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. 10, 2009
Filed:
Aug. 23, 2006
Makoto Horiyama, Nara, JP;
Masaru Ogawa, Ikoma, JP;
Makoto Horiyama, Nara, JP;
Masaru Ogawa, Ikoma, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In an integrated optical unit of the present invention, a photo detector () and a holding member () that sustains a semiconductor laser () are provided on a polarizing beam splitter (). This makes it possible to reduce a deviation from a designed value due to tolerance, and adjust a relative positional relationship between the semiconductor laser () and the photo detector (). Therefore, returned light from an optical disk () is accurately adjusted with respect to a division line of a photo-detecting device (). As a result, stable servo-control is realized, and an information signal with fine quality is obtained.