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:
Mar. 29, 2005
Filed:
Jun. 26, 2003
Yoshihiro Hama, Saitama-ken, JP;
Yutaka Takakubo, Saitama-ken, JP;
Yasushi Suzuki, Saitama-ken, JP;
Shimpei Shinozaki, Tokyo, JP;
Toshimitsu Saito, Saitama-ken, JP;
Yoshihiro Hama, Saitama-ken, JP;
Yutaka Takakubo, Saitama-ken, JP;
Yasushi Suzuki, Saitama-ken, JP;
Shimpei Shinozaki, Tokyo, JP;
Toshimitsu Saito, Saitama-ken, JP;
PENTAX Corporation, Tokyo, JP;
Abstract
A scanning optical system deflects a light beam by a reflection surface of a polygon mirror toward an object surface through an image forming optical system so that the light beam scans on the object surface to form an image thereon. A light shielding member is disposed between the polygon mirror and the image forming optical system. The shielding member is an opaque plate disposed perpendicular to the optical axis of the image forming optical system. The light shielding member prevents a ghost light that is reflected by another reflection surface of the polygon mirror located adjacent to the reflection surface deflecting the light beam from entering the image forming optical system and impinging onto the object surface.