Patents by Inventor Toshiki Matsuno

Toshiki Matsuno 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).

  • Optical pickup which includes a single objective lens having magnification equal to or greater than 3 and equal to or smaller than 5
    Patent number: 4868821
    Abstract: The movable range of an objective of an optical pickup device used in optical disc reproducing apparatus is increased and the size of the device is reduced by moving the objective solely or in combination with a collimating lens system in that range. The objective and collimating lens systems are integrated into a lens holder and located in the path of a diverging beam of a semiconductor laser.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: September 19, 1989
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masashi Ito, Toshiki Matsuno, Hiroyuki Nakamura, Hiroshi Yasuda
  • Objective lens driving apparatus for optical disc player
    Patent number: 4646283
    Abstract: Disclosed is an objective lens driving apparatus having a holder 9 holding an objective lens 1 and connected to a base 17 through at least four linear members 13, such that the holder 9 can be moved both in the focussing direction and in the tracking direction orthogonal to the focussing direction through the flexing of the linear members 13. Undesirable local resonance can be suppressed due to the use of the linear members 13 in support of the holder 9.
    Type: Grant
    Filed: January 29, 1985
    Date of Patent: February 24, 1987
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masashi Ito, Hiroshi Yasuda, Hiroyuki Nakamura, Toshiki Matsuno