Patent ID: 7826048
Filing Date: 2010-11-02
Classification: G03G

Abstract:
1. An apparatus for measuring geometric deviations in a doctor blade, comprising: a camera defining an optical axis, said optical axis defining an X-axis in a Cartesian coordinate system, wherein a Y-axis is oriented vertically and a Z-axis is oriented orthogonal to both said X-axis and said Y-axis, and wherein an origin of said Cartesian coordinate system defines an intersection point, with said camera being separated by a distance from said intersection point along said X-axis; a first light source that generates a first light beam having a first central axis, said first light source being positioned to direct said first light beam toward said intersection point with said first light source being separated by a distance from said intersection point along said first central axis, said first central axis being angularly disposed from said X-axis by a first angle with respect to said X-axis; a second light source that generates a second light beam having a second central axis, said second light source being positioned to direct said second light beam toward said intersection point with said second light source being separated by a distance from said intersection point along said second central axis, said second central axis being angularly disposed from said X-axis by a second angle with respect to said X-axis; and a doctor blade holding device to mount a doctor blade such that a longitudinal extent of said doctor blade is parallel to said Z-axis, and wherein a portion of said doctor blade is positioned at said intersection point during a measurement of said doctor blade.