Machine vision methods and apparatus for machine vision illumination of an object
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United States of America Patent
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Sep 14, 1999
Grant Date -
N/A
app pub date -
Jan 6, 1997
filing date -
Jan 6, 1997
priority date (Note) -
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Abstract
The invention provides methods and apparatus for machine vision illumination by moving a non-diffuse light beam over selected points on the object so that each is illuminated at substantially the same angle by multiple rays during acquisition of an image frame. An apparatus for illuminating an object to facilitate its being imaged by an image acquisition device, e.g., a camera, includes a radiation source that generates and transmits to a region of the a non-diffuse beam of imaging radiation having a non-point cross-section. A dithering element moves the beam so that at least a region of the object is illuminated at substantially the same angle by multiple rays during an image acquisition period.
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