Patents by Inventor Atsunobu Fukuda

Atsunobu Fukuda 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).

  • Holographic information recording/reproducing apparatus
    Patent number: 7804758
    Abstract: An information recording/reproducing apparatus can suppress generation of stray light and prevent aggravation of the SN (signal to noise) ratio at the time of reproduction. If the angle of incidence of reference beam relative to the information recording medium (transmission-type disk 119 or reflection-type disk 213) at the time of recording is ?1, the angle of incidence of reference beam relative to the information recording medium at the time of reproduction is ?2 and the angle of incidence of reference beam reentering the information recording medium relative to the information recording medium at the time of reproduction is ?3, the angle of the galvano mirror for changing the angle of incidence of reference beam and the angle of the galvano mirror for reentering reference beam into the information recording medium are controlled so as to establish relationships of ?1??2 and ?1=?3.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: September 28, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Atsunobu Fukuda
  • HOLOGRAPHIC INFORMATION RECORDING/REPRODUCING APPARATUS
    Publication number: 20080186830
    Abstract: An information recording/reproducing apparatus can suppress generation of stray light and prevent aggravation of the SN (signal to noise) ratio at the time of reproduction. If the angle of incidence of reference beam relative to the information recording medium (transmission-type disk 119 or reflection-type disk 213) at the time of recording is ?1, the angle of incidence of reference beam relative to the information recording medium at the time of reproduction is ?2 and the angle of incidence of reference beam reentering the information recording medium relative to the information recording medium at the time of reproduction is ?3, the angle of the galvano mirror for changing the angle of incidence of reference beam and the angle of the galvano mirror for reentering reference beam into the information recording medium are controlled so as to establish relationships of ?1??2 and ?1=?3.
    Type: Application
    Filed: January 17, 2008
    Publication date: August 7, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Atsunobu Fukuda