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:
Jul. 04, 2006
Filed:
Aug. 13, 2002
Dae-sik Kim, Gyeonggi-do, KR;
Soon-kyo Hong, Seoul, KR;
Chul-woo Lee, Gyeonggi-do, KR;
Ho-cheol Lee, Gyeonggi-do, KR;
Kun-ho Cho, Gyeonggi-do, KR;
Jang-hoon Yoo, Seoul, KR;
Dae-sik Kim, Gyeonggi-do, KR;
Soon-kyo Hong, Seoul, KR;
Chul-woo Lee, Gyeonggi-do, KR;
Ho-cheol Lee, Gyeonggi-do, KR;
Kun-ho Cho, Gyeonggi-do, KR;
Jang-hoon Yoo, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
An optical pickup device includes a light unit for irradiating a light beam having a wavelength longer than 650 nm onto a recording medium and receiving and detecting a light beam reflected by the recording medium, and an objective tens formed of a single lens having an NA of 0.7 or more to form a light spot on the recording medium by condensing an incident light beam emitted from the light unit. A recording medium has a recording density of a DVD family or more and is formed of a material suitable for a long wavelength of 700 nm or more so that a reproduction signal by a reflectance of a recording surface is optimized. Thus, a compact high density optical recording/reproducing apparatus which is inexpensive and has high performance can be realized.