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| Number | Title | Issue Date |
| 7633661 | Hologram recording apparatus and hologram recording method A hologram recording apparatus includes a light source for irradiating coherent light, light separator for separating the coherent light into light for reference beam and light for signal beam, optical path changer for changing an optical path of each light separate... | 12/15/2009 |
| 7416306 | Laser projector A reflection-type laser projector (100) projects modulated laser beams outputted from a laser projection unit (40), on a screen, wherein a reflector (112) as a constituent of the screen (110) has reflection characteristics of reflecting, ... | 08/26/2008 |
| 7364300 | Theta-parallax-only (TPO) displays A 3-D display may comprise a rotating optical diffuser for displaying 3-D parallax images in specific substantially unidirectional viewing zones as the rotating optical diffuser rotates; and a projector for projecting images through the rotating optical diffuser. | 04/29/2008 |
| 7317565 | Projection viewing system A projection viewing system of simplified construction and high illumination efficiency, which enables at least two images varying with viewing directions to be simultaneously displayed in a viewable fashion. The system includes at least two display devices 1... | 01/08/2008 |
| 7295356 | Method for improved holographic recording using beam apodization An apodization system for achieving a substantially uniform intensity profile of a modulated reference beam on a holographic recording medium. The substantially uniform intensity profile serves to improve the quality of any and all recorded holograms. In high-densit... | 11/13/2007 |
| 7262893 | Data read/write device for holographic WORM and method thereof A data writing and reading device is capable of writing and reading data with respect to a holographic storage medium. The data writing and reading device includes a light source which emits a laser beam, a focusing lens unit having a multi-focal lens which splits t... | 08/28/2007 |
| 7218597 | Holographic recording method In the disclosed holographic recording method, when multiplex recording of data of a plurality of pages is performed, exposure time of a hologram of a final page to be recorded is fixed irrespective of a degree of multiplicity while an exposure time of each page is ... | 05/15/2007 |
| 7187481 | System and method for providing gain and thresholding to a holographic data parallel recording and replication system incorporating independent angular address assignment System and method for providing gain and thresholding to a holographic data parallel recording and replication system incorporating independent angular address assignment. A plurality of information bearing light beams in an information bearing light beam arm of a d... | 03/06/2007 |
| 7099058 | Hologram preparing method In the method for producing holograms, a plurality of images displayed on a spatial optical modulating element 6 is used as the object light. Through a lens array 7 composed of a plurality of lenses disposed corresponding to each of the images, which a... | 08/29/2006 |
| 7099057 | In-line holographic mask for micromachining A method of fabricating a holographic mask includes the steps of providing an illumination source and a non-opaque object mask. The source is for generating a coherent illumination beam directed along an axis. The object mask is capable of transmitting a portion of ... | 08/29/2006 |
| 7088488 | Spatial light modulator device with diffusive element The invention is directed to a spatial light modulator device that can improve holographic data recording systems, and various methods and systems incorporating the device. The spatial light modulator device includes a diffusive element to diffuse or scatter a data ... | 08/08/2006 |
| 7085028 | Hologram recording apparatus, hologram recording method, and hologram recording medium A hologram recording apparatus, a hologram recording method and a hologram recording medium reduce noise components generated by a phase modulation type spatial light modulator, thus permitting improved integrity of data to be achieved. A light beam whose diffractio... | 08/01/2006 |
| 7061609 | Measuring wavelength change An optical wavelength analyser including: an entrance slit (4) for receiving a light beam (3) including signals with various wavelengths and passing the beam at least partly; a diffractor (6, 7, 9) for receiving the passed beam and diffracting t... | 06/13/2006 |
| 7029128 | Table type display device A table type display device, in which a high resolution display with an unremarkable connection is realized at the time of large screen display by using a screen with a composition having few bending is described. In a table type display device comprising plural M o... | 04/18/2006 |
| 7006004 | Light-source lamp unit, light-source device and projection-type display apparatus A projector includes a first lens plate having a plurality of lenses, a second lens plate having a plurality of lenses, a light valve that modulates an output light beam from the second lens plate, and a light source apparatus. The light-source apparatus has a light... | 02/28/2006 |
| 7006215 | Shaped illumination geometry and intensity using a diffractive optical element A method and apparatus to illuminate a target. The apparatus can comprise a first lens configured to receive light from the light source, a diffractive optical element configured to receive the light from the first lens and to regulate the light into regulated light... | 02/28/2006 |
| 6999071 | Method and apparatus for displaying 3d images The invention relates to a method for displaying three-dimensional images. In the method light beams (Le) are associated to several different screen points (P) of a screen (20). The light beams (Le) produce different views associated to ... | 02/14/2006 |
| 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 recordings is carried out, each covering only a partial area of the real v... | 01/03/2006 |
| 6980337 | Apparatus and method for recording digital data on a holographic storage system A holographic apparatus includes a mask for modulating a signal beam to generate a modulated signal beam; a conical prism, which has a cone portion and a base portion, for refracting a reference beam to generate a refracted reference beam, wherein the refracted refe... | 12/27/2005 |
| 6975443 | Multi-beam pattern generator A scanning pattern generator and a method for microlithographic multi-beam writing of high precision patterns on a photosensitive substrate (11), the system comprising a light source (1), preferably a laser, for generating at least two light beams, a c... | 12/13/2005 |
| 6914918 | Optical device, laser beam source, laser apparatus and method of producing optical device After forming domain inverted layers 3 in an LiTaO3 substrate 1, an optical waveguide is formed. By performing low-temperature annealing for the optical wavelength conversion element thus formed, a stable proton exchange layer 8 is fo... | 07/05/2005 |
| 6912074 | Method of producing a big size holographic projection screen for displaying a three-dimensional color images without color deterioration A method of producing a big size holographic screen for projection of the stereoscopic or multiview 3-dimensional color images is proposed, where a narrow and elongate slit-shaped diffuser is recorded on the hologram as an object to ensure the well defined viewing z... | 06/28/2005 |
| 6903851 | Method for producing light scattering elements The present invention relates to a method for producing light-scattering elements by holographic illumination of a layer (10) of a photo-sensitive material on a support plate (1) and subsequent development of the layer (10) in order to generatin... | 06/07/2005 |
| 6894815 | Reference beam absorbers-blockers In accordance with teachings of the present invention, a device accomplishes the task of reducing or preventing reflections of the reference beam off a diffuser from striking the holographic recording material. First, the device absorbs a large percentage of the ref... | 05/17/2005 |
| 6870651 | Apparatus and method for generating a dynamic image Apparatus for generating a dynamic image includes a laser light source for generating a coherent beam of light; optics for separating the light beam into a reference beam and an object beam; a lenslet light modulator, including an array of lenslets and a pixilated l... | 03/22/2005 |
| 6852452 | Method of fabricating hologram screen and hologram imaging apparatus A method of fabricating a hologram screen having a large visual range and a hologram imaging apparatus used for the particular method of fabricating the hologram screen are disclosed. A plurality of mirrors (3) extended toward a plurality of photosensitive me... | 02/08/2005 |
| 6836348 | Image display device and holographic screen An image display device comprising a holographic screen and an image projection device for projecting an image beam onto the holographic screen at an upward or downward angle is provided, wherein a forward view color difference Δu′v′ between a chromaticity valu... | 12/28/2004 |
| 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 operably connected to the projector. A computer is operably connected t... | 05/04/2004 |
| 6721075 | Holographic optical element A holographic optical element comprising at least two sets of regions, the regions of each set being different from the regions of the other set(s) and being interleaved or overlapping with the regions of the other set(s) and being constructed such that light incide... | 04/13/2004 |
| 6692129 | Display apparatus including RGB color combiner and 1D light valve relay including schlieren filter The optical system includes a plurality of light modulators, one or more combining filters, and an optical relay system including a filter. Each light modulator modulates a corresponding incident light beam. The one or more combining filters superimpose t... | 02/17/2004 |
| 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 balance in a color hologram surface, for instance, can be well ... | 10/28/2003 |
| 6602596 | Light diffusion sheet There is provided a light diffusion sheet comprising a light diffusion layer formed on a transparent substrate and containing a binder resin and resin particles that impart an uneven surface, wherein the uneven surface of the light diffusion layer exhibit... | 08/05/2003 |
| 6590680 | Holographic optical element A holographic optical element comprising at least two sets of regions, the regions of each set being different from the regions of the other set(s) and being interleaved or overlapping with the regions of the other set(s) and being constructed such that l... | 07/08/2003 |
| 6516008 | Laser pulse slicer and dual wavelength converter for chemical sensing A wavelength conversion system and method. The inventive system is adapted to receive a beam of input energy having a first spiked portion with a first wavelength and a first spatial and/or temporal intensity profile and a second tail portion with the fir... | 02/04/2003 |
| 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 the image data to control portions of a laser beam split int... | 11/26/2002 |
| 6462869 | Projection screen and system for large-surface images A projection screen (30) for representation of images by back-projection comprises a plurality of holographic-optical elements (10) arranged in one plane. The holographic-optical elements are illuminated by a projector (14) comprising three projection dev... | 10/08/2002 |
| 6431731 | Laser device and method for producing diffuse illumination A laser device which directs one or more wavelengths of pulsed diffuse laser light at a target to produce a diffuse laser illumination, and a method of illuminating and viewing a target with the reflection from one or more wavelengths of diffuse laser lig... | 08/13/2002 |
| 6330086 | Digital holography device A digital holography device, applicable for example to the 3D mapping of objects, is used to determine the complex amplitude of a signal wave coming from an object illuminated by a known illumination wave. For this purpose, the device includes a source fo... | 12/11/2001 |
| 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 of high density and high selectivity is achievable by emp... | 11/27/2001 |
| 6288805 | Holographic projection screen and method of production A holographic projection screen for large screen projection and back projection with a liquid crystal projector. The screen includes at least one layer made of a photosensitive material in which at least one index grating may be recorded by an interferenc... | 09/11/2001 |
