Patents by Inventor Tatsuo Mikami

Tatsuo Mikami 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).

  • Publication number: 20140193601
    Abstract: A method for manufacturing a multilayer structure sheet for manufacturing an optical information recording medium having a multilayer structure with a plurality of recording layers comprises: an adhesive layer forming step of forming an adhesive layer on a first release sheet to obtain a first sheet; a recording layer forming step of forming a recording layer containing a polymer on a second release sheet or a release assisting layer formed on the second release sheet to obtain a second sheet; a laminating step of laminating the recording layer of the second sheet on the adhesive layer of the first sheet to obtain a third sheet in which the second sheet is laid on the first sheet; and a heating step of heating the second sheet.
    Type: Application
    Filed: March 11, 2014
    Publication date: July 10, 2014
    Applicant: FUJIFILM Corporation
    Inventors: Tatsuo MIKAMI, Hidehiro MOCHIZUKI, Akiko HENMI
  • Publication number: 20140153375
    Abstract: An optical information recording medium comprises recording layers which include a polymer binder and a dye dispersed in the polymer binder or include a polymer to which a dye is bonded, and each recording layer has a refractive index unchangeable under irradiation with a recording beam, with first and second interfaces being defined between the recording layer and two intermediate layers adjacent thereto. Irradiation of a region of the recording layer adjacent to the first interface or a region of the recording layer adjacent to the second interface with the recording beam causes the dye to absorb the recording beam and generate heat which in turn deforms the polymer in the recording layer, forming a protrusive shape protruding into an intermediate layer at the first or second interface whereby information is recordable in separate information layers at both of the first and the second interfaces.
    Type: Application
    Filed: February 7, 2014
    Publication date: June 5, 2014
    Applicant: FUJIFILM Corporation
    Inventors: Akiko HENMI, Tatsuo MIKAMI, Hidehiro MOCHIZUKI, Toshio SASAKI
  • Publication number: 20140120295
    Abstract: A multilayer structure sheet for manufacturing an optical information recording medium having a multilayer structure with a plurality of recording layers is disclosed. The multilayer structure sheet comprises at least one unit structure in which a pressure sensitive adhesive layer, a recording layer, a recording layer support layer having a glass transition temperature higher than that of the pressure sensitive adhesive layer, and a recording layer are laid one on top of another in this order, and a release sheet is attached to an outside of an outermost pressure sensitive adhesive layer.
    Type: Application
    Filed: January 9, 2014
    Publication date: May 1, 2014
    Applicant: FUJIFILM Corporation
    Inventors: Hidehiro MOCHIZUKI, Tatsuo MIKAMI, Toshiyuki KITAHARA
  • Publication number: 20140078878
    Abstract: The present invention provides a non-resonant two-photon absorption recording material containing a non-resonant polymer two-photon absorption compound, and the non-resonant two-photon absorption recording material wherein the main chain of the non-resonant polymer two-photon absorption compound contains at least one member selected from polystyrene, polyacrylate, polymethacrylate, polyester, polyurethane, polyether and polyimide, and also provides an optical information recording medium having a recording layer containing the recording material.
    Type: Application
    Filed: November 13, 2013
    Publication date: March 20, 2014
    Applicant: FUJIFILM CORPORATION
    Inventors: Hiroaki TSUYAMA, Masaomi MAKINO, Hidehiro MOCHIZUKI, Toshio SASAKI, Tatsuo MIKAMI
  • Publication number: 20140064053
    Abstract: A two-photon absorption material that can, thanks to a compound of, for example, the following formula (6), perform non-resonant two-photon absorption by light in the region shorter than 700 nm with high sensitivity and has sufficient recording/reproduction properties, a two-photon absorption recording material, a recording medium and a two-photon absorption compound usable therein are provided.
    Type: Application
    Filed: November 11, 2013
    Publication date: March 6, 2014
    Applicant: FUJIFILM Corporation
    Inventors: Hiroaki TSUYAMA, Masaharu AKIBA, Hidehiro MOCHIZUKI, Toshio SASAKI, Tatsuo MIKAMI
  • Patent number: 8530025
    Abstract: An optical information recording medium comprises a plurality of recording layers, and intermediate layers provided between the plurality of recording layers. The optical information recording medium has a recess for use in tracking, in a layer which is provided in a position farther, than the plurality of recording layers, from a light-incident side on which a beam emitted for recording/reading enters. A depth D of the recess is ?/4n where ? is a wavelength of the beam emitted for recording/reading, n is a refractive index of a layer with which the recess is filled.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: September 10, 2013
    Assignee: FUJIFILM Corporation
    Inventors: Tatsuo Mikami, Hidehiro Mochizuki
  • Publication number: 20130229901
    Abstract: An optical information recording medium 10 comprises a plurality of recording layers 14 and intermediate layers 15 each provided between the recording layers 14. Each of the recording layers 14 includes a polymer binder and dye dispersed in the polymer binder, and a thickness of each recording layer is equal to or greater than 50 nm. A first interface (near-side interface 18) is formed between a recording layer 14 and an intermediate layer 15 that is adjacent to the recording layer 14 on one side of the recording layer 14 in a thickness direction of the recording layer 14, and a second interface (far-side interface 19) is formed between the recording layer 14 and an intermediate layer 15 that is adjacent to the recording layer 14 on the other side of the recording layer 14 in the thickness direction of the recording layer 14.
    Type: Application
    Filed: April 17, 2013
    Publication date: September 5, 2013
    Applicant: FUJIFILM Corporation
    Inventors: Hidehiro MOCHIZUKI, Tatsuo MIKAMI
  • Patent number: 8526291
    Abstract: Optical information recording medium comprises: a plurality of recording layers 14, each of which undergoes a change in refractive index by irradiation with recording beam; and an intermediate layer 15 provided between recording layers 14. The recording layer 14 contains polymer binder and dye dispersed in the polymer binder, and at least in proximity to an interface (far-side interface 18) between the intermediate layer 15 and a recording layer 14 disposed adjacent to incident side of the intermediate layer 15 from which the recording beam enters the intermediate layer, the intermediate layer 15 has refractive index different from that of the recording layer 14. Glass transition temperature of the polymer binder is lower than melting point and decomposition point of the dye, and refractive index of the polymer binder changes by receiving heat generated when the dye absorbs the recording beam, whereby information is recordable in the recording layer.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: September 3, 2013
    Assignee: FUJIFILM Corporation
    Inventors: Hidehiro Mochizuki, Tatsuo Mikami, Shunichi Hoshino
  • Patent number: 8503281
    Abstract: An optical recording disc comprises: at least ten optical recording layers; a plurality of intermediate layers each interposed between adjacent optical recording layers; a base film configured to support the optical recording layers and the intermediate layers; a cover layer disposed opposite to the base film with the optical recording layers and the intermediate layers interposed therebetween. The optical recording disc is in the shape of a disc as a whole. The total thickness of the optical recording disc is not more than 300 micrometers, and the optical recording disc provides flexibility.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: August 6, 2013
    Assignee: FUJIFILM Corporation
    Inventors: Tatsuo Mikami, Toshiyuki Kitahara
  • Publication number: 20120320726
    Abstract: An optical recording disc comprises: at least ten optical recording layers; a plurality of intermediate layers each interposed between adjacent optical recording layers; a base film configured to support the optical recording layers and the intermediate layers; a cover layer disposed opposite to the base film with the optical recording layers and the intermediate layers interposed therebetween. The optical recording disc is in the shape of a disc as a whole. The total thickness of the optical recording disc is not more than 300 micrometers, and the optical recording disc provides flexibility.
    Type: Application
    Filed: February 2, 2011
    Publication date: December 20, 2012
    Applicant: FUJIFILM Corporation
    Inventors: Tatsuo Mikami, Toshiyuki Kitahara
  • Patent number: 8039630
    Abstract: The present invention relates to a cationic compound denoted by the general formula (I). In general formula (I), Ar1 and Ar2 each independently denote an optionally substituted aryl group or aromatic heterocyclic group, L1 denotes a single bond or a divalent linkage group, with at least one from among Ar1, Ar2 and L1 comprising one or more onium cations; R3 and R4 each independently denote a substituent and may form a ring with a benzene ring substituted; m3 and m4 each independently denote an integer ranging from 0 to 4, and plural R3s and R4s may be identical or different from each other when m3 and m4 are an integer ranging from 2 to 4.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: October 18, 2011
    Assignee: FUJIFILM Corporation
    Inventors: Kazumi Nii, Tatsuo Mikami
  • Patent number: 7767284
    Abstract: The object of the present invention is to provide an optical recording medium which comprises a substrate, and a first information layer and a second information layer disposed on the substrate, and an intermediate layer disposed between the first information layer and the second information layer, wherein any one of recording and reproducing is performed in the first information layer and the second information layer by irradiating a laser beam from the first information layer side, the second information layer comprises a protective layer, a second dye layer which comprises an organic dye, an oxidized layer, and a reflective layer in this order from the laser beam irradiation side, and the oxidized layer comprises an oxide which is a material constituting the reflective layer.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: August 3, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Michiaki Shinotsuka, Masaru Shinkai, Hiroyuki Iwasa, Tatsuo Mikami, Yuki Nakamura, Tohru Yashiro
  • Patent number: 7751286
    Abstract: An optical pickup unit for recording information on and/or reproducing information from a multilayer information recording medium including multiple recording surfaces in each of which a guide groove on which the information is to be recorded is spirally formed is disclosed. The optical pickup unit includes a light source, a diffraction element configured to split the light beam emitted from the light source into a main light beam and first and second sub light beams, an objective lens for focusing the main and sub light beams onto a recording surface of the multilayer information recording medium, and multiple light receiving elements each divided into light receiving parts so as to receive the main and sub light beams reflected from the recording surface. The focused first and second sub light beams are disposed at respective positions at least 3/2 tracks away from the focused main light beam on the recording surface.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: July 6, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Tetsuya Ogata, Tatsuo Mikami
  • Patent number: 7710855
    Abstract: The present invention relates to an optical recording medium containing a first substrate, a first information layer, an intermediate layer, a second information layer and a second substrate in this order, wherein the first information layer contains a first recording layer disposed on the first substrate and the second information layer contains a reflective layer, a second recording layer containing an organic dye and a protective layer which are disposed on the second substrate in this order; and the second recording layer contains an organic dye which is at least one elected from the group consisting of the specified squarylium metal chelate compounds.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: May 4, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Tohru Yashiro, Yuki Nakamura, Tatsuo Mikami, Ikuo Shimizu, Motoharu Kinugasa, Hiroshi Toyoda
  • Publication number: 20090130367
    Abstract: The present invention relates to a cationic compound denoted by the general formula (I). In general formula (I), Ar1 and Ar2 each independently denote an optionally substituted aryl group or aromatic heterocyclic group, L1 denotes a single bond or a divalent linkage group, with at least one from among Ar1, Ar2 and L1 comprising one or more onium cations; R3 and R4 each independently denote a substituent and may form a ring with a benzene ring substituted; m3 and m4 each independently denote an integer ranging from 0 to 4, and plural R3s and R4s may be identical or different from each other when m3 and m4 are an integer ranging from 2 to 4.
    Type: Application
    Filed: November 9, 2006
    Publication date: May 21, 2009
    Applicant: FUJIFILM Corporation
    Inventors: Kazumi Nii, Tatsuo Mikami
  • Publication number: 20080316890
    Abstract: The present invention relates to an optical recording medium containing a first substrate, a first information layer, an intermediate layer, a second information layer and a second substrate in this order, wherein the first information layer contains a first recording layer disposed on the first substrate and the second information layer contains a reflective layer, a second recording layer containing an organic dye and a protective layer which are disposed on the second substrate in this order; and the second recording layer contains an organic dye which is at least one elected from the group consisting of the specified squarylium metal chelate compounds.
    Type: Application
    Filed: June 30, 2005
    Publication date: December 25, 2008
    Inventors: Tohru Yashiro, Yuki Nakamura, Tatsuo Mikami, Ikuo Shimizu, Motoharu Kinugasa, Hiroshi Toyoda
  • Publication number: 20080291816
    Abstract: The object of the present invention is to provide an optical recording medium which includes a substrate, a first information layer and a second information layer, the first information layer and the second information layer are disposed on the substrate through an intermediate layer in a laminar structure; recording and reproducing is performed on each of the two information layers by laser beam irradiation from the first information layer side; the second information layer is provided with at least a reflective layer, a dielectric layer, and a second dye recording layer formed in this order; and the dielectric layer is formed from any one of materials selected from the group consisting of oxides, nitrides, sulfides, carbides or mixtures thereof from any one of elements which are not same as metal elements and semi-metal elements used for forming the reflective layer.
    Type: Application
    Filed: March 16, 2006
    Publication date: November 27, 2008
    Inventors: Yuki Nakamura, Tohru Yashiro, Tatsuo Mikami
  • Publication number: 20080274423
    Abstract: The optical information recording medium comprises a recording layer on a support, wherein the recording layer comprises a dye having a film-softening temperature of equal to or higher than 290° C.
    Type: Application
    Filed: April 29, 2008
    Publication date: November 6, 2008
    Applicant: FUJIFILM Corporation
    Inventors: Tatsuo Mikami, Kazumi Nii, Shuji Kanayama
  • Patent number: 7422838
    Abstract: A phase-change optical recording medium is disclosed including a supporting substrate and the following contiguous layers formed on the supporting substrate in the order recited such as a first dielectric layer, a recording layer, a second dielectric layer, a metal/alloy layer, and an ultraviolet light curing resinous layer. The recording layer is characterized by its uppermost recrystallization linear velocity ranging from about 5.0 m/sec to about 10.0 m/sec, which can be utilized in read/write/erase operations for the recording medium at linear velocities higher than the quad-speed as well.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: September 9, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Katsuyuki Yamada, Yuki Nakamura, Tatsuo Mikami, Eiji Noda, Kayo Katoh
  • Patent number: 7386364
    Abstract: A legged mobile robot gives up a normal walking motion and starts a tumbling motion when an excessively high external force or external moment is applied thereto and a behavior plan of a foot part thereof is disabled. At this time, the variation amount ?S/?t of the area S of a support polygon of the body per time t is minimized and the support polygon when the body drops onto a floor is maximized to distribute an impact which acts upon the body from the floor when the body drops onto the floor to the whole body to suppress the damage to the body to the minimum. Further, the legged mobile robot autonomously restores a standing up posture from an on-floor posture thereof such as a supine posture or a prone posture.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: June 10, 2008
    Assignees: Sony Corporation, Yamaguchi, Jinichi
    Inventors: Tatsuo Mikami, Jinichi Yamaguchi, Atsushi Miyamoto