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:
May. 16, 1995
Filed:
Aug. 07, 1992
Applicant:
Inventors:
Yasumasa Shibata, Hirakata, JP;
Kenichiro Urairi, Yawata, JP;
Takao Hayashi, Katano, JP;
Kazuhiko Fujikawa, Takatsuki, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G11B / ;
U.S. Cl.
CPC ...
359823 ; 359813 ; 369 4415 ;
Abstract
In an objective holder actuator assembly comprising an objective, an objective holder, a bearing, a focusing control coil, a tracking control coil and a balancer, an acrylate resin member is disposed between an objective holder and focusing and tracking control coils and the objective holder is made of ceramic material to reduce the resonance peak values of the movable segment of the objective actuator at high-order resonance frequencies and increase the high-order resonance frequencies.