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. 01, 2011
Filed:
Jun. 14, 2007
Jang Hoon Yoo, Seoul, KR;
Ichiro Morishita, Yokohamasi, JP;
Soo Han Park, Yongin, KR;
DO Hoon Nam, Suwon-si, KR;
Ho Jin Yoon, Yongin-si, KR;
Myoung Seok Kim, Seoul, KR;
Jang Hoon Yoo, Seoul, KR;
Ichiro Morishita, Yokohamasi, JP;
Soo Han Park, Yongin, KR;
Do Hoon Nam, Suwon-si, KR;
Ho Jin Yoon, Yongin-si, KR;
Myoung Seok Kim, Seoul, KR;
Samsung Electronics 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 to generate a short-wavelength optical signal to use the first and second objective lenses, a first photo-detector to receive an optical signal, which is generated from the first light source, is focused on a recording medium by the first and second objective lenses, and is then reflected from the recording medium, and a beam splitter to perform a division of the optical signal generated from the first light source, to direct some parts of the divided optical signal to the first objective lens, and to direct the other parts of the divided optical signal to the second objective lens.