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:
Sep. 29, 2015
Filed:
Feb. 25, 2014
Toshiba Samsung Storage Technology Korea Corporation, Suwon-si, KR;
Ki-bok Kim, Suwon-si, KR;
Ji-sun Ahn, Seoul, KR;
Ju-hee Im, Suwon-si, KR;
Jin-ho Jeong, Seoul, KR;
Seung-man Han, Suwon-si, KR;
Toshiba Samsung Storage Technology Korea Corporation, Suwon-si, KR;
Abstract
Provided are an optical pickup and an optical information storage system including the same. The optical pickup includes a diffracting element that splits incident light into main light and a plurality of sub light. The diffracting element has at least three regions including first through third regions. A second region is disposed between a first region and a third region and has a phase difference from the first and third regions. The optical pickup detects a tracking error signal by using light diffracted by the diffracting element.