Process for determining the optical quality of flat glass or flat glass products
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United States of America Patent
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May 14, 1991
Grant Date -
N/A
app pub date -
May 10, 1989
filing date -
May 13, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For determining the optical quality of float glass, at an appropriate point on the production line a silhouette is produced on the projection screen of the float glass ribbon. The silhouette is detected by a video camera and evaluated by digital image processing. The luminance profile of the silhouette is determined from the video picture. The refractive power profile is calculated from the luminance profile and is digitally and/or graphically represented and evaluated.
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