1987-10-01

Material Dependency on Optical Surface Roughness Measurements 871946

Surface roughness measurement has been dominated by profilometers for years. The alternative optical methods offer advantages such as non-contact and high speed, therefore, they are more attractive to industries which would like to achieve on-line 100% inspection. In this study, a pair of photodetectors was used to detect the Intensity Ratio (IR) reflected from a ground metal surface, which was illuminated by a white light source. These IR values were plotted against the mechanical surface roughness Ra values and a good correlation was found. This study tested aluminum, brass, copper, stainless steel and tool steel in the roughness range from 0.08 to 2.54 microns (3 to 100 micro inches) Ra. The resulting IR curves varied uniquely.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: Purchase more aerospace standards and aerospace material specifications and save! AeroPaks off a customized subscription plan that lets you pay for just the documents that you need, when you need them.
X