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:
Jul. 30, 2002
Filed:
Oct. 07, 1999
Applicant:
Inventors:
Seong Yun Jeong, Seoul, KR;
Kyung Chan Park, Seoul, KR;
Assignee:
LG Electronics Inc., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 ;
U.S. Cl.
CPC ...
G11B 7/00 ;
Abstract
An optical pickup apparatus that is capable of eliminating a crosstalk component of a high-density optical disc effectively. In the apparatus, a first polarizing phase plate is arranged on a light path of a light-focusing system for irradiating a light beam onto the optical disc. A second polarizing phase plate is arranged on a light path of a light-receiving system for detecting a reflective light from the optical disc. The apparatus is capable of eliminating a crosstalk component optimally by detecting sub-beams separately using the first and second polarizing phase plates consisting of a plurality of phase zones.