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:
Nov. 13, 2001
Filed:
Jun. 23, 1999
Applicant:
Inventors:
Ryuji Izumino, Yamagata, JP;
Hiroaki Ito, Yamagata, JP;
Yoshiharu Sato, Yamagata, JP;
Yutaka Saito, Yamagata, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 7/02 ;
U.S. Cl.
CPC ...
G02B 7/02 ;
Abstract
An optical pickup device with a compact actuator has a holder that includes an objective lens and a hole formed therein. The holder is supported flexibly by a base. A focusing coil and a tracking coil are attached to at least a portion of the hole. A magnetic circuit that imparts magnetic flux to the focusing and the tracking coils is placed in the hole. The focusing and the tracking coils have magnetically fluxed and unfluxed portions. The magnetically unfluxed portions are positioned on the opposite side of the lens as that of the fluxed portions.