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:
Jan. 10, 2006
Filed:
Jun. 11, 2003
Jang Hoon Yoo, Seoul, KR;
Chul Woo Lee, Seoul, KR;
Chong Sam Chung, Sungnam, KR;
Pyong Yong Seong, Seoul, KR;
Kun Ho Cho, Suwon, KR;
Hyun Seob Choi, Suwon, KR;
Yong Hoon Lee, Suwon, KR;
Tae Kyung Kim, Suwon, KR;
NO Kyong Park, Suwon, KR;
Jang Hoon Yoo, Seoul, KR;
Chul Woo Lee, Seoul, KR;
Chong Sam Chung, Sungnam, KR;
Pyong Yong Seong, Seoul, KR;
Kun Ho Cho, Suwon, KR;
Hyun Seob Choi, Suwon, KR;
Yong Hoon Lee, Suwon, KR;
Tae Kyung Kim, Suwon, KR;
No Kyong Park, Suwon, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
An optical pickup apparatus having laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an objective lens having a focal length of an information recording surface in the DVD, an optical path control unit controls the light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit, and a phase shift unit between the optical path control unit and the objective lens and which shifts a phase of the second light to reduce the size of a beam spot which is formed the information recording surface in the CD-R.