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:
Dec. 13, 2011
Filed:
Mar. 06, 2007
Kosuke Fujimoto, Kawasaki, JP;
Kosuke Fujimoto, Kawasaki, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
A foreign substance removing apparatus that can provide the desired vibration amplitude to a light transmitting member, without using a large driving voltage. The foreign substance removing apparatus removes foreign substances adhered to a surface of an optical member disposed in a light ray incident path and includes a piezoelectric element fixed to a first plane of the optical member, a circular disk fixed to a second plane, opposite from the first plane, of the optical member so as to face the piezoelectric element, and a driving unit for applying an AC voltage to the piezoelectric element to cause the optical member to elastically vibrate in a direction perpendicular to the planes thereof, thereby removing the foreign substances adhered to the surface of the optical member.