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. 03, 2006
Filed:
Jul. 06, 2001
Jang-hoon Yoo, Seoul, KR;
Seung-tae Jung, Gyeonggi-do, KR;
Ho-cheol Lee, Gyeonggi-do, KR;
Ju-hyung Lee, Gyeonggi-do, KR;
Chul-woo Lee, Gyeonggi-do, KR;
Young-il Kim, Gyeonggi-do, KR;
Hyun-seob Choi, Gyeonggi-do, KR;
Sang-beom Hong, Gyeonggi-do, KR;
Jang-hoon Yoo, Seoul, KR;
Seung-tae Jung, Gyeonggi-do, KR;
Ho-cheol Lee, Gyeonggi-do, KR;
Ju-hyung Lee, Gyeonggi-do, KR;
Chul-woo Lee, Gyeonggi-do, KR;
Young-il Kim, Gyeonggi-do, KR;
Hyun-seob Choi, Gyeonggi-do, KR;
Sang-beom Hong, Gyeonggi-do, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A compatible optical pickup device includes a single light source to emit a light having a wavelength longer than 650 nm, an objective lens having a near axis area, a ring type annular lens area, and a far axis area to focus the light to form light spots suitable for a first relatively thin optical disk and a second relatively thick optical disk to form a first light spot having an FWHM (full width at half maximum) of 0.72 μm or less for the first optical disk and a second light spot having an FWHM of 0.8 μm or more for the second optical disk, an optical path changer to change a proceeding path of incident light, and a photodetector to receive light reflected by the optical disk and having passed through the objective lens and the optical path changer and to detect an information signal and/or an error signal.