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:
Jun. 07, 2005
Filed:
Mar. 07, 2003
Koji Kaneko, Ageo, JP;
Tasuku Hosonuma, Saitama, JP;
Koji Kaneko, Ageo, JP;
Tasuku Hosonuma, Saitama, JP;
Fujinon Corporation, Saitama, JP;
Abstract
An optical scanning device is disclosed that includes a rotary polygon mirror and an air current rectifying mechanism. The air current rectifying mechanism is positioned with a surface that is substantially parallel to an end surface of the rotary polygon mirror. At least one specified condition is satisfied to insure that negative pressure regions are prevented from forming on planar surfaces of the rotary scanning mirror when the scanning mirror is rotated by a scanning motor. In this manner, dust that normally tends to be deposited on the scanner mirror planar surfaces by eddy currents that form as a result of these negative pressure regions is prevented from adhering to the rotary scanning mirror surfaces. Thus, optical performance of the scanning mirror is maintained over time.