METHOD AND DEVICE FOR EVALUATING SURFACE CHARACTERISTICS BASED ON THE ANGLE-RESOLVED STRAY LIGHT MEASURING METHOD WITH AUTOMATIC DETERMINATION OF THE POSITION OF THE WORKPIECE

摘要

A method and apparatus for non-contact evaluation of the texture of a surface of the angle-resolved scattered light measurement comprises an optical sensor (10). From the measured reflected scattered light distribution, a characteristic value history is compared with a measured in a calibration process, pattern-course is determined during one revolution of the workpiece (30). If there is no match of characteristic value course and pattern-course, an error signal is generated.