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:
Dec. 25, 2012
Filed:
Aug. 17, 2009
Tatsuya Yamasaki, Hitachinaka, JP;
Yoshihiro Sato, Hitachinaka, JP;
Seiichi Kato, Tsuchiura, JP;
Katsuhiko Kimura, Kasumigaura, JP;
Takahiro Yamaguchi, Yokohama, JP;
Yoshiro Konishi, Mito, JP;
Hidenao Saito, Yokohama, JP;
Tatsuya Yamasaki, Hitachinaka, JP;
Yoshihiro Sato, Hitachinaka, JP;
Seiichi Kato, Tsuchiura, JP;
Katsuhiko Kimura, Kasumigaura, JP;
Takahiro Yamaguchi, Yokohama, JP;
Yoshiro Konishi, Mito, JP;
Hidenao Saito, Yokohama, JP;
Hitachi Media Electronics Co., Ltd., Iwate, JP;
Abstract
An optical pickup, mounting a lens actuatorthereon, the lens actuator comprises: a lenshaving an optical axis in direction in parallel with an optical disc; a holderwhich holds the lens thereon; a first guide shaftholding the holder, so as to regulate the holder to change a position thereof, into an inner surface direction of a surface having the optical axis of the lens as a normal line vector thereof; a second guide shaftwhich regulates the holder to change the position thereof, into a normal line vector of an optical disc; and a reed screw, which moves the holder into direction of the optical axis of the lens, wherein a distance between the optical axis of the lens and the optical disc, a distance between a central axis of the first guide shaft and the optical disc, and a distance between a central axis of the second guide shaft and the optical disc are lager than a distance between a central axis of the reed screw and the optical disc.