Patents by Inventor Shin Yasuda
Shin Yasuda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20080024848Abstract: There is provided a hologram recording method including: generating light of a pattern in which a plurality of unit blocks, which include at least one pixel and express luminance, are arrayed, the pattern being sectioned into a region of a signal beam and a region of a reference beam, and being generated such that the region of the reference beam includes a plurality of unit blocks whose numbers of pixels are different; collecting the generated light at a common optical system, and illuminating it onto an optical recording medium; and recording, as a hologram, data which the signal beam expresses.Type: ApplicationFiled: February 8, 2007Publication date: January 31, 2008Applicant: FUJI XEROX CO., LTD.Inventors: Katsunori Kawano, Jiro Minabe, Koichi Haga, Yasuhiro Ogasawara, Shin Yasuda, Kazuhiro Hayashi, Hisae Yoshizawa, Makoto Furuki
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Publication number: 20080013138Abstract: A hologram recording material is used for recording information by at least irradiation with light. The hologram recording material includes photoresponsive molecules, liquid crystal molecules, and particles having an average particle diameter of one tenth or less of a wavelength of light used in the information recording.Type: ApplicationFiled: February 21, 2007Publication date: January 17, 2008Applicant: FUJI XEROX CO., LTD.Inventors: Hisae Yoshizawa, Jiro Minabe, Yasuhiro Ogasawara, Katsunori Kawano, Kazuhiro Hayashi, Shin Yasuda, Koichi Haga, Makoto Furuki
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Patent number: 7319550Abstract: While Fourier transformation of a signal light beam is performed to perform recording during holographic recording so that a focal point is formed outside a holographic recording layer (defocus recording), an aperture is arranged on an outgoing side of the reproduced signal light beam (reproduction light beam), the reproduction light beam is focused at the aperture, and low-order components of a Fourier transform image of the reproduction light beam are selectively transmitted to detect only the transmitted light beam. Therefore, information recorded as the hologram in the holographic recording layer can be reproduced with high S/N ratio from the holographic recording layer added onto a support body, particularly onto a sheet member having non-optical quality such as paper and a plastic card.Type: GrantFiled: December 8, 2004Date of Patent: January 15, 2008Assignee: Fuji Xerox Co., Ltd.Inventors: Kazuhiro Hayashi, Katsunori Kawano, Yasuhiro Ogasawara, Jiro Minabe, Shin Yasuda, Hisae Yoshizawa, Norie Matsui
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Publication number: 20070291342Abstract: A hologram recording method for recording information of signal light as holograms in an optical recording medium, which includes illuminating signal light at the optical recording medium; illuminating reference light at the optical recording medium simultaneously with the signal light such that an interference pattern is formed by the signal light and the reference light intersecting in the optical recording medium; and shifting a region in the optical recording medium at which the signal light and the reference light intersect, by shifting an illumination position of the reference light along an optical axis of the signal light, thereby recording a plurality of holograms in the recording medium.Type: ApplicationFiled: November 28, 2006Publication date: December 20, 2007Applicant: FUJI XEROX CO., LTD.Inventors: Shin Yasuda, Katsunori Kawano, Jiro Minabe, Koichi Haga, Yasuhiro Ogasawara, Kazuhiro Hayashi, Hisae Yoshizawa, Makoto Furuki
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Patent number: 7307768Abstract: A hologram is recorded by irradiating, with a reference light beam, a region corresponding to an intensity distribution of a signal light beam on an optical recording medium. For example, the reference light beam having the intensity distribution which substantially coincides with the intensity distribution of the signal light beam is generated, and only the region which substantially coincides with the region irradiated by the signal light beam (i.e., the signal light beam defocused region) is irradiated with the reference light beam. This enables only the necessary region to be exposed and the regions which need not be exposed not to be exposed. Accordingly, the hologram can be recorded without losing information of the signal light beam and thus high-density recording can be realized.Type: GrantFiled: February 23, 2004Date of Patent: December 11, 2007Assignee: Fuji Xerox Co., Ltd.Inventors: Katsunori Kawano, Jiro Minabe, Shin Yasuda, Tatsuya Maruyama, Norie Matsui
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Publication number: 20070236763Abstract: An optical recording method includes providing an optical recording medium capable of forming both a refractive index grating and an absorption grating by light irradiation; Fourier transforming with the same lens a signal beam that represents binary digital data with a brightness image and a reference beam such that they are focused at a point outside the optical recording medium; irradiating the Fourier transformed signal beam and reference beam simultaneously onto the optical recording medium and forming a diffraction grating at the optical recording medium according to an interference fringe between the signal beam and the reference beam, or according to an interference fringe within the signal beam itself, and recording the signal beam as a hologram.Type: ApplicationFiled: November 27, 2006Publication date: October 11, 2007Applicant: FUJI XEROX CO., LTD.Inventors: Jiro Minabe, Yasuhiro Ogasawara, Katsunori Kawano, Koichi Haga, Shin Yasuda, Kazuhiro Hayashi, Hisae Yoshizawa, Makoto Furuki
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Patent number: 7262892Abstract: There is provided a hologram reconstruction method including: onto an optical recording medium in which a hologram is recorded by simultaneously irradiating the Fourier transformed signal beam representing a digital data with a bright and dark image and removing a DC component and the Fourier transformed reference beam thereon, irradiating a first reference beam for reading out that is the same as the reference beam to generate a first diffracted light generated by the recorded hologram, and synthesizing a DC component of a predetermined phase with the generated first diffracted light to generate a first synthesized light; detecting an inverse Fourier transformed image of the first synthesized light to obtain first image data; irradiating a second reference beam for reading out that differs from the reference beam onto the hologram recorded on the optical recording medium to generate a second diffracted light from the recorded hologram, and synthesizing a DC component of a predetermined phase with the generatType: GrantFiled: December 4, 2006Date of Patent: August 28, 2007Assignee: Fuji Xerox Co., Ltd.Inventors: Shin Yasuda, Jiro Minabe, Katsunori Kawano, Yasuhiro Ogasawara, Koichi Haga, Kazuhiro Hayashi, Hisae Yoshizawa, Makoto Furuki
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Publication number: 20070195388Abstract: A hologram recording method, which records signal light onto an optical recording medium as a hologram, includes: placing a signal light region, which generates signal light, and a reference light region, which generates reference light, symmetrically with respect to an optical axis of coherent light by displaying, on a spatial light modulator which spatially modulates the incident coherent light, a pattern which divides a modulating region into a plurality of regions; generating signal light and reference light by modulating the incident coherent light by the spatial light modulator; simultaneously and coaxially illuminating, onto a reflecting-type optical recording medium, the signal light and the reference light generated from the signal light region and the reference light region disposed symmetrically to one another; and recording the signal light on the optical recording medium as a hologram.Type: ApplicationFiled: July 27, 2006Publication date: August 23, 2007Applicant: Fuji Xerox Co., Ltd.Inventors: Makoto Furuki, Katsunori Kawano, Shin Yasuda, Jiro Minabe, Koichi Haga, Yasuhiro Ogasawara, Kazuhiro Hayashi, Hisae Yoshizawa
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Publication number: 20070184234Abstract: In the present invention, a photosensitive layer of an optical recording medium includes a photo-responsive high-molecular compound comprising a photo-responsive group (e.g., an azobenzene derivative) which is geometrically isomerized by light radiation, and a liquid crystal linear mesogen group (e.g., a biphenyl derivative), wherein the photo-responsive group and the linear mesogen group are respectively bonded as side chains. The invention provides an optical recording medium enabling large scale recording by making the photosensitive layer thick without impairing recording characteristics. The photo-responsive high-molecular compound preferably comprises an aromatic ring on a main chain. Further, the photo-responsive high-molecular compound preferably comprises a structural unit which is capable of forming a liquid-crystalline or crystalline polymer and a structural unit which is capable of forming an amorphous polymer.Type: ApplicationFiled: April 3, 2007Publication date: August 9, 2007Inventors: Jiro Minabe, Tatsuya Maruyama, Katsunori Kawano, Shin Yasuda
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Publication number: 20070146846Abstract: A hologram reproduction method for reproducing a hologram from an optical recording medium in which the hologram is recorded by Fourier transforming a signal light, in which digital data is represented by an image of intensity distribution, and a reference light, and simultaneously irradiating the lights in a state in which a direct current component is removed from at least the Fourier transformed signal light onto the optical recording medium is provided. The method including: irradiating a read out reference light onto the optical recording medium, and generating a diffracted light from the recorded hologram; generating all or a part of a direct current component contained in a Fourier transformed image of the signal light; combining the diffracted light and the generated all or a part of the direct current component, and generating a combined beam; and reproducing the signal light by inverse-Fourier transforming the combined beam.Type: ApplicationFiled: September 27, 2006Publication date: June 28, 2007Applicant: FUJI XEROX CO., LTD.Inventors: Shin Yasuda, Katsunori Kawano, Koichi Haga, Jiro Minabe, Yasuhiro Ogasawara, Kazuhiro Hayashi, Hisae Yoshizawa, Makoto Furuki
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Publication number: 20070147801Abstract: There is provided a data playback method including: acquiring first image data by illuminating reference light for reading onto an optical recording medium on which a hologram has been recorded by Fourier transforming and simultaneously illuminating reference light and signal light expressing digital data as a light-and-dark image, and detecting an inverse Fourier-transform image of diffracted light which is diffracted by the recorded hologram; acquiring second image data, which is a reversal image of the first image data, by generating combined light by combining the diffracted light and a dc component whose phase is different than a phase of a dc component of the signal light included in the diffracted light, and detecting an inverse Fourier-transform image of the combined light; and computing a difference in luminance for each pixel of the light-and-dark image, by carrying out computing processing by using the first and second image data.Type: ApplicationFiled: July 7, 2006Publication date: June 28, 2007Applicant: Fuji Xerox Co., Ltd.Inventors: Shin Yasuda, Yasuhiro Ogasawara, Jiro Minabe, Katsunori Kawano, Koichi Haga, Kazuhiro Hayashi, Hisae Yoshizawa, Makoto Furuki
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Patent number: 7236277Abstract: A holographic recording medium has at least a recording layer with a thickness of L which comprises a recording layer material having an absorption coefficient of ? and containing a photorefractive material, wherein the optical density ?L represented by the product of the absorption coefficient ? and the thickness L is in the range from 0.3 to 2.0.Type: GrantFiled: November 10, 2004Date of Patent: June 26, 2007Assignees: Fuji Xerox Co., Ltd., Fuji Photo Film Co., Ltd.Inventors: Katsunori Kawano, Makoto Furuki, Jiro Minabe, Shin Yasuda, Hiroo Takizawa, Kazuhiro Hayashi, Yasuhiro Ogasawara, Hisae Yoshizawa
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Publication number: 20070133113Abstract: There is proposed a hologram recording method that includes: generating signal light by superimposing a periodic intensity distribution or phase distribution on an intensity distribution of light that expresses binary digital data as a light/dark image; Fourier transforming the signal light; illuminating Fourier transformed signal light and reference light simultaneously on an optical recording medium; and recording the signal light as a hologram.Type: ApplicationFiled: July 14, 2006Publication date: June 14, 2007Applicant: Fuji Xerox Co., Ltd.Inventors: Jiro Minabe, Katsunori Kawano, Yasuhiro Ogasawara, Koichi Haga, Shin Yasuda, Kazuhiro Hayashi, Hisae Yoshizawa, Makoto Furuki
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Patent number: 7230747Abstract: 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 position as the predetermined position as a hologram. Alternatively, 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 a position different from the predetermined position as a hologram easily.Type: GrantFiled: March 15, 2004Date of Patent: June 12, 2007Assignee: Fuji Xerox Co., Ltd.Inventors: Shin Yasuda, Katsunori Kawano, Jiro Minabe, Tatsuya Maruyama, Norie Matsui
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Publication number: 20070115790Abstract: According to an aspect of the invention, there is provided a holographic recording medium including a recording layer in which information is recorded by irradiating a signal light and a reference light simultaneously to the layer, and a reflecting track on which a servo signal light is reflected, the reflecting track being formed on or above a recording layer surface to which the signal light is irradiated.Type: ApplicationFiled: June 30, 2006Publication date: May 24, 2007Applicant: FUJI XEROX CO., LTD.Inventors: Katsunori Kawano, Koichi Haga, Jiro Minabe, Yasuhiro Ogasawara, Shin Yasuda, Kazuhiro Hayashi, Hisae Yoshizawa, Makoto Furuki
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Publication number: 20070117027Abstract: A hologram-recording material, including a photoresponsive molecule, a reactive molecule having an intrinsic birefringence, and a photopolymerization initiator that accelerates polymerization and/or crosslinking of the reactive molecule having an intrinsic birefringence, a content of the photopolymerization initiator being in a range of less than about 0.1 wt % relative to the hologram-recording material, and, a content of the reactive molecule having an intrinsic birefringence being in a range of about 30 to about 80 wt % relative to the hologram-recording material.Type: ApplicationFiled: October 13, 2006Publication date: May 24, 2007Applicant: FUJI XEROX CO., LTD.Inventors: Hisae Yoshizawa, Jiro Minabe, Yasuhiro Ogasawara, Katsunori Kawano, Kazuhiro Hayashi, Shin Yasuda, Koichi Haga
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Patent number: 7218597Abstract: 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 changed and diffraction efficiencies of the holograms of the plurality of pages becomes equal.Type: GrantFiled: February 17, 2004Date of Patent: May 15, 2007Assignee: Fuji Xerox Co., Ltd.Inventors: Shin Yasuda, Katsunori Kawano, Jiro Minabe, Tatsuya Maruyama, Norie Matsui
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Publication number: 20070065019Abstract: A two-dimensional coding method includes: using a two-dimensional image containing plural reference pixels each having a different brightness and data pixels representing data in accordance with brightness; and coding a binary sequence of plural bits to be recorded as a hologram by matching the brightness level of the data pixel based on the brightnesses of the plural reference pixels.Type: ApplicationFiled: February 7, 2006Publication date: March 22, 2007Applicant: FUJI XEROX CO., LTD.Inventors: Shin Yasuda, Jiro Minabe, Katsunori Kawano, Yasuhiro Ogasawara, Kazuhiro Hayashi, Hisae Yoshizawa, Koichi Haga, Makoto Furuki
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Publication number: 20070047037Abstract: A hologram recording medium including: a recording layer on which a hologram can be record as a diffraction grating by inducing a change in a refraction factor according to the light intensity distribution of writing light due to irradiation with the writing light; a reflection layer that reflects, on the recording layer side thereof, diffracted light diffracted by the hologram recorded on the recording layer due to irradiation with reading light having a wavelength different from that of the writing light; and an absorption layer that absorbs the writing light transmitted through the recording layer.Type: ApplicationFiled: February 8, 2006Publication date: March 1, 2007Applicant: FUJI XEROX CO., LTD.Inventors: Hisae Yoshizawa, Katsunori Kawano, Shin Yasuda, Jiro Minabe, Yasuhiro Ogasawara, Kazuhiro Hayashi, Koichi Haga, Makoto Furuki
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Publication number: 20070041066Abstract: A hologram recording method comprising recording information of signal light as a reflection-type hologram on an optical recording medium, by illuminating the signal light and reference light on a same axis and from different sides of the optical recording medium is provided. Further, a hologram recording device including: a signal light illuminating section illuminating signal light onto an optical recording medium; and a reference light illuminating section illuminating reference light of a same axis as the signal light, onto the optical recording medium from a different side than the signal light is provided.Type: ApplicationFiled: January 26, 2006Publication date: February 22, 2007Applicant: Fuji Xerox Co., Ltd.Inventors: Shin Yasuda, Katsunori Kawano, Koichi Haga, Jiro Minabe, Makoto Furuki, Yasuhiro Ogasawara, Kazuhiro Hayashi, Hisae Yoshizawa