METHOD AND APPARATUS FOR MEASURING TRANSMITTED OPTICAL DISTORTION IN GLASS SHEETS
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United States of America Patent
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Issued Date -
Apr 26, 2012
app pub date -
Oct 20, 2010
filing date -
Oct 20, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An apparatus and associated method for measuring both transmitted optical distortion and other minimal visible defects in the surface of a glass sheet. The disclosed apparatus includes a glass stand which receives a glass sheet for mounting between a background screen which includes a pre-defined contrasting pattern, and a digital camera which captures an image of the pattern transmitted through the glass sheet. The digital image is downloaded to a computer that is suitably programmed to analyze the image data to determine (1) optical distortion indicia, including the magnification and lens power, in the observed image of the pattern transmitted through the glass sheet, and (2) small visible optical or obstructive defects on the glass sheet.
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