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. 13, 2007
Filed:
Mar. 02, 2004
Yong-san Shin, Kyunggi-do, KR;
Chun-gi Kim, Kyunggi-do, KR;
Oh-byoung Kwon, Kyunggi-do, KR;
Woo-seok Choi, Kyunggi-do, KR;
Sung-wook Kim, Seoul, KR;
No-jun Kwak, Kyunggi-do, KR;
Eui-joong Kim, Kyunggi-do, KR;
Yong-San Shin, Kyunggi-do, KR;
Chun-Gi Kim, Kyunggi-do, KR;
Oh-Byoung Kwon, Kyunggi-do, KR;
Woo-Seok Choi, Kyunggi-do, KR;
Sung-Wook Kim, Seoul, KR;
No-Jun Kwak, Kyunggi-do, KR;
Eui-Joong Kim, Kyunggi-do, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon-si, KR;
Abstract
An optical pickup device including a dual wavelength light source module for emitting a selected one of two light beams having different wavelengths, a dual grating for splitting, into three beams, the selected light beam emitted from the dual wavelength light source, and a hologram for focusing the three beams of the selected light beam onto a photodetector having typical 8-section patterns such that the three beams of the selected light beam are focused onto the same spots as those of the other light beam, respectively.