Patents by Inventor Da-hye Chol

Da-hye Chol 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).

  • Patent number: 8018813
    Abstract: A holographic information recording and/or reproducing apparatus including: a light source unit emitting reference light and signal light; a first optical path guiding unit guiding the lights to cross; a second optical path guiding unit including a first polarization converter located on an optical path of one of the reference and signal lights, a first polarization beam splitter located at a crossing point of the reference light and the signal light, an optical path converter guiding the reference light and the signal light so that they cross again, a second polarization converter located on an optical path of the signal light before the signal light crosses the reference light, and a second polarization beam splitter uniting the optical paths of the reference light and the signal light; and an objective lens unit illuminating the reference light and the signal light onto one side of a holographic information storage medium.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: September 13, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-cheol Bae, Taek-seong Jeong, Tae-kyung Kim, Da-hye Chol
  • Publication number: 20090168629
    Abstract: A holographic information recording and/or reproducing apparatus including: a light source unit emitting reference light and signal light; a first optical path guiding unit guiding the lights to cross; a second optical path guiding unit including a first polarization converter located on an optical path of one of the reference and signal lights, a first polarization beam splitter located at a crossing point of the reference light and the signal light, an optical path converter guiding the reference light and the signal light so that they cross again, a second polarization converter located on an optical path of the signal light before the signal light crosses the reference light, and a second polarization beam splitter uniting the optical paths of the reference light and the signal light; and an objective lens unit illuminating the reference light and the signal light onto one side of a holographic information storage medium.
    Type: Application
    Filed: September 18, 2008
    Publication date: July 2, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jae-cheol BAE, Taek-seong Jeong, Tae-Kyung Kim, Da-hye Chol