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.:

US 7697398 B1

PDF
Full Text
Expired
Date of Patent:
Apr. 13, 2010

Filed:

Jan. 24, 2007
Applicant:

Katsumi Fujiwara, Hachioji, JP;

Inventor:

Katsumi Fujiwara, Hachioji, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A piezoelectric element of a driving device is arranged on the opposite side of the light source, when an optical pickup device is divided by a plane that includes an optical axis of an objective lens and perpendicularly intersects the axis line of a light flux entering a raising mirror, that has come from the light source, whereby, it is possible to cause optical elements existing between the objective lens and the laser light source to be away from the piezoelectric element, and thereby to avoid an influence of heat even when a gap between members is reduced.


Find Patent Forward Citations

Fujiwara, Katsumi. (2010). Optical pickup device having an electromechanical conversion element for recording and/ or reproducing information (U.S. Patent No. 7697398). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7697398

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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