and their production
An array of discrete sensors disposed on a substrate, each sensor comprising a holographic support medium and a hologram disposed throughout the volume of the medium, whereby interaction with an...
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7417776 |
Hologram recording and reproduction method, hologram recording and reproduction apparatus, and hologram recording medium
A method and apparatus is disclosed which can reproduce multi-value data with high reproducibility from a hologram recording medium having data recorded in multi-values therein and can reduce the...
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7417634 |
Three dimensional display
The invention provides an improved means for displaying computer generated hologram (CGH). Images appearing in the image volume are realised as a set of planar facets that approximate to the shape...
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7413830 |
Lithograph with one-dimensional trigger mask and method of producing digital holograms in a storage medium
The present invention relates to a method of producing digital holograms in a storage medium, in which the technical problem of writing computer-generated holograms by means of optical lithography...
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7405851 |
Method for identifying articles
The invention relates to a method for identifying articles, wherein article identification data are made available and the article is provided with a hologram representing said data so that the...
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7384709 |
Lithograph with a trigger mask and method of producing digital holograms in a storage medium
A lithograph for producing digital holograms in a storage medium includes a light source for producing a write beam, the light source having drive means for the two-dimensional movement of the...
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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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7330657 |
Method to demultiplex wavelengths of light
An apparatus and method for demultiplexing multiple wavelengths of light. In one embodiment, an optical signal having a plurality of wavelengths is provided to an optical-to-electrical (OE) circuit...
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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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7315408 |
Video hologram and device for reconstructing video holograms for large objects
A video holographic display device operates so that the size of a reconstructed three dimensional scene is a function of the size of the hologram-bearing medium; the reconstructed three dimensional...
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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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7307767 |
Methods for calculating multilayer holograms, method for producing multilayer holograms and storage medium comprising a multilayer hologram
A method for the calculation and storage of a computer-generated multilayer hologram with more than or equal to 2 holograms includes the following steps. Field A O of a readout beam and field A R ...
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7301683 |
Hologram and holographic viewing device incorporating it
The invention relates to a hologram that enables two or more different images to be simultaneously reconstructed even in a state where the hologram is fixed in terms of relative position with...
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7298532 |
Single beam write and/or replay of spatial heterodyne holograms
A method of writing a spatially heterodyne hologram having spatially heterodyne fringes includes: passing a single write beam through a spatial light modulator that digitally modulates said single...
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7295200 |
Computer generated hologram display system
A method of displaying a computer generated hologram includes displaying the image as a set of facets that approximated to the true shape of the object to be displayed. Each of these facets is...
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7289253 |
System and methods for shearless hologram acquisition
Systems and methods for shearless digital hologram acquisition, including an apparatus incorporating an illumination source configured to produce a first beam of light, which is then split by a...
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RE39864 |
Controlled diffraction efficiency far field viewing devices
This invention pertains to the design of optimized far field viewing devices that simultaneously produce bright far field holographic light patterns and achieve good see-through performance to...
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7277209 |
Computer-assisted holographic method and device
The method consists of computing (E 1 -E 4 ) a set of two-dimensional images in a three-dimensional geometrical space representing a virtual object from respective different viewpoints. The virtual...
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7230746 |
3D display
A method of generating a Computer Generated Hologram (CGH) using the diffraction specific algorithm allows a curved wavefront to be produced from a single hogel, rather than the planar waves of the...
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7212323 |
Methods and apparatus for mass manufacturing two-dimensional binary information on transparent substrates using phase contrast modulated templates
Methods and apparatus for making, encoding, and encrypting binary patterns for storing recorded information. One of the methods includes the steps of providing an original image, fragmenting the...
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7190496 |
Enhanced environment visualization using holographic stereograms
Hologram production techniques can combine source data representing realistic information describing an environment with source data providing representational information describing a feature of...
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7165007 |
Method and apparatus for direct image pick-up of granular speck pattern generated by reflecting light of laser beam
A granular speck pattern is generated by a reflecting laser beam as an object to be measured is irradiated with a laser beam. This granular speck pattern is directly picked up as an image index by...
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7161721 |
Computer generated holograms
A method of generating a binary computer generated hologram for use in displaying a holographic image, the method comprising the steps of generating a complex modulation computer generated hologram...
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7145710 |
Optical processing
To operate an optical device comprising an SLM with a two-dimensional array of controllable phase-modulating elements groups of individual phase-modulating elements are delineated, and control data...
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7123392 |
Computer-generated hologram fabrication process, and hologram-recorded medium
The invention relates to a computer-generated hologram fabrication process that can reduce loads on computation of interference fringes for an original image including micro-characters. A visually...
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7088480 |
Distortion-tolerant 3-D object recognition by using single exposure on-axis digital holography
Disclosed herein is a method, system and computer readable medium for a distortion-tolerant 3-D object recognition that may include recording a single exposure digital hologram of a 3D object on a...
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7076100 |
Method and apprartus thereof for detecting a hidden image in a hologram
An apparatus for detecting a hidden image, which is formed in a first area of a hologram, is disclosed. The apparatus has a laser device for generating a laser beam and projecting the laser beam to...
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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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7054044 |
Computer-generated hologram and its fabrication process, reflector using a computer-generated hologram, and reflective liquid crystal display
The invention provides a computer-generated hologram which can be viewed in white at the desired viewing region and a reflective liquid crystal display using the same as a reflector. 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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7043073 |
Distortion correcting rendering techniques for autostereoscopic displays
Characterization of hologram elements (hogels) produced using specially designed test pattern images provides more accurate information that can be used to render images for use in hogel...
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7009741 |
Computation of computer generated holograms
A method of computing a computer generated hologram (CGH) for use in displaying a holographic image of a replay object. The method of generating a first computer generated hologram corresponding to...
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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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6927886 |
Reconfigurable image surface holograms
The invention provides systems and methods for generating and displaying computational holographic stereograms having a hologram surface and a spatially distinct image surface. A three-dimensional...
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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...
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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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6870649 |
Holographic viewing device, and computer-generated hologram for the same
The invention relates to a holographic viewing device that enables a bright reconstructed pattern to be viewed in place of light sources in a scene while a spot due to zero-order transmitted light...
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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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6778302 |
Holographic stereogram printing system, holographic stereogram printing method and holographing device
A holographic stereogram printing system to print holographic stereograms with good efficiency and no drop in the operating rate of the imaging system and holographic printer. An imaging system...
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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...
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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...
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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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6747769 |
Computer-generated hologram and its fabrication process, reflector using a computer-generated hologram, and reflective liquid crystal display
The invention provides a computer-generated hologram which can be viewed in white at the desired viewing region and a reflective liquid crystal display using the same as a reflector. The...
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6735001 |
Image display apparatus
An image display apparatus comprises a hologram screen 2 formed by bonding a hologram element 20 to light-transmissible films 21 and an illumination device 11 for irradiating image light ...
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6694882 |
Holographic stereogram printing apparatus and a method therefor
A holographic stereogram printing system capable of printing a holographic stereogram by selectively performing a desired image processing on a still picture image or a motion picture image...
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