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:
Feb. 03, 2009
Filed:
Oct. 27, 2004
Junichi Ito, Fuchu, JP;
Hiroyuki Takizawa, Chofu, JP;
Masataka Ide, Hachioji, JP;
Sumio Kawai, Hachioji, JP;
Junichi Ito, Fuchu, JP;
Hiroyuki Takizawa, Chofu, JP;
Masataka Ide, Hachioji, JP;
Sumio Kawai, Hachioji, JP;
Olympus Corporation, Tokyo, JP;
Abstract
An optical apparatus having dust-off function comprises a dust-off filter located in the vicinity of an optical electronic device such as an image-pickup element, an image display element, or the like. An optical apparatus includes a mechanism that controls vibrating operation so that the frequency of vibration waves generated in the filter changes with the passage of time. An optical apparatus includes first vibrator for successive vibration with frequencies, a circuit monitoring the state of vibration of the optical element during vibrating operation of the first vibrator, thereby detecting the resonance frequency of the element, and second vibrator for vibration with the detected resonance frequency or a frequency approximate to it. An optical apparatus includes monitor for monitoring the state of vibration of the filter and a circuit for detecting abnormal states in accordance with output signals from the electrode.