Patents by Inventor Katsunori Kawano
Katsunori Kawano 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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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
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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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Patent number: 7142336Abstract: A recording medium including a storage part to hold a medium identifier intrinsic to each recording medium, and a hologram generated using a reference beam modulated with the medium identifier. Preferably, the hologram is fixed on a surface of the recording medium.Type: GrantFiled: February 3, 2005Date of Patent: November 28, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Katsunori Kawano, Norie Matsui, Makoto Furuki, Akira Tateishi
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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