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:
Mar. 18, 2008
Filed:
Apr. 22, 2005
Soo Han Park, Yongin-Si, KR;
Seong Su Park, Suwon-Si, KR;
Jung Woo Hong, Suwon-Si, KR;
Bong Gi Kim, Suwon-Si, KR;
Soo Han Park, Yongin-Si, KR;
Seong Su Park, Suwon-Si, KR;
Jung Woo Hong, Suwon-Si, KR;
Bong Gi Kim, Suwon-Si, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
A compatible optical pick-up apparatus, which records to and/or reproduce from both digital versatile disc (DVD)-type optical disks and compact disc (CD)-type optical disks for improving a signal regeneration capacity and a tracking capacity in operation at a high temperature. A polarized hologram of the optical pick-up apparatus is divided into six diffraction regions. The rays of a first light diffracted at the first and second diffraction regions are separately received by divided parts of a first bisected light-receiving portion of a photodetector.