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:
Sep. 13, 2005
Filed:
Jun. 02, 2003
Mitsuhiro Ohno, Saitama, JP;
Masanobu Yamamoto, Nara, JP;
Mitsuhiro Ohno, Saitama, JP;
Masanobu Yamamoto, Nara, JP;
Fujinon Corporation, Omiya, JP;
Abstract
Provided is an optical scanner capable of preventing a temperature rise in a polygon mirror and its surrounding, and contributing to the prevention of degradation in image quality. Two cells (an inlet and an outlet) among a plurality of cells of a strengthening rib structure disposed in an optical base are connected through a passageway so as to form a flow path of outside air (air), and a bottom surface of a drive board forming part of an outer wall of a containing chamber and supporting a polygon mirror is exposed to the flow path (passageway). Even if a motor and a motor circuit disposed in the drive board generates heat during rotation of the polygon mirror, the drive board is directly cooled by the air flowing through the flow path, so a temperature rise in the polygon mirror and its surroundings can be prevented. Thereby, degradation in scanning characteristics of a laser beam due to deformation of an enclosure resulting from a temperature difference during heat generation can be prevented.