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. 22, 2008
Filed:
Jan. 29, 2004
Ji-hwan Lim, Suwon-si, KR;
Ju-hyung Lee, Suwon-si, KR;
Pyong-yong Seong, Seoul, KR;
Eun-goo Kim, Suwon-si, KR;
Chun-gi Kim, Suwon-si, KR;
Kyoung-hwan Park, Suwon-si, KR;
Ji-hwan Lim, Suwon-si, KR;
Ju-hyung Lee, Suwon-si, KR;
Pyong-yong Seong, Seoul, KR;
Eun-goo Kim, Suwon-si, KR;
Chun-gi Kim, Suwon-si, KR;
Kyoung-hwan Park, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
A compatible optical pickup, including first and second light sources for emitting lights with different wavelengths and first and second photodetectors for detecting an information signal and/or an error signal, and a method of detecting the amount of output light using the compatible optical pickup. The first and second photodetectors monitor the amount of light output from the second and first light sources respectively such that no extra front photodetectors are required. Thus, the number of optical component parts included in the optical pickup can be reduced, thereby lowering the manufacturing costs for the optical pickup. Also, there is no need to secure a space in a base where a front photodetector is to be installed, so the base is simplified. Thus, inferior moldings are reduced, and the durability of a mold can be prolonged.