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. 08, 2009
Filed:
Jan. 26, 2007
Yoshihiro Satou, Yokohama, JP;
Katsuhiko Kimura, Kasumigaura, JP;
Hidenao Saito, Yokohama, JP;
Jun Hato, Yokohama, JP;
Yoshihiro Satou, Yokohama, JP;
Katsuhiko Kimura, Kasumigaura, JP;
Hidenao Saito, Yokohama, JP;
Jun Hato, Yokohama, JP;
Hitachi Media Electronics Co., Ltd., Iwate-ken, JP;
Abstract
An objective lens actuator that can accommodate higher density and speed is provided by improving frequency characteristics of an objective lens. The objective lens actuator includes an objective lens, a cylindrical lens holder that holds the objective lens, and a reinforcement part disposed in an opening opposite to the objective lens of the lens holder. The reinforcement part has a size that occupies one third to one half of the cylindrical wall of the lens holder from the end of an aperture along the optical axis. In this range, the high order resonance frequencies of the lens holder can be increased, and therefore, it is possible to obtain an objective lens actuator that can minimize the vibration amplitude at the high order resonance frequencies.