Patents by Inventor Hironori Ota

Hironori Ota 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: 20070184386
    Abstract: The present invention provides a high level optical recording material which is capable of recording and reading by a blue laser with a short wavelength. An optical recording material comprises an organic dye compound A whose absorption maximum wavelength (?max) is not less than 340 nm and not more than 440 nm and a metal-complex compound B whose absorption maximum wavelength (?max) is not less than 500 nm and not more than 900 nm, the content of the organic dye compound A is higher than the content of the metal-complex compound B, and light resistance x determined by a predetermined method is not less than 30%.
    Type: Application
    Filed: February 25, 2005
    Publication date: August 9, 2007
    Applicants: MITSUBISHI CHEMICAL CORPORATION, MITSUBISHI KAGAKU MEDIA CO., LTD., HITACHI MAXELL LTD.
    Inventors: Takashi Miyazawa, Hideyuki Kubo, Hideki Nagano, Hironori Ota
  • Publication number: 20060190958
    Abstract: An optical recording medium including two recording layers, each containing an organic dye includes: a first disk substrate formed by laminating a first recording layer and a translucent intermediate layer sequentially on a first transparent substrate made of polycarbonate or the like; and a second disk substrate formed by laminating a reflective layer, a second recording layer, and an interface layer sequentially on a second substrate. The first and the second disk substrates are laminated with a transparent adhesive layer interposed therebetween in a manner that the translucent intermediate layer faces the interface layer. A reflectivity (R1) at a portion of a recording mark formed on any of the first and the second recording layers becomes higher than a reflectivity (R0) at a portion on the recording layer where the recording mark is not formed (R1>R0).
    Type: Application
    Filed: February 21, 2006
    Publication date: August 24, 2006
    Applicant: HITACHI MAXELL, LTD.
    Inventors: Yoshiyuki Nagataki, Hironori Ota
  • Publication number: 20060104194
    Abstract: An optical information-recording medium, which is provided with a substrate and a light-absorbing layer formed of a dye material on the substrate, includes a user information area in which a concave/convex pattern including spiral-shaped or concentric grooves are formed, and BCA which is provided on an inner circumferential side of the user information area and in which information is recorded with a bar code, wherein a concave/convex pattern, which is different from the concave/convex pattern in the user information area, is formed in BCA. With this construction, an optical information-recording medium, on which BCA information is reproduced without performing any tracking, is provided, wherein a BCA reproduced signal having a satisfactory signal quality is obtained from BCA.
    Type: Application
    Filed: November 15, 2005
    Publication date: May 18, 2006
    Applicant: HITACHI MAXELL, LTD.
    Inventors: Hironori Ota, Yoshiyuki Nagataki, Toshinori Sugiyama
  • Publication number: 20050063274
    Abstract: An information recording method allows optical information having a recording mark length smaller than a spot diameter of laser light to be recorded on an optical recording medium having a recording layer, at high density by laser light pulse application. The information recording method has: a power calibration step of determining a recording power for recording a signal having a predetermined signal length in the recording layer using the laser light; and a complementing step of complementing, based on the recording power determined in the power calibration step, a recording power for recording a signal having a signal length equal to or less than ½ of the spot diameter of the laser light in the recording layer using the laser light. In the information recording method, for example, an extremely small mark, such as a 2T signal, can be precisely formed.
    Type: Application
    Filed: September 16, 2004
    Publication date: March 24, 2005
    Applicants: Hitachi Maxell, LTD., Mitsubishi Chemical Corporation, Mitsubishi Kagaku Media Co., Ltd.
    Inventors: Hideki Nagano, Hironori Ota, Hideyuki Kubo, Takeshi Kuriwada, Yutaka Kurose