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:
Jun. 03, 2014
Filed:
Dec. 14, 2010
Yoshihiro Sato, Yokohama, JP;
Hidenao Saito, Yokohama, JP;
Jun Hato, Fujisawa, JP;
Ryuichiro Mizuno, Fujisawa, JP;
Katsuhiko Kimura, Kasumigaura, JP;
Seiichi Kato, Tsuchiura, JP;
Yoshihiro Sato, Yokohama, JP;
Hidenao Saito, Yokohama, JP;
Jun Hato, Fujisawa, JP;
Ryuichiro Mizuno, Fujisawa, JP;
Katsuhiko Kimura, Kasumigaura, JP;
Seiichi Kato, Tsuchiura, JP;
Hitachi Media Electronics Co., Ltd., Iwate, JP;
Abstract
In an optical pickup equipped with a semiconductor laser, electro-optical components such as a lens, and an objective lens drive device, the objective lens drive device includes objective lenses, a holder holding the objective lenses, a focusing coil, and tracking coils. The focusing coil is wound in parallel to the optical surface of the objective lens, and formed in a parallelogram shape having inclined portions provided near the tracking coils. The two tracking coils are placed on diagonal portions of the lens holder.