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: 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
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Patent number: 7154646Abstract: An optical recording/reproducing apparatus having excellent resistance against vibration and noise. In recording, coherent light is polarization-modulated with a spatial light modulator to generate signal light and reference light whose polarization directions are crossed at right angles. The signal light permeates a polarizing beam splitter, and is incident to a quarter wavelength plate. The reference light passes through a passing hole, is diffused by a light diffuser and is incident to the quarter wavelength plate. The reference and signal light are converted into circularly polarized light which revolve in directions opposite to each other and condensed by a condenser lens, and then a predetermined area of an optical recording medium is irradiated with the reference and signal light. Thus, the reference and signal light are generated by modulating the incident light from the same light source and are coaxially incident to the polarizing beam splitter.Type: GrantFiled: April 27, 2006Date of Patent: December 26, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Katsunori Kawano, Jiro Minabe, Tatsuya Maruyama, Shin Yasuda, Norie Matsui, Tsutomu Ishii, Kazuhiro Hama
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Patent number: 7154645Abstract: A holographic recording method and a holographic recording apparatus capable of selectively rewriting or erasing only desired data without degrading data other than the desired data are provided. Holograms are multiple recorded per file, and page data in one file is multiple recorded, while page data in one file and page data in another file are not multiple recorded. Therefore, only the desired file can be selectively rewritten or erased without degrading the other files.Type: GrantFiled: March 10, 2004Date of Patent: December 26, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Shin Yasuda, Katsunori Kawano, Jiro Minabe, Tatsuya Maruyama, Norie Matsui
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Publication number: 20060245020Abstract: A hologram recording method is provided. The method includes eliminating a DC component from a Fourier transformation image of a signal light for expressing binary digital data as a brightness image, and irradiating an optical recording medium simultaneously with the signal light from which the DC component has been eliminated and a reference light to record an image edge portion of the signal light onto the optical recording medium as a hologram.Type: ApplicationFiled: January 12, 2006Publication date: November 2, 2006Applicant: FUJI XEROX CO., LTD.Inventors: Katsunori Kawano, Koichi Haga, Shin Yasuda, Makoto Furuki, Jiro Minabe, Yasuhiro Ogasawara, Kazuhiro Hayashi, Hisae Yoshizawa
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Publication number: 20060215243Abstract: There is provided a hologram recording medium having: a recording layer at which a hologram can be recorded by illumination of writing light; and a protective layer provided on the recording layer in order to protect the recording layer, a water absorbency of the protective layer being less than or equal to 0.01%.Type: ApplicationFiled: August 17, 2005Publication date: September 28, 2006Applicant: FUJI XEROX CO., LTD.Inventors: Koichi Haga, Kazuhiro Hayashi, Katsunori Kawano, Hisae Yoshizawa, Jiro Minabe, Yasuhiro Ogasawara, Shin Yasuda, Norie Matsui
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Publication number: 20060203315Abstract: There is provided a hologram recording medium having: a non-optical-quality sheet member; a recording layer at which a hologram can be recorded by illumination of writing light, or at which a hologram is recorded by illumination of writing light; a reflecting layer provided between the sheet member and the recording layer, a surface of the reflecting layer having a ten-point average roughness Rz that is less than a wavelength of reading light which surface contacts the recording layer, and due to illumination of the reading light from a recording layer side, the reflecting layer reflecting the reading light and diffracted light diffracted by a hologram; and a protective layer provided on the recording layer and protecting the recording layer.Type: ApplicationFiled: July 14, 2005Publication date: September 14, 2006Inventors: Koichi Haga, Kazuhiro Hayashi, Katsunori Kawano, Hisae Yoshizawa, Jiro Minabe, Yasuhiro Ogasawara, Shin Yasuda, Norie Matsui
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Publication number: 20060193022Abstract: An optical recording/reproducing apparatus having excellent resistance against vibration and noise. In recording, coherent light is polarization-modulated with a spatial light modulator to generate signal light and reference light whose polarization directions are crossed at right angles. The signal light permeates a polarizing beam splitter, and is incident to a quarter wavelength plate. The reference light passes through a passing hole, is diffused by a light diffuser and is incident to the quarter wavelength plate. The reference and signal light are converted into circularly polarized light which revolve in directions opposite to each other and condensed by a condenser lens, and then a predetermined area of an optical recording medium is irradiated with the reference and signal light. Thus, the reference and signal light are generated by modulating the incident light from the same light source and are coaxially incident to the polarizing beam splitter.Type: ApplicationFiled: April 27, 2006Publication date: August 31, 2006Applicant: FUJI XEROX CO., LTD.Inventors: Katsunori Kawano, Jiro Minabe, Tatsuya Maruyama, Shin Yasuda, Norie Matsui, Tsutomu Ishii, Kazuhiro Hama
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Patent number: 7083128Abstract: A shredder that shreds a recording medium which includes, on a surface thereof, an image forming portion and a holographic memory portion in which data is recorded. The shredder includes a data destroying unit that destroys at least the data recorded in the holographic memory portion and a shredding unit that shreds the entire recording medium. Thus, when a recording medium to which has been added a holographic memory portion in which useful information is recorded is to be discarded, the data(information) recorded in the holographic memory portion can be safely destroyed so that the data can no longer be read.Type: GrantFiled: August 25, 2004Date of Patent: August 1, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Hisae Yoshizawa, Katsunori Kawano, Jiro Minabe, Kazuhiro Hayashi, Yasuhiro Ogasawara, Shin Yasuda, Norie Matsui
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Patent number: 7064875Abstract: An optical recording/reproducing apparatus having excellent resistance against vibration and noise is provided. In recording, coherent light is polarization-modulated with a spatial light modulator to generate signal light and reference light whose polarization directions are crossed at right angles with each other. The signal light permeates a polarizing beam splitter, and is incident to a quarter wavelength plate. The reference light passes through a passing hole, is diffused by a light diffuser and is incident to the quarter wavelength plate. The reference and signal light are converted into circularly polarized light which revolve in directions opposite to each other and condensed by a condenser lens, and then a predetermined area of an optical recording medium is irradiated with the reference and signal light. Thus, the reference and signal light are generated by modulating the incident light from the same light source and are coaxially incident to the polarizing beam splitter.Type: GrantFiled: September 12, 2003Date of Patent: June 20, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Katsunori Kawano, Jiro Minabe, Tatsuya Maruyama, Shin Yasuda, Norie Matsui, Tsutomu Ishii, Kazuhiro Hama
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Publication number: 20060092488Abstract: 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: ApplicationFiled: December 2, 2005Publication date: May 4, 2006Applicant: FUJI XEROX CO., LTD.Inventors: Norie Matsui, Katsunori Kawano, Jiro Minabe, Tatsuya Maruyama, Shin Yasuda, Kazuhiro Hama, Tsutomu Ishii
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Patent number: 7034970Abstract: 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: GrantFiled: September 9, 2003Date of Patent: April 25, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Norie Matsui, Katsunori Kawano, Jiro Minabe, Tatsuya Maruyama, Shin Yasuda, Kazuhiro Hama, Tsutomu Ishii
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Publication number: 20060077851Abstract: 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 separated by the light separator so that the reference beam and the signal beam may be irradiated simultaneously onto an optical recording medium, a spatial light modulator disposed in the optical path of the light for the signal beam for modulating the light for the signal beam in accordance with a supplied recording signal to create signal beam for recording a hologram, and diffused light irradiator for irradiating diffused light simultaneously with the reference beam at least onto an area of the optical recording medium where the reference beam is irradiated.Type: ApplicationFiled: February 15, 2005Publication date: April 13, 2006Applicant: FUJI XEROX CO., LTD.Inventors: Shin Yasuda, Jiro Minabe, Yasuhiro Ogasawara, Kazuhiro Hayashi, Hisae Yoshizawa, Koichi Haga, Katsunori Kawano
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Publication number: 20060050339Abstract: A hologram recording method includes generating a signal beam with data formed by superimposing pattern data, the pattern data representing a pattern in which a large number of plural kinds of pixels having different tone values are arranged in a two-dimensional manner, on an image data of respective pixels represented by tone values corresponding to density, and recording a hologram by irradiating a converted beam formed by Fourier transformation of the generated signal beam with a lens and a reference beam to an optical recording medium.Type: ApplicationFiled: February 8, 2005Publication date: March 9, 2006Applicant: FUJI XEROX CO., LTD.Inventors: Katsunori Kawano, Jiro Minabe, Yasuhiro Ogasawara, Kazuhiro Hayashi, Hisae Yoshizawa, Shin Yasuda, Koichi Haga
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Publication number: 20060007513Abstract: The present invention discloses a hologram-recording method, comprising recording a reflection-type volume hologram onto an optical recording medium by irradiating the optical recording medium with a modulated beam obtained by spatially modulating a laser beam and a diffused beam obtained by diffusing the modulated beam, coaxially but from different sides of the optical recording medium, respectively. The invention provides a hologram-recording method, an optical recording medium, and a hologram-recording device that enables on-demand recording of a reflection-type volume hologram which reliably prohibits forgery or alteration with a simple device configuration.Type: ApplicationFiled: January 25, 2005Publication date: January 12, 2006Applicant: Fuji Xerox Co., Ltd.Inventors: Shin Yasuda, Yasuhiro Ogasawara, Jiro Minabe, Katsunori Kawano, Kazuhiro Hayashi, Hisae Yoshizawa, Koichi Haga
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Publication number: 20050265134Abstract: The present invention provides an optical recording material for recording information by utilizing a change in absorption, a change in refractive index or a change in shape accompanying irradiation with light. The optical recording material includes a polymer or an oligomer which has a side chain containing one or more mesogenic groups and linked to a main chain and which contains two or more kinds of photoresponsive groups, each of which are different in absorption spectrum. The invention also provides an optical recording medium containing the optical recording material in a photosensitive layer. Further, the invention provides an optical recording reproduction apparatus for recording and/or reproducing information by using the optical recording medium.Type: ApplicationFiled: January 19, 2005Publication date: December 1, 2005Applicant: FUJI XEROX CO., LTD.Inventors: Jiro Minabe, Shin Yasuda, Hiroo Takizawa
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Publication number: 20050231774Abstract: 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: ApplicationFiled: December 8, 2004Publication date: October 20, 2005Applicant: 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: 20050213175Abstract: A postprocessing apparatus for conducting postprocessing on an image forming member, including a receiving unit for receiving an image forming member having an image formed thereon, and an attaching unit for attaching a hologram recording medium in which a hologram can be written, to the image forming member. The postprocessing apparatus further includes a recording unit for writing related information corresponding to image formed on the image forming member, onto the hologram recording medium.Type: ApplicationFiled: September 30, 2004Publication date: September 29, 2005Applicant: FUJI XEROX CO., LTD.Inventors: Hisae Yoshizawa, Katsunori Kawano, Jiro Minabe, Kazuhiro Hayashi, Yasuhiro Ogasawara, Shin Yasuda, Norie Matsui
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Publication number: 20050213137Abstract: The present invention provides an image formation device including: an image reading section which reads an image from an image formation member, at which image formation member the image is formed and a hologram recording medium is mounted, associated information relating to the image being stored as a hologram in the hologram recording medium; an information acquisition section which acquires the stored associated information from the hologram recording medium; an image processing section which processes the image read by the image reading section in accordance with the associated information acquired by the information acquisition section; and an image formation section which forms an image processed by the image processing section.Type: ApplicationFiled: October 4, 2004Publication date: September 29, 2005Applicant: FUJI XEROX CO., LTD.Inventors: Katsunori Kawano, Hisae Yoshizawa, Jiro Minabe, Kazuhiro Hayashi, Yasuhiro Ogasawara, Shin Yasuda, Norie Matsui
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Publication number: 20050206984Abstract: 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: ApplicationFiled: November 10, 2004Publication date: September 22, 2005Applicants: 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: 20050207312Abstract: The present invention provides an optical information reading device includes: a light source that irradiates, with reference beam, a hologram recorded in an optical recording medium; a reading unit that reads information from a holographic image reconstructed by the reference beam being diffracted by the hologram; a housing; a contact member of the housing contacting a paper; an open portion formed in the contact member, through which the optical recording medium is exposed and towards which the reference beam is emitted; an alignment mark formed at a periphery of the open portion, the reference beam irradiating the hologram satisfying a holographic image reconstruction condition by the alignment mark being aligned with an optical recording medium alignment mark recorded on the optical recording medium; and a viewing portion that is positioned in the housing and through which the alignment mark and the optical recording medium alignment mark are visible.Type: ApplicationFiled: September 14, 2004Publication date: September 22, 2005Applicant: FUJI XEROX CO., LTD.Inventors: Yasuhiro Ogasawara, Kazuhiro Hayashi, Katsunori Kawano, Jiro Minabe, Shin Yasuda, Hisae Yoshizawa