Patents Assigned to RHOM Co., Ltd
  • Optical pickup, manufacturing method thereof, and optical disk system
    Patent number: 7388823
    Abstract: An optical pickup for reading information written on an optical disk is equipped with a vertical multi-mode converted laser diode which emits light, means for focusing the emitted light from the laser diode onto the optical disk, and means for receiving reflected light from the optical disk in order to read the information written on the optical disk, wherein the coherent distance of the emitted light from the laser diode is made shorter than the optical path length of the optical pickup.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: June 17, 2008
    Assignee: RHOM Co., Ltd
    Inventor: Naotaro Nakata