Facsimile and static presentation processing – Facsimile – Picture signal generator
Reexamination Certificate
2006-02-07
2006-02-07
Williams, Kimberly (Department: 2626)
Facsimile and static presentation processing
Facsimile
Picture signal generator
C358S497000, C358S496000, C358S509000, C358S495000
Reexamination Certificate
active
06995878
ABSTRACT:
The object of this invention is to read an image (scan flow), when an original is being moved, above a scan flow glass member, so as to prevent degradation in image caused by dust or a scar on a scan flow glass. In order to achieve this object, the original which is being moved is illuminated by an illumination system comprised of an illumination light source and reflecting member and different from an illumination system in a reading apparatus body and comprised of an illumination light source and reflecting member. After a reflected light beam passes through a slit and the scan flow glass member, it forms an image on a line sensor, e.g., a CCD, by an imaging lens through a movable mirror. As the original moves at a constant speed, it is read by the line sensor, e.g., a CCD, at a predetermined timing, thereby obtaining image information of the original. The original is located above the scan flow glass member. Even if dust or a scar of about several tens μm is present on the scan flow glass member, it goes out of focus, so it can be prevented from forming an absent point of the line sensor such as a CCD.
REFERENCES:
patent: 5734483 (1998-03-01), Itoh
patent: 5734758 (1998-03-01), Yamamoto et al.
patent: 5912747 (1999-06-01), Murakami
patent: 6646768 (2003-11-01), Andersen et al.
patent: 6891547 (2005-05-01), Kang et al.
Canon Kabushiki Kaisha
Morgan & Finnegan , LLP
Williams Kimberly
Worku Negussie
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