Abstract

In this work a laser scanning setup was designed and constructed by using Laserspeckle technique, in which a linear relationship between Laser speckle Contrastand surface roughness . During the work standard stainless steel rough Surface wasbeen used. From the results it is found that incident angle HAS a great influence on themeasurements and this due to the saturation phenomena. For Incident angle (15°)saturation takes place with(R=0.12 μm) AND for more roughness the contrastdecreased .When the incident angel become (30°) the contrast saturated at ( R= 0.12μm) and stay constant for more roughness . At angle (75°) saturation in CONTRASTTAKES place at(R=0.4μm) and the value of contrast less than that of 15° and 30°angles.

The article was added to IASJ on 2012-05-09

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