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:
Feb. 08, 2011
Filed:
Oct. 31, 2007
Toshimasa Kamisada, Yokohama, JP;
Yasuo Kitada, Odawara, JP;
Kazuyoshi Yamazaki, Kawasaki, JP;
Tomoto Kawamura, Tokyo, JP;
Yoshiro Konishi, Yokohama, JP;
Toshimasa Kamisada, Yokohama, JP;
Yasuo Kitada, Odawara, JP;
Kazuyoshi Yamazaki, Kawasaki, JP;
Tomoto Kawamura, Tokyo, JP;
Yoshiro Konishi, Yokohama, JP;
Hitachi Media Electronics Co., Ltd., Iwate, JP;
Abstract
An optical pickup apparatus includes a semiconductor laser for emitting a laser light, an objective lens for irradiating the light flux emitted from the semiconductor laser onto an optical disc, and a light detector for receiving the light flux reflected from the optical disc. The light detector has a light receiving part that comprises a region, a region, a region, a region, a region, a regionand a region