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:
Jul. 24, 2001
Filed:
May. 27, 1998
Akihiro Tanaka, Kanagawa, JP;
Masataka Nishiyama, Saitama, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical deflection device is used to deflect a light beam, such as a laser beam, and comprises a base member, a movable member having an optical deflection element, and a set of spring elements provided at respective sides of the movable member such that the movable member is resiliently supported by the spring elements with respect to the base member. An electromagnetic driver rotationally drives the movable member with respect to the base member, and includes first and second sets of permanent magnets provided on the base member to produce first and second magnetic fields. The fields are reversed with respect to each other. The driver further includes first and second electromagnetic coils provided on the movable member and disposed in the fields. The respective first and second coils are electrically energized in the first and second fields in such a manner that electric currents flow through the first and second coils in opposite directions, whereby the respective first and second coils are subjected to rotational forces in the same rotational direction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile