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. 20, 2006
Filed:
Oct. 12, 2000
Chul-woo Lee, Seoul, KR;
Dong-ho Shin, Seoul, KR;
Kyung-hwa Rim, Suwon, KR;
Chong-sam Chung, Sung Nam, KR;
Kun-ho Cho, Suwon, KR;
Pyong-yong Seong, Seoul, KR;
Jang-hoon Yoo, Seoul, KR;
Yong-hoon Lee, Suwon, KR;
Chul-woo Lee, Seoul, KR;
Dong-ho Shin, Seoul, KR;
Kyung-hwa Rim, Suwon, KR;
Chong-sam Chung, Sung Nam, KR;
Kun-ho Cho, Suwon, KR;
Pyong-yong Seong, Seoul, KR;
Jang-hoon Yoo, Seoul, KR;
Yong-hoon Lee, Suwon, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A lens device which can be used as an objective lens in an optical pickup apparatus includes an objective lens provided along a light path facing a disc and having a predetermined effective diameter, and light controlling means provided along the light path for controlling the light in an intermediate region between near and far axes of an incident light beam, thus providing a simplified and inexpensive device for using discs of differing thickness in a single disc drive, by reducing the spherical aberration effect.