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:
Oct. 10, 2006
Filed:
Oct. 30, 2000
Tae-kyung Kim, Suwon, KR;
Chong-sam Chung, Seongnam, KR;
Young-man Ahn, Suwon, KR;
Hea-jung Suh, Seongnam, KR;
Tae-kyung Kim, Suwon, KR;
Chong-sam Chung, Seongnam, KR;
Young-man Ahn, Suwon, KR;
Hea-jung Suh, Seongnam, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
An optical pickup capable of effectively reducing chromatic aberration that includes a collimating lens, which includes a diverging lens with diverging power and a focusing lens with focusing power, arranged on the optical path between a light source and an objective lens, wherein assuming that the total focal length of the collimating lens is f and the focal length of the diverging lens is fn, the collimating lens satisfies the relationship −1.5>f/fn. The optical pickup is compatible with both existing digital versatile disks (DVDs), and high-definition (HD)-DVDs, which will not yet standardized, need a blue light source near 405 nm and an objective lens having an numerical aperture of 0.6 or more.