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. 14, 2008
Filed:
Jan. 11, 2006
Soo-han Park, Yongin-si, KR;
Jang-hoon Yoo, Seoul, KR;
Hag-hyeon Jang, Seongnam-si, KR;
Ho-sik You, Suwon-si, KR;
Soo-Han Park, Yongin-si, KR;
Jang-Hoon Yoo, Seoul, KR;
Hag-Hyeon Jang, Seongnam-si, KR;
Ho-Sik You, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Samsung Electro-Mechanics Co. Ltd., Suwon-si, KR;
Abstract
An optical pickup apparatus includes a first objective lens having a low numerical aperture (NA) suitable for a low density recording medium, a second objective lens having a high NA suitable for a high density recording medium, a first light source that emits short wavelength light which is focused onto an optical recording medium by the first and second objective lenses, a first photodetector that receives a returning reflected light from the optical recording medium, and a first optical path converter for selectively guiding part of the light emitted from the first light source towards the first or the second objective lens, and guiding the reflected light towards the first photodetector.