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. 23, 2013
Filed:
Jul. 23, 2004
Ui-yol Kim, Suwon-Si, KR;
Tae-kyung Kim, Seoul, KR;
Chong-sam Chung, Hwaseong-si, KR;
Pyong-yong Seong, Seoul, KR;
Ui-yol Kim, Suwon-Si, KR;
Tae-kyung Kim, Seoul, KR;
Chong-sam Chung, Hwaseong-si, KR;
Pyong-yong Seong, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
A compatible optical pickup including an optical unit and a focusing unit. The optical unit emits a short wavelength light for high-density recording media and a long wavelength light for low-density recording media, directs the short and long wavelength light to a recording medium, receives lights reflected by the recording medium, and detects an information reproduction signal and/or an error signal from the received lights. The focusing unit focuses light received from the optical unit to form a light spot on a recording surface of the recording medium, diffracts the short wavelength light into a zero order light and the long wavelength light into a second order light to be used as effective light for recording and/or reproduction. Thus, a high-density recording medium and a low-density recording medium having different thicknesses can be compatibly used.