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:
Nov. 22, 2005
Filed:
Mar. 16, 2005
Masahiro Yamada, Kanagawa, JP;
Tetsu Watanabe, Tokyo, JP;
Masahiro Yamada, Kanagawa, JP;
Tetsu Watanabe, Tokyo, JP;
Sony Corporation, , JP;
Abstract
An optical pickup using an optical fiber module which includes optical fibers is provided, which can be small-sized and utilize a light beam from a light source at high efficiency. The optical pickup includes: an optical fiber module, in which an optical fiberconsists of: a first optical fiberwhich is a field-distribution converting fiber and a second optical fiberwhose core has birefringence, both the optical fibersandare connected to each other at one end thereof, and the laser light beam L emitted from the semiconductor laseris made to enter the other end of the first optical fiber; an optical head having at least an objective lens; an optical detector; wherein the optical fiberis used as optical wiring to lead the laser light beam L emitted from the semiconductor laserinto the optical head.