Patent ID: 6097482
Filing Date: 2000-08-01
Classification: G01N

Abstract:
An apparatus for the detection of surface flaws in a moving sample of material having a surface which is partially reflective, the apparatus comprising:means for moving a sample of material, the material having a surface which is at least partially reflective;at least one light source arranged to direct incident light on the surface of the material;a light detector disposed above the surface of the material;light baffles arranged relative to the at least one light source and the light detector to exclude light from the at least one light source from the light detector except in the presence of a flaw in the material, the light baffles being angularly adjustably mounted relative to a direction of movement of the material,wherein the light detector and the at least one light source are arranged relative to each other such that, in the absence of a surface flaw in the material, substantially no light from the at least one light source is detected by the light detector and, in the presence of a surface flaw in the material, light from the at least one light source is reflected off of the flaw and into the detector.