| 摘要 |
A device for detecting surface defects ( 2 ) on the neck ring ( 3 ) of a container comprises: a light source ( 5 ) illuminating, by means of an incident light beam, a section of the surface of the neck ring of the container, along a determined incident direction (D<SUB>i</SUB>), at least one linear sensor ( 10 ) measuring light beams, arranged to receive the light beam reflected by the surface defect, the angle (alpha) between the incident (D<SUB>i</SUB>) and reflection (D<SUB>r</SUB>) directions lying between 15 and 45°, preferably in the order of 30°, one of the directions being parallel to the axis of revolution of the container, means ( 15 ) for ensuring the rotation of the container about the axis of revolution through at least one rotation, and a unit ( 16 ) for analysing and processing light beams received by the linear sensor, to identify the presence of a surface defect.
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