Optical method for inspecting transparent or translucent articles intended to allocate a reference optical adjustment to the vision system
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United States of America Patent
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Dec 13, 2016
Grant Date -
Dec 11, 2014
app pub date -
Jan 25, 2013
filing date -
Jan 27, 2012
priority date (Note) -
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Abstract
A method of inspecting articles of transparent/translucent material with a vision system comprises illuminating the articles with a light source having an angular spectrum that is adapted to the contrast selected for refractive items presented by the articles. An image sensor picks up the light that has passed through the articles to make images of the articles. During a stage of referencing the vision system, a reference standard is in the field of view of the image sensor, the standard including at least one standard item that refracts light in a known range of angles. An image of the standard is taken to measure at least the contrast in the image produced by at least one standard item. During at least one stage of qualifying the vision system, the standard is placed once more in front of the light source and in the field of view of the image sensor.
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