Distortion inspection apparatus of a glass plate
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United States of America Patent
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-
Mar 3, 1987
Grant Date -
N/A
app pub date -
Nov 26, 1984
filing date -
Dec 1, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a distortion inspection apparatus of a glass plate, a light and dark contrast pattern is sensed by an image sensor through a glass plate. The number of bits corresponding to a light or dark portion is detected from bipolar image data which are divided into a plurality of bits along each of parallel scanning lines assumed upon a surface of the glass plate. Then, a distortion state of the surface of the glass plate is discriminated in accordance with the differences among the thus detected number of bits and a reference value thereof. In such an arrangement, quantitative distortion discrimination can be performed.
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