The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2009
Filed:
Nov. 10, 2005
Dong Woo Suh, Daejeon, KR;
Yong Woo Park, Daejeon, KR;
Mun Cheol Paek, Daejeon, KR;
Ho Jun Ryu, Seoul, KR;
Hee Sook Chung, Daejeon, KR;
Kwang Yong Kang, Daejeon, KR;
Dong Woo Suh, Daejeon, KR;
Yong Woo Park, Daejeon, KR;
Mun Cheol Paek, Daejeon, KR;
Ho Jun Ryu, Seoul, KR;
Hee Sook Chung, Daejeon, KR;
Kwang Yong Kang, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
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.