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:
Mar. 14, 2006
Filed:
Dec. 20, 2001
Kazuo Hirose, Mie, JP;
Takumi Hayashi, Mie, JP;
Kiyoshi Ishii, Tokyo, JP;
NTN Corporation, Osaka, JP;
Abstract
An optical pick-up allows a lens to be supported at high dimensional accuracy for a high-density recording medium, and suppresses resonance for a high-speed access. The optical pick-up includes a supporting shaft, and a lens holder which fits on a supporting shaft rotatably, wherein the supporting shaft is formed of ceramics containing zirconia, and wherein the lens holder is formed of a liquid crystal resin composition. The optical-pickup includes a lens holder having a shaft hole which fits on a rotating shaft and a plurality of object lens holes, wherein the lens holder is a molded product of a resin composition of a liquid crystal resin or a polyphenylene ether resin mixed with a fibrous filler. The molded product has flexural elastic modulus of 10 GPa or more. The lens holder includes a bearing part formed vertically to a lens receiving surface with an excellent inner diameter roundness and excellent mechanical strength.