Patents by Inventor Yoshimaru Nakane

Yoshimaru Nakane 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).

  • Use of a photoelectric converted signal to inspect an objective lens driving device
    Patent number: 8053712
    Abstract: An inspecting method for an object lens driving device including a base, an objective lens, a holder for holding the objective lens on the base, and a drive mechanism for driving the holder so as to move the objective lens in the focus direction, the method comprising the steps of: emitting a laser beam through the objective lens; allowing the laser beam emitted through the objective lens to pass through an aperture having a predetermined diameter; applying to the drive mechanism a drive voltage for moving the holder between a first position closest to a surface of the base and a second position farther than the first position from the surface of the base; performing photoelectric conversion of the laser beam having passed through the aperture; and inspecting the objective lens driving device based on a signal obtained by the photoelectric conversion.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: November 8, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Yasuhiro Muraoka, Masaharu Sakazume, Yoshimaru Nakane, Hiroshi Yoshida, Shinya Tsukada
  • INSPECTING METHOD FOR OBJECTIVE LENS DRIVING DEVICE AND INSPECTING APPARATUS FOR THE SAME
    Publication number: 20090206239
    Abstract: An inspecting method for an object lens driving device including a base, an objective lens, a holder for holding the objective lens on the base, and a drive mechanism for driving the holder so as to move the objective lens in the focus direction, the method comprising the steps of: emitting a laser beam through the objective lens; allowing the laser beam emitted through the objective lens to pass through an aperture having a predetermined diameter; applying to the drive mechanism a drive voltage for moving the holder between a first position closest to a surface of the base and a second position farther than the first position from the surface of the base; performing photoelectric conversion of the laser beam having passed through the aperture; and inspecting the objective lens driving device based on a signal obtained by the photoelectric conversion.
    Type: Application
    Filed: February 20, 2009
    Publication date: August 20, 2009
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Yasuhiro Muraoka, Masaharu Sakazume, Yoshimaru Nakane, Hiroshi Yoshida, Shinya Tsukada