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:
Apr. 19, 2011
Filed:
Jul. 05, 2005
Katsumi Fujiwara, Hachioji, JP;
Tatsuji Kurogama, Hachioji, JP;
Katsuya Yagi, Hino, JP;
Hideyuki Fujii, Yoshikawa, JP;
Katsumi Fujiwara, Hachioji, JP;
Tatsuji Kurogama, Hachioji, JP;
Katsuya Yagi, Hino, JP;
Hideyuki Fujii, Yoshikawa, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
An optical pickup apparatus for recording and/or reproducing information onto/or from information recording surface, the optical pickup apparatus comprises a laser light source, an objective lens for converging light beams from the laser light source onto the information recording surface through a protective layer of an optical information recording medium, an optical device for changing a divergence angle of incident light beams by moving in an optical axis direction, the optical device being arranged between the laser light source and the objective lens, a light receiving device for receiving light beams reflected by the information recording surface and passed through the objective lens, and a driving device capable of moving the optical device in a direction crossing the optical axis.