Surface Roughness Measurement By 2-D Digital Correlation Of Speckle Images

Bernhard Ruffing; Johannes Anschutz

doi:10.1117/12.941680

17 February 1987 Surface Roughness Measurement By 2-D Digital Correlation Of Speckle Images

Bernhard Ruffing, Johannes Anschutz

Proceedings Volume 0814, Photomechanics and Speckle Metrology; (1987) https://doi.org/10.1117/12.941680
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

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.

Citation Download Citation

Bernhard Ruffing and Johannes Anschutz "Surface Roughness Measurement By 2-D Digital Correlation Of Speckle Images", Proc. SPIE 0814, Photomechanics and Speckle Metrology, (17 February 1987); https://doi.org/10.1117/12.941680

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