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. 03, 2013
Filed:
Dec. 09, 2011
Seong-su Park, Hwaseong-si, KR;
Joji Anzai, Suwon-si, KR;
Yong-han Yoon, Suwon-si, KP;
Jong-uk Kim, Yongin-si, KR;
Ichiro Morishita, Yokohama, JP;
Seong-su Park, Hwaseong-si, KR;
Joji Anzai, Suwon-si, KR;
Yong-han Yoon, Suwon-si, KP;
Jong-uk Kim, Yongin-si, KR;
Ichiro Morishita, Yokohama, JP;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
An optical pick-up apparatus for reproducing information recorded on an optical recording medium or recording information on the optical recording medium is provided. The optical pick-up apparatus includes a light source unit which generates beams; a diffraction element which diffracts the generated beams; and an objective lens which focuses a p order diffracted beam which is used for recording and reproducing information among a plurality of diffracted beams which are diffracted by the diffraction element on any one of a plurality of information layers which are formed on an optical recording medium. A p±1 order diffracted beam which is not used for recording and reproducing information is focused away from the plurality of information recording layers and on the surface of the optical recording medium.