Distortion inspection apparatus of a glass plate

Details Distortion inspection apparatus of a glass plate Distortion inspection apparatus of a glass plate

H - Electricity

04

N

354/25, 350/32

H04N 7/18 (2006.01) G01B 11/30 (2006.01) G01N 21/41 (2006.01) G01N 21/896 (2006.01)

Patent

CA 1227276

ABSTRACT OF THE DISCLOSURE 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.

469021

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