Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1987 · 10 citations · 0 references
EngineeringManufacturing EngineeringDigital ImagingMachine VisionMetrologyIndustrial MetrologyInterferometryOptical MetrologySurface MetrologySurface RoughnessSurface TopographyOptical Surface ProfilometryOptical Surface Roughness MeasurementRoughnessRoughness MeasurementSpeckle MetrologySurface Roughness AnalysisSurface Roughness Measurement
An optical roughness measuring instrument has been developed for applications in the field of mechanical engineering. It is based upon the angular-speckle-correlation (ASC) method. Two-dimensional processing of the digitized speckle patterns is performed by means of a fast correlation algorithm. Alignment errors, which inevitably occur in practice and may impair the measurement, can be compensated by evaluating the position of the maximum value of the 2D-cross-correlation function of the speckle patterns. Experiments have been carried out using differently machined rough surface samples.