METHOD AND DEVICE FOR DETECTING DEFECTS OF GLASS SHEET

摘要

A device (40) for detecting chips at the edge on the first main surface (41a) side of a glass sheet (41) having an obscured-glass-like end surface (41c) and at the edge on the second main surface (41b) side thereof. A first camera (42) for observing the edge on the first main surface (41a) side and a second camera (43) for observing the edge on the second main surface (41b) side are inclined to the normals (53, 54) to the glass sheet. When a chip exists on the first main surface side, a first light source (44) light is refracted by the chip, and the refracted light is captured by the first camera. When a chip exists on the second main surface side, a second light source (45) light is refracted by the chip, and the refracted light is captured by the second camera.