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:
Jan. 05, 1988
Filed:
Nov. 19, 1986
Applicant:
Inventors:
Takao Ishida, Kawasaki, JP;
Kenichi Tsuneeda, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350-68 ;
Abstract
In an optical deflector of a polygonal mirror type, a cylinder rotatably overlaps on a fixed shaft with a gap between them. The cylinder rotates the polygonal mirror therewith. The cylinder is radially supported by a journal bearing of dynamic pressure type and axially suspended by a magnetic thrust bearing. The cylinder and the fixed shaft are made of nonmagnetic material, so that the cylinder is prevented from eccentric rotation because of local magnetization of cylinder and the shaft.