Method to determine the optical quality of a glazing
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United States of America Patent
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May 5, 2009
Grant Date -
Feb 15, 2007
app pub date -
Mar 15, 2004
filing date -
Mar 19, 2003
priority date (Note) -
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Abstract
A method of determining the optical quality of a glazing which includes at least one area having a reduced light transmission, involves producing a shadowgraph image of the glazing and measuring the illumination of the glazing at a plurality of measurement points arranged in an array extending over the glazing. The deviation in illumination from a desired value at each measurement point is determined and the at least one area of reduced light transmission is omitted from the array of measurement points.
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