Patents by Inventor Katsuhiro Agatsuma

Katsuhiro Agatsuma 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).

  • Laser system
    Patent number: 7580433
    Abstract: A laser system includes a laser diode that oscillates in a multi-mode and has characteristics in which its oscillation wavelength varies with temperature, a grating that receives a light beam emitted from the laser diode and returns a diffracted beam to the laser diode, a mechanism that changes the wavelength of the diffracted beam returned to the laser diode, a wavelength detector that detects the wavelength of an output beam which is the same as that of the diffracted beam returned to the laser diode, a temperature regulator that maintains the laser diode at a predetermined temperature, and a control unit that controls the mechanism so that the output beam having a predetermined wavelength is output and controls the temperature regulator so that the laser diode oscillates at the predetermined wavelength.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: August 25, 2009
    Assignee: Sony Corporation
    Inventors: Tomiji Tanaka, Kageyasu Sako, Ryo Kasegawa, Shinji Yamada, Katsuhiro Agatsuma
  • LASER SYSTEM
    Publication number: 20080180659
    Abstract: A laser system includes a laser diode that oscillates in a multi-mode and has characteristics in which its oscillation wavelength varies with temperature, a grating that receives a light beam emitted from the laser diode and returns a diffracted beam to the laser diode, a mechanism that changes the wavelength of the diffracted beam returned to the laser diode, a wavelength detector that detects the wavelength of an output beam which is the same as that of the diffracted beam returned to the laser diode, a temperature regulator that maintains the laser diode at a predetermined temperature, and a control unit that controls the mechanism so that the output beam having a predetermined wavelength is output and controls the temperature regulator so that the laser diode oscillates at the predetermined wavelength.
    Type: Application
    Filed: May 1, 2007
    Publication date: July 31, 2008
    Applicant: Sony Corporation
    Inventors: Tomiji Tanaka, Kageyasu Sako, Ryo Kasegawa, Shinji Yamada, Katsuhiro Agatsuma