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. 01, 2020
Filed:
Dec. 04, 2019
Kyocera Document Solutions Inc., Osaka, JP;
Jun Nakai, Osaka, JP;
KYOCERA DOCUMENT SOLUTIONS INC., Osaka, JP;
Abstract
An optical scanning device has an optical housing. A coupled Helmholtz resonator having a first resonance space and a second resonance space therein is disposed in the optical housing. A translucent partition wall, a first partition wall, and a second partition wall which extend from a bottom wall to a top wall of the optical housing are arranged in this order from an upstream side toward a downstream side on an optical path between a light source and a rotary polygonal mirror. The first and second resonance spaces are separated from each other by the three partition walls. One of the first and second resonance spaces resonates at a frequency of a rotational speed of a motor, and the other of the first and second resonance spaces resonates at a generated frequency of a wind noise generated by the rotary polygonal mirror.