Skip to main content

Laser speckle roughness measurement of grit-blasted surfaces

Buy Article:

$17.00 plus tax (Refund Policy)

The surface roughness of grit-blasted steel specimens has been measured using a non-contact method based on the correlation of speckle images derived at different incidence angles. Measurements of roughness using the speckle method agreed to within ∼±1.5 μm with independently measured average surface roughness derived using a surface profilometer.

It was noted that although the speckle analysis predicted RMS roughness, better agreement with reference roughness measurements was obtained with the speckle measurements of average roughness.

It was shown that errors in the measurement accuracy arose from lens aberrations, image miscorrelation due to the finite pixel size relative to the speckle size and shadowing of the laser beam by the surface. A sub-pixel image correlation method was demonstrated for the correction of errors associated with pixel miscorrelation.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics


Document Type: Research Article

Publication date: 2012-10-01

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more