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:
Nov. 16, 2010
Filed:
May. 17, 2006
Takuma Yanagisawa, Tsurugashima, JP;
Yasuo Tanahashi, Tsurugashima, JP;
Takuma Yanagisawa, Tsurugashima, JP;
Yasuo Tanahashi, Tsurugashima, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
The present invention makes it possible to accurately and adequately adjust the position where sub beams are shone when performing tracking correction or CTC using three beams. The invention adjusts the positions where the sub beams are shone onto the surface of an optical disc DK by changing the angle of a diffraction gratingthat is mounted inside an optical pickup. When performing adjustment, the angle of the diffraction gratingis performed in three stages: (i) rough adjustment, (ii) initial fine adjustment and (iii) continuous fine adjustment.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile