Patents by Inventor Sung W. Noh

Sung W. Noh 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 system for reading or writing information on disk using hologram device and wollaston prism
    Patent number: 5568457
    Abstract: An optical pickup system simply formed to improve readout speed and reduce manufacturing cost having a semiconductor laser light source, a polarizing beam splitter (PBS), a collimator lens for changing the laser beam into parallel beams, a reflection mirror, an objective lens, a photodetector divided-by-six for detecting tracking and focus errors, a hologram device, a bisectional photodetector, a Wollaston prism for separating a beam into P-wave and S-wave components from a mixed beam of P-wave and S-wave components from the PBS, and a focusing lens for focusing the P-wave and S-wave component beams separated by the Wollaston prism onto two sections of the bisectional photodetector.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: October 22, 1996
    Assignee: LG Electronics Inc.
    Inventors: Keun Y. Yang, Sung W. Noh
  • Method and apparatus for making hologram
    Patent number: 5291321
    Abstract: A method and an apparatus for making a hologram wherein interference patterns to be recorded on a hologram plate are prevented from travelling, thereby enabling a high quality hologram to be made.
    Type: Grant
    Filed: November 5, 1992
    Date of Patent: March 1, 1994
    Assignee: Goldstar Co., Ltd.
    Inventor: Sung W. Noh