Patents by Inventor Hee Sook Chung

Hee Sook Chung 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 head having a beam input/output coupler on a planar waveguide
    Patent number: 7580336
    Abstract: An optical head has a beam input/output coupler on a planar waveguide and other parts including: a light transmitting element emitting a beam; a planar waveguide formed on a substrate and receiving the beam oscillated from the light transmitting element; a beam input/output coupler integrated as a thin film on a portion of the planar waveguide and receiving the beam through the planar waveguide to transmit the beam vertically toward a disc positioned above the planar waveguide or transmitting the beam reflected from the disc through the planar waveguide; and light receiving elements receiving the beam propagated to the planar waveguide through the beam input/output coupler.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: August 25, 2009
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong Woo Suh, Yong Woo Park, Mun Cheol Paek, Ho Jun Ryu, Hee Sook Chung, Kwang Yong Kang