Holographic Process, Composition, Or Product Patents (Class 430/1)
  • Patent number: 6950173
    Abstract: Described herein are the materials, mechanisms and procedures for optimizing various performance parameters of HPDLC optical devices in order to meet differing performance requirements. These optimization tailoring techniques include control and independent optimization of switchable HPDLC optical devices to meet the demanding requirements of anticipated applications for, inter alia, the telecommunications and display industries. These techniques include optimization of diffraction efficiency, i.e., index modulation, polarization dependence control, haze, cosmetic quality, control of response and relaxation time, voltage driving for on and off switching, and material uniformity. This control and independent optimization tailors properties of switchable HPDLC optical devices according to the specific requirements of the application of the switchable HPDLC optical device.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: September 27, 2005
    Assignee: Science Applications International Corporation
    Inventors: Richard L. Sutherland, Stephen A. Siwecki, Vince P. Tondiglia
  • Patent number: 6940801
    Abstract: An optical recording medium, an optical recording and reproducing method, and an apparatus that can record and reproduce multilevel information at a high density and with a high S/N ratio. Recording light emitted from a light source is collimated by a collimation lens and introduced into a polarization rotary device. Recording light transmitted by the polarization rotary device is focused by an objective lens onto an optical recording medium. In response, a photo-induced birefringence is recorded on the optical recording medium. Multilevel recording is performed by controlling a voltage applied to the polarization rotary device to change a polarization angle ? of recording light. Reproduction is performed by detecting light reflected from the optical recording medium with an analyzer and a detector.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: September 6, 2005
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tsutomu Ishii, Katsunori Kawano, Kazuo Baba, Kiichi Ueyanagi
  • Patent number: 6939648
    Abstract: The optical article of the invention, e.g., holographic recording medium or polymeric waveguide, is formed by mixing a matrix precursor and a photoactive monomer, and curing the mixture to form the matrix in situ. The reaction by which the matrix precursor is polymerized during the cure is independent from the reaction by which the photoactive monomer is polymerized during writing of data. In addition, the matrix polymer and the polymer resulting from polymerization of the photoactive monomer are compatible with each other. Use of a matrix precursor and photoactive monomer that polymerize by independent reactions substantially prevents cross-reaction between the photoactive monomer and the matrix precursor during the cure and inhibition of subsequent monomer polymerization. Use of a matrix precursor and photoactive monomer that result in compatible polymers substantially avoids phase separation. And in situ formation allows fabrication of articles with desirable thicknesses.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: September 6, 2005
    Assignee: InPhase Technologies
    Inventors: Lisa Dhar, Arturo Hale, Howard Edan Katz, Marcia Lea Schilling, Melinda Lamont Schnoes
  • Patent number: 6924082
    Abstract: The present application describes a method for information storage and data processing comprising the steps of thermo inducing or photo inducing double-bond shifts (DBS) in substituted (4n)-annulenes thus generating transitions between two different conjugation states with at least one substituent. The two different conjugation states are the conjugation on-state and conjugation off-state of the annulene core ?-electrons with the substituent ?-electrons. The present invention is furthermore related to novel substituted (4n)-heptalenes being optically and/or thermally switchable, based on thermal or photochemical double-bond shifts (DBS) as well as methods for their preparation. The (4n)-heptalenes can be used for information storage and data processing devices.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: August 2, 2005
    Assignee: Ciba Specialty Chemicals Corporation
    Inventor: Hans-Jürgen Hansen
  • Patent number: 6914703
    Abstract: A holographic recording material composition used for storing optical information as a spatial variation of refractive index, having: (a) a compound having at least one polymerizable functional group; (b) a photopolymerization initiator; and (c) colloidal silica particles having an average particle diameter of from 4 to 30 nm.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: July 5, 2005
    Assignees: Nissan Chemical Industries, Ltd.
    Inventors: Yasuo Tomita, Naoaki Suzuki
  • Patent number: 6909528
    Abstract: A phase volume hologram and a method for producing the phase volume hologram are described herein. The phase volume hologram is made by filling the microcavities of a porous transparent siliceous body with a polymerisable composition (e.g., liquid monomer or monomer/oligomer mixture). The filled siliceous body then has a hologram interference pattern recorded therein using a laser light that in conformity with the hologram interference pattern converts the polymerisable composition into a polymerized material (solid-phase polymer) and a non-polymerized material. In particular, the polymerized material has a volume fraction in the microcavities that is close to 1 in the vicinity of a maxima of the recorded interference pattern and close to 0 in the vicinity of a minima of the recorded interference pattern. Thereafter, the non-polymerized material is removed from the siliceous body which now resembles the phase volume hologram.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: June 21, 2005
    Assignee: Corning Incorporated
    Inventors: Yuri L Korzinin, Alia M Kursakova, Nikita S Shelekhov, Vitaly I Sukhanov
  • Patent number: 6906835
    Abstract: The present invention discloses a recording medium comprising an improved doped Stoichiometric Lithium Niobate (SLN) crystal for high-speed holographic data storage. The improved doped SLN has an extremely high optical damage resistance of more than 145 kW/cm2 for power density of an incident laser beam along the c axis. The Recording time using the present improved doped SLN is advantageously very short and is about 1 second for a single hologram with a saturated diffraction efficiency of 28.7% at a recording laser beam density of 70 W/cm2. Reliable retrieval of a signal-image written at as low as 1 milliseconds has been performed in the Z-cut doped SLN. The present recording medium is an improved doped SLN of a Z-cut SLN crystal doped with Iron (Fe) and Terbium (Tb). The Terbium (Tb) content within the fluxed melts for growing the improved doped SLN ranges from 10 ppm to 140 ppm.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: June 14, 2005
    Assignee: Agency for Science, Technology and Research
    Inventors: Xuewu Xu, Sanjeev Solanki, Tow Chong Chong
  • Patent number: 6904201
    Abstract: A fiber Bragg grating may be written at an arbitrary wavelength without extensive recalibration or reconfiguration of the writing equipment in some embodiments. A pair of writing beams may be used to expose the fiber. The crossing angles of the writing beams may be adjusted.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: June 7, 2005
    Assignee: Intel Corporation
    Inventors: Pierre St. Hilaire, Anders Grunnet-Jepsen
  • Patent number: 6890628
    Abstract: A self-adhering image made by the steps comprising: forming an imaged receiver sheet (140) having an image (230), a first thermoplastic layer (304), and a first support layer (150); laminating an imageless receiver sheet (160) with a second thermoplastic layer (308) and a second support layer (170) with the imaged receiver sheet (140) thereby encapsulating the image (230) between the first thermoplastic layer (304) and the second thermoplastic layer (308); removing the first support layer (150); removing the second support layer (170); and forming an encapsulated image capable of self-adhering to a surface.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: May 10, 2005
    Assignee: Eastman Kodak Company
    Inventor: Roger S. Kerr
  • Patent number: 6878493
    Abstract: The invention relates to a hologram-recording dry plate fabrication process and system that can be used to fabricate a transmission or reflection hologram-recording dry plate particularly best suited for applications where high precision and high cleanliness are required. The hologram-recording dry plate comprises a substrate feeding means for feeding a substrate, a film feeding means for feeding a sheet-cut form of film having a separator, a separator releasing means for releasing the separator from the thus fed film, and a lamination means for laminating the film from which the separator is released on one surface of the thus fed substrate from the side of the film from which the separator is released.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: April 12, 2005
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kenji Ueda, Yasuyuki Ohyagi
  • Patent number: 6878494
    Abstract: A new photopolymerizable material allows single-step, fast recording of volume holograms with properties that can be electrically controlled. Polymer-dispersed liquid crystals (PDLCs) in accordance with the invention preferably comprise a homogeneous mixture of a nematic liquid crystal and a multifunctional pentaacrylate monomer, in combination with photoinitiator, coinitiator and cross-linking agent. Optionally, a surfactant such as octanoic acid may also be added. The PDLC material is exposed to coherent light to produce an interference pattern inside the material. Photopolymerization of the new PDLC material produces a hologram of clearly separated liquid crystal domains and cured polymer domains. Volume transmission gratings made with the new PDLC material can be electrically switched between nearly 100% diffraction efficiency and nearly 0% diffraction efficiency. By increasing the frequency of the switching voltage, switching voltages in the range of 50 Vrms can be achieved.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: April 12, 2005
    Assignee: Science Applications International Corporation
    Inventors: Richard L. Sutehrland, Lalquidi V. Natarajan, Vince P. Tondiglia, Timothy J. Bunning
  • Patent number: 6867888
    Abstract: Transmission and reflection type holograms may be formed utilizing a novel polymer-dispersed liquid crystal (PDLC) material and its unique switching characteristics to form optical elements. Applications for these switchable holograms include communications switches and switchable transmission, and reflection red, green, and blue lenses. The PDLC material of the present invention offers all of the features of holographic photopolymers with the added advantage that the hologram can be switched on and off with the application of an electric field. The material is a mixture of a polymerizable monomer and liquid crystal, along with other ingredients, including a photoinitiator dye. Upon irradiation, the liquid crystal separates as a distinct phase of nanometer-size droplets aligned in periodic channels forming the hologram. The material is called a holographic polymer-dispersed liquid crystal (H-PDLC).
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: March 15, 2005
    Assignee: Science Applications International Corporation
    Inventors: Richard L. Sutherland, Bill Hagan, William Kelly, Bob Epling
  • Patent number: 6864019
    Abstract: Holographic data storage media having a sandwiched construction are described in which a holographic recording material is sandwiched between two substrates. A variety of different formulations of the holographic recording material are also described. By improving the formulation of the photosensitive material, holographic media can be improved.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: March 8, 2005
    Assignee: Imation Corp.
    Inventors: Ramon F. Hegel, Stanley C. Busman
  • Patent number: 6858669
    Abstract: Plastic article having at least one side provided with a coating for increasing the melting point of the article and for increasing temperature induced plastic flow characteristic of the article. Process of and apparatus for manufacturing such article.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: February 22, 2005
    Assignee: Creative Film, Corp
    Inventors: Joseph W. Coburn, Jr., Robert C. Weiss
  • Patent number: 6856433
    Abstract: A holographic recording medium exhibiting a high recording sensitivity without execution of reduction treatment. A system records information on the holographic recording medium by using a gating light within a wavelength band causing less optical damage to the holographic recording medium. The holographic recording medium includes a single crystal of lithium niobate (LiNbO3) or lithium tantalate (LiTaO3) containing Mn as a dopant.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: February 15, 2005
    Assignees: Pioneer Corporation, National Institute for Material Science
    Inventors: Hideki Hatano, Takashi Yamaji, Kenji Kitamura, Shunji Takekawa, Masaru Nakamura
  • Patent number: 6852452
    Abstract: 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 members (5) are arranged at a plurality of end portions (21), respectively, of a light diffuser (2). At least a reference beam (41) and object beams (42) passed through the light diffuser (2) are radiated on a plurality of the photosensitive members (5) individually thereby to form a plurality of holograms. These holograms are integrated with each other by being arranged two-dimensionally thereby to fabricate a hologram screen. Among the mirrors (3), a reference beam-side mirror (31) arranged nearer to the light source of the reference beams (41) is extended from the light diffuser (2) by a length varied with the position of the photosensitive member (5) to be exposed.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: February 8, 2005
    Assignee: Denso Corporation
    Inventor: Kenichiro Takada
  • Patent number: 6850345
    Abstract: 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 portion having a thickness less than approximately 2 millimeters. A holographic recording material may be sandwiched between the first and second thermoplastic substrate portions. By making thermoplastic substrate portions sufficiently thin, edge wedge problems can be avoided.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: February 1, 2005
    Assignee: Imation Corp.
    Inventors: Jathan D. Edwards, Frank E. Aspen, Ramon F. Hegel, Chad R. Sandstrom
  • Publication number: 20040259030
    Abstract: A resonant enhanced photosensitive material includes a trap center that is adapted to interact with light and enhances the photosensitivity of the material based on a resonant interaction process with photons.
    Type: Application
    Filed: June 23, 2003
    Publication date: December 23, 2004
    Inventors: Joseph S. Hayden, Bianca Schreder, Jose Zimmer
  • Publication number: 20040257629
    Abstract: The invention relates a lithograph for producing computer-generated holograms in a storage medium (13), provided with a source for generating a write beam (2), a moving lens (4) for focussing the write beam (2), means for displacing the moving lens (4) along a direction of movement (6), and with a means for displacing the write beam (2) in relation to the storage medium (13) in a manner that is perpendicular to the direction of movement (6). The aim of the invention is to provide a lithograph in which disruptions in the movement of a lens perpendicular to the direction of movement thereof do not effect this end, the moving lens (4) has refractive power only essentially in a first direction that is parallel to the direction of movement (6). In addition, a stationary lens (9) is provided, and this stationary lens (9) has refractive power only essentially in a second direction (5), whereby the second direction (5) is perpendicular to the first direction and to the write beam (2).
    Type: Application
    Filed: August 13, 2004
    Publication date: December 23, 2004
    Inventors: Steffen Noehte, Christoph Dietrich, Robert Thomann, Stefan Stadler, Joern Leiber
  • Publication number: 20040253521
    Abstract: It is a main object of the present invention to provide a volume hologram layer with good foil cutting property which is used for a volume hologram transfer foil and the like. The present invention provides a volume hologram layer wherein when the layer thickness thereof is 20 &mgr;m, breaking strength is in a range from 10 MPa to 30 MPa and breaking strain is in a range from 0.1% to 3% at 25° C., and breaking strength is in a range from 0.1 MPa to 1 MPa and breaking strain is in a range from 0.1% to 5% at 130° C., to thereby solve the above problem.
    Type: Application
    Filed: June 10, 2003
    Publication date: December 16, 2004
    Inventors: Hiroyuki Otaki, Toshio Yoshihara, Tetsuya Toshine
  • Patent number: 6830850
    Abstract: An interferometric lithography method includes providing a first layer of material over a substrate and providing a second layer of material over the first layer of material. The method further includes providing a layer of photoresist over the first and second layers of material and providing coherent light to the first and second layers. The coherent light has an intensity insufficient to chemically transform the photoresist. The coherent light reflects off the first and layers to interfere with an intensity sufficient to chemically transform the photoresist.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: December 14, 2004
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Zoran Krivokapic, Bhanwar Singh
  • Patent number: 6828078
    Abstract: A radiation sensitive refractive index changing composition comprising (A) a decomposable compound, (B) a non-decomposable compound having a lower refractive index than the decomposable compound (A), (C) a radiation sensitive decomposer and (D) a stabilizer. By exposing the composition to radiation through a pattern mask, the above components (C) and (A) of an exposed portion are decomposed and a refractive index difference is made between the exposed portion and unexposed portion, thereby forming a pattern having different refractive indices.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: December 7, 2004
    Assignee: JSR Corporation
    Inventors: Isao Nishimura, Nobuo Bessho, Atsushi Kumano, Tsutomu Shimokawa, Kenji Yamada
  • Publication number: 20040240012
    Abstract: Quality of a reproduced light beam is improved, and rewriting and recording are performed at high speed without erasing data. Each page of a hologram is newly recorded so that the maximum point of diffraction light beam intensity in reproducing the newly recorded hologram is located at a position where diffraction light beam intensity from a data page of a hologram which has been previously recorded in a hologram recording medium is minimized at the time of reproducing the data.
    Type: Application
    Filed: March 25, 2004
    Publication date: December 2, 2004
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shin Yasuda, Jiro Minabe, Katsunori Kawano, Tatsuya Maruyama, Norie Matsui
  • Patent number: 6824929
    Abstract: A method is disclosed for replicating (copying) a master hologram into a photosensitive layer to produce a copy of the hologram in a manner such that the copy of the hologram is an accurate and true replication of the master hologram with minimum interface-related defects. A holographic element containing a master hologram for use in contact copying is also disclosed.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: November 30, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Arthur John Taggi, Mark Leaman Armstrong
  • Publication number: 20040234867
    Abstract: A ferroelectric material in which the refractive index change can be induced by irradiation with light at two different wavelengths without performing a reduction treatment or doping impurities. The ferroelectric material of the invention in which the refractive index change is induced by irradiation with light at two different wavelengths is a lithium tantalate single crystal with the composition of Li2O/(Li2O+Ta2O5)=0.4966 to 0.4995. Preferably, the ferroelectric material is a lithium tantalate single crystal with the composition of Li2O/(Li2O+Ta2O5)=0.4974 to 0.4989. Preferably, the infrared absorption coefficient in the [OH] stretching mode falls within a range of 0 cm−1 to 0.15 cm−1 (0 cm−1 and 0.15 cm−1 are included in the range).
    Type: Application
    Filed: March 12, 2004
    Publication date: November 25, 2004
    Applicants: Pioneer Corporation, National Institute for Materials Science, OXIDE Corporation
    Inventors: Hideki Hatano, Youwen Liu, Kenji Kitamura, Shunji Takekawa, Masaru Nakamura, Yasunori Furukawa
  • Publication number: 20040233490
    Abstract: 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 as quickly as possible and with little effort with simultaneous accurate control of the timed triggering and the positioning of the write beam is achieved in that a write beam is focused onto the storage medium and moved one-dimensionally relative to the storage medium, in that a scanning beam is focused onto a trigger mask having a plurality of trigger lines and moved one-dimensionally transversely relative to the trigger lines, the movement of the scanning beam being coupled with the movement of the write beam, in that, during the scanning of the trigger lines, a timed trigger signal is generated as a function of the arrangement of the trigger lines, in that, with the aid of the timed trigger signal, the intensity of the write beam on the storage medium is controlled, and in that the hologram is written line by li
    Type: Application
    Filed: June 30, 2004
    Publication date: November 25, 2004
    Inventors: Steffen Noehte, Christoph Dietrich, Robert Thomann, Matthias Gerspach, Jorn Leiber, Stefan Stadler
  • Patent number: 6811930
    Abstract: A post-exposure treatment method of a silver halide emulsion layer in the manufacture of a hologram, a hologram manufacturing using the post-exposure treatment method, and a holographic optical element including the hologram are provided. The post-exposure treatment method of a silver halide emulsion layer involves: pre-hardening the silver halide emulsion layer after exposure; developing the pre-hardened silver halide emulsion layer using a developer solution; bleaching the developed silver halide emulsion layer; hardening the bleached silver halide emulsion layer; drying the hardened silver halide emulsion layer; surface-hardening the dried silver halide emulsion layer; fixing the hardened silver halide emulsion layer; treating the fixed silver halide emulsion layer using warm water; and drying the silver halide emulsion layer which has been treated using warm water.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: November 2, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jong-man Kim
  • Publication number: 20040214093
    Abstract: A thermal transfer material includes a support. A release layer is overlaid on the support. A coloring transfer layer is overlaid on the release layer, has thermoplasticity, and is colorable by being exposed and then pressurized. In a printer for use with the thermal transfer material, an image is formed by exposing the coloring transfer layer. The coloring transfer layer is placed on image receiving material after the image is formed. The thermal transfer material is heated and pressurized while the coloring transfer layer is placed on, so as to color the image and transfer the coloring transfer layer to the image receiving material.
    Type: Application
    Filed: June 1, 2001
    Publication date: October 28, 2004
    Inventor: Takao Miyazaki
  • Patent number: 6806982
    Abstract: Pre-sensitization techniques can be used in conjunction with holographic recording materials to allow high quality holographic stereograms to be recorded in those holographic recording materials using pulsed lasers. Additional hologram production system hardware and software designs for use with pulsed lasers are disclosed.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: October 19, 2004
    Assignee: Zebra Imaging, Inc.
    Inventors: Craig Newswanger, Pankaj Lad, Robert L. Sitton, Qiang Huang, Michael A. Klug, Mark E. Holzbach
  • Patent number: 6805934
    Abstract: The present invention relates to a volume hologram laminate with low generation of spotty hologram flaws in the volume hologram layer even when kept under pressurized conditions during storage, and to a volume hologram laminate-fabricating label. The volume hologram laminate 1 of the invention has a first adhesive layer 3, a volume hologram layer 5, a second adhesive layer 4 and a surface protective film 6 formed in that order on a substrate 1, wherein the volume hologram layer is a hologram recording in a recording material comprising a matrix polymer and a photopolymerizable compound, having a glass transition point of 30° C.-70° C. and a dynamic storage elastic modulus of 5×105 Pa-5×107 Pa at 50° C. when measured at 6.28 rad/s, and the second adhesive layer has a dynamic storage elastic modulus of no greater than 5×104 Pa or at least 2.5×105 Pa at 50° C. when measured at 6.28 rad/s.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: October 19, 2004
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hiroyuki Ohtaki, Kenji Ueda
  • Publication number: 20040202942
    Abstract: A holographic recording medium containing a first substrate and a second substrate having a holographic recording layer between the first substrate and the second substrate, the holographic recording layer containing:
    Type: Application
    Filed: March 31, 2004
    Publication date: October 14, 2004
    Inventor: Toshihisa Takeyama
  • Patent number: 6803153
    Abstract: An optical storage medium of the present invention enables storage of data with high precision at high speed, and rewriting of data at high speed without an erasing process. Optical storage, reading and retrieving methods and optical storage, reading, and retrieving apparatuses using the medium are also provided. The optical storage medium has at least a polarization-sensitive member having the photo-induced birefringence property, such as a member made of polyester polymer having cyanoazobenzene as a side chain. The above apparatuses have spatial light modulator capable of modulating polarization. The modulator provides information of bit of two-dimensional data to each corresponding pixel by application or non-application of a voltage, and modulates the polarization of the beam incident on each pixel. Thereby, a signal beam transmitted through the spatial light modulator having a spatial polarization modulation corresponding to the two-dimensional data is obtained.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: October 12, 2004
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsunori Kawano, Yasunari Nishikata, Tsutomu Ishii
  • Publication number: 20040197670
    Abstract: A holographic recording medium comprising a first substrate and a second substrate having a holographic recording layer between the first substrate and the second substrate, the holographic recording layer containing:
    Type: Application
    Filed: March 16, 2004
    Publication date: October 7, 2004
    Applicant: Konica Minolta Holdings, Inc.
    Inventor: Toshihisa Takeyama
  • Publication number: 20040190093
    Abstract: The present invention relates to a method for producing an optical recording medium. In the method, on the surface of a recording layer formed by spin-coating a first coating solution containing a photo-isomerizable component, a second coating solution that contains a photo-isomerizable component that can be isomerized by radiation having the same wavelength as radiation used for isomerizing the photo-isomerizable component contained in the recording layer and incapable of dissolving the recording layer is spin-coated to form an intermediate layer. Since the intermediate layer thus formed cannot be dissolved by the first coating solution, a recording layer is further laminated on this layer. Thus, it becomes possible to make the recording layer thicker and also to provide a high-density recording characteristic.
    Type: Application
    Filed: September 9, 2003
    Publication date: September 30, 2004
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Norie Matsui, Katsunori Kawano, Jiro Minabe, Tatsuya Maruyama, Shin Yasuda, Kazuhiro Hama, Tsutomu Ishii
  • Publication number: 20040188871
    Abstract: A holographic image shrinkable film and the manufacture thereof is to spread a UV resin film on a shrinkable film; stick the UV resin film tightly against a metal wheel engraved with a holographic pattern, holographic film or separating type hot stamping film; illuminate the UV resin film with an UV lamp so as to harden the UV resin film instantly; and remove the harden UV resin film from the metal wheel, the holographic film, or separating type hot stamping film; the holographic pattern on the metal wheel or the holographic film is copied onto the UV resin film, or a separating type hot stamping film substrate is combined on the UV resin film. The manufacturing method according to the present invention is rather not dangerous, and a specialist is not need. Therefore, a mass production can be practiced to save production cost can be saved.
    Type: Application
    Filed: March 27, 2003
    Publication date: September 30, 2004
    Applicant: Klaser Technology Inc.
    Inventors: Tsung-Ming Shiao, Cheng-Hsiu Chen
  • Publication number: 20040191637
    Abstract: The invention is a method of packaging volume holographic filters to modify the temperature sensitivity using fixed volume holographic grating filters (VHG). These filters are recorded using either a phase mask or a two-beam method. A mechanical constraint is provided to the filter by way of a stress. This stress can be applied equally to both simple reflection grating as well as slanted reflection grating. One way is to use a filter-anisotropic tube arrangement where the tube is made by either stacking washers of precise inner diameter or by wrapping a wire around a central filter core. To modify the thermal wavelength coefficient of the filter, clamps comprising plates and screws are used, the filter is inserted into a substrate, or the filter is sandwiched between substrates.
    Type: Application
    Filed: March 25, 2004
    Publication date: September 30, 2004
    Inventors: Gregory Steckman, Charles Williams, Christophe Moser
  • Publication number: 20040180266
    Abstract: A holographic optical recording medium includes a plastic substrate, a first inorganic intermediate layer formed on the plastic substrate, and an organic recording layer on which information is recorded by using holography. The organic recording layer is formed on the first inorganic intermediate layer.
    Type: Application
    Filed: February 11, 2004
    Publication date: September 16, 2004
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiko Hirao, Kazuki Matsumoto, Katsutaro Ichihara
  • Patent number: 6790593
    Abstract: There was found a metallocenyl-phthalocyanine or its metal complex of a divalent metal, oxometal, halogenometal or hydroxymetal, in which at least one of the four phenyl rings of the phthalocyanine contains, bound via a bridge unit E, at least one metallocene radical as substituent, E being composed of a chain of at least two atoms or atom groups selected from the group consisting of —CH2—, —C(═O)—, —CH(C1-C4alkyl)—, —C(C1-C4alkyl)2—, —NH—, —S—, —O— and —CH═CH—, as well as mixtures of the novel compounds which comprise, inter alia, isomers, a process for the production, the use and recording media comprising the novel compounds.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: September 14, 2004
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Heinz Wolleb, Annemarie Wolleb, Beat Schmidhalter, Jean-Luc Budry
  • Publication number: 20040175628
    Abstract: Copolymer structures are formed by exposing a substrate with an imaging layer thereon to two or more beams of selected wavelengths to form interference patterns at the imaging layer to change the wettability of the imaging layer in accordance with the interference patterns. A layer of a selected block copolymer is deposited onto the exposed imaging layer and annealed to separate the components of the copolymer in accordance with the pattern of wettability and to replicate the pattern of the imaging layer in the copolymer layer. Stripes or isolated regions of the separated components may be formed with periodic dimensions in the range of 100 nm or less.
    Type: Application
    Filed: March 15, 2004
    Publication date: September 9, 2004
    Applicant: Wisconsin Alumni Research Foundation
    Inventors: Paul F. Nealey, Juan J. DePablo, Francesco Cerrina, Harun H. Solak, XiaoMin Yang, Richard D. Peters, Qiang Wang
  • Publication number: 20040175627
    Abstract: The present invention offers increased efficiency and quality in the duplication of a master hologram utilizing an improved method of contact printing. This improved method of contact printing employs a polymer-dispersed liquid crystal (PDLC) recording medium as the duplication blank and/or the master hologram material. The optical qualities of the PDLC material described herein provide an improved method of duplication using single beam contact printing regardless of the material comprising the master hologram. Thus, master holograms originally recorded using highly complex optical geometries (e.g., computer generated holograms) are capable of duplication without the need for multiple beam power/intensity balancing and long recording times. The improved hologram contact printing method described herein works with virtually any type of master hologram, including both reflection and transmission holograms.
    Type: Application
    Filed: March 10, 2004
    Publication date: September 9, 2004
    Inventors: Richard L. Sutherland, John Sappington, Donna M. Brandelik, Stephen A. Siwecki, Christina K. Shepherd (nee Wendel), Robert T. Pogue
  • Patent number: 6787117
    Abstract: There are provided a porous hollow fiber membrane capable of economically and efficiently recovering germanium which has heretofore been entirely disposed as a waste, and a method for recovery of germanium oxide using such a porous hollow fiber membrane.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: September 7, 2004
    Assignee: Asai Germanium Research Institute Co., Ltd.
    Inventors: Kyoichi Saito, Katuyuki Sato, Mitsuo Akiba
  • Publication number: 20040170928
    Abstract: A method for patterning a layer on a substrate can include projecting coherent radiation toward a reflector surface so that the coherent radiation is reflected off the reflector surface to provide a holographic projection of a desired image wherein the reflector surface includes information that corresponds to an inverse of the holographic projection of the desired image. The substrate including the layer can be maintained in the path of the reflected radiation so that the holographic projection is projected onto the layer. Related systems are also discussed.
    Type: Application
    Filed: March 9, 2004
    Publication date: September 2, 2004
    Inventors: Daniel J. C. Herr, David Charles Joy
  • Patent number: 6784300
    Abstract: Disclosed is a holographic recording medium. The novel holographic recording mediums disclosed herein comprises: a) at least one polyfunctional epoxide monomer or oligomer which undergoes acid initiated cationic polymerization. Each epoxide in the monomer or oligomer is linked by group comprising a siloxane to a silicon atom and each monomer or oligomer has an epoxy equivalent weight of greater than about 300 grams/mole epoxide; b) a binder which is capable of supporting cationic polymerization; c) an acid generator capable of producing an acid upon exposure to actinic radiation; and optionally d) a sensitizer.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: August 31, 2004
    Assignee: Aprilis, Inc.
    Inventors: Erdem A. Cetin, Richard A. Minns, David A. Waldman
  • Patent number: 6781725
    Abstract: The present invention relates to a method and a system for the storage of data in the form of volume holograms which do not mutually overlap. The storage medium consists of a high-sensitive material in the form of a plate of thickness D, in which a single hologram is essentially shaped as a cylinder with the minimal possible cross-section. The signal light beam is modulated with data and directed onto the plate-shaped storage material by means of a lens or a conventional optical system, illuminating an area of the material which, for a given amount of data, is the smallest possible. To record a hologram, a reference light beam is used, incident upon the storage material either from the same direction as the signal beam, or opposite thereto. The hologram is only written in the portion where the signal and the reference beams overlap.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: August 24, 2004
    Assignee: Institut “Jozef Stefan”
    Inventor: Marko Zgonik
  • Patent number: 6780546
    Abstract: Blue-sensitized holographic media suitable for recording with a blue laser is disclosed. The blue-sensitized holographic media provides greater dynamic range and a higher sensitivity than a green-sensitized holographic media, thereby providing more rapid hologram writing times.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: August 24, 2004
    Assignee: InPhase Technologies, Inc.
    Inventors: Timothy J. Trentler, Melinda Schnoes
  • Publication number: 20040161709
    Abstract: Diffractive optical structures are written within crystal optical elements using ultrafast near-infrared laser pulses. The crystal optical elements preferably perform an optical function such as focusing or chromatically dispersing light. The diffractive optical structures within the crystal optical elements perform additional optical functions that augment or refine the functions performed by the crystal optical elements.
    Type: Application
    Filed: February 10, 2003
    Publication date: August 19, 2004
    Inventors: Joseph F. Schroeder, Alexander Streltsov
  • Patent number: 6775037
    Abstract: A dot matrix system, which uses an electronic display panel as a diffractive optical device to produce two laser beams. The interference pattern of these two beams, at the focal plane of a lens, forms a grating spot with a shape and beam profile determined by the wavefronts diffracted by the electronic display device. The invention uniquely combines aspects of the interfering beam prior art and the prior art using an imaging display. Instead of simply reducing a diffraction image on a display device as in the imaging display prior art, the invention puts two different Fourier transforms on the display, the laser beam interacts with these Fourier transforms, and a lens focuses the two beams on the recording medium, with the two beams interfering with each other to produce the desired grating pattern. Because multiple orders of the wavefront will be produced by the display device, a light blocking element is used, with an aperture to pass only the desired order(s) of the beams.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: August 10, 2004
    Assignee: K Laser Technology, Inc.
    Inventor: Wai-Hon Lee
  • Publication number: 20040141235
    Abstract: In a volume phase grating, a plurality of phase gratings for causing a refractive index of a substrate having an incident surface and a launched surface facing each other to be cyclically changed between the incident surface and the launched surface are so formed as to be inclined at a specified angle to the incident surface. The volume phase grating is constructed such that an incident light is caused to be obliquely incident on the incident surface, and an angle of inclination of the phase gratings to the incident surface is set such that the incident light obliquely incident on the incident surface is refracted at the incident surface and perpendicularly incident on the phase gratings.
    Type: Application
    Filed: December 24, 2003
    Publication date: July 22, 2004
    Applicant: KYOCERA CORPORATION
    Inventor: Michitaka Okuta
  • Publication number: 20040142248
    Abstract: A method for producing a holographic stereogram, comprising the steps of:
    Type: Application
    Filed: January 6, 2004
    Publication date: July 22, 2004
    Applicant: KONICA MINOLTA HOLDINGS, INC.
    Inventor: Noriyuki Kokeguchi
  • Publication number: 20040137334
    Abstract: The volume hologram recording photosensitive composition provided by the present invention contains at least a fluorine-contained photoreactive compound represented by the following formula (1): R1—R3—(CF2)n-R4-R2 wherein R1 and R2 are photoreactive groups which can be bonded to each other by photoreaction, and each of R3 and R4 is independently a single bond or a bivalent hydrocarbon group having 1 to 5 carbon atoms, and n is an integer of 1 or more. This volume hologram recording photosensitive composition is used to form a recording section of a recording medium, and then the section is exposed to light, whereby a bright volume hologram can be obtained.
    Type: Application
    Filed: July 8, 2003
    Publication date: July 15, 2004
    Inventors: Hiroyuki Otaki, Toshio Yoshihara, Yoshihito Maeno