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. 13, 2012
Filed:
Sep. 14, 2011
Chiaki Asakawa, Gunma, JP;
Mitsuhiro Hiruma, Kiryu, JP;
Chiaki Asakawa, Gunma, JP;
Mitsuhiro Hiruma, Kiryu, JP;
SANYO Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
In an optical pickup apparatus, a major part of an optical path of a laser beam emitted from a first semiconductor laser device and an optical path of a laser beam emitted from a second semiconductor laser deviceare shared. The first laser beam is transmitted through a quarter wavelength plate and a second reflecting mirror and is reflected by a first reflecting mirror. With this structure, the number of parts of optical systems disposed in the optical pickup apparatus is reduced, an attachment operation of the parts becomes easier, and a time required for adjusting an optical axis is reduced. Thus, an operational efficiency is greatly improved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile