JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser.
Ra is the arithmetic average of the absolute values of the profile height deviations from the mean line, recorded within the evaluation length. Ra neutralizes the few outlying points so that the extreme points...
The sampling length is usually defined as the cut-off length (λc) of the filter used to differentiate surface irregularity wavelengths as either roughness or waviness data on a measured primary profile.
Contact profilometers utilize a stylus that runs over the surface of an object to allow for measurement of various profile parameters. There are two general types of contact profilometers: Skidded and skidless.