Scanning optical system

Details Scanning optical system Scanning optical system

2005-03-29

2005-03-29

Dang, Hung Xuan (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

C359S216100, C359S217200, C347S258000, C347S261000

Reexamination Certificate

active

06873466

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.

REFERENCES:
patent: 5181137 (1993-01-01), Koide
patent: 5784094 (1998-07-01), Ota et al.
patent: 6501586 (2002-12-01), Takayama
patent: 6-160743 (1994-06-01), None
patent: 10-133131 (1998-05-01), None
patent: 2001-33721 (2001-02-01), None
patent: 2003-5113 (2003-01-01), None

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