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Opto-Mechanical Methodology for Feature Detection of Contours

[+] Author Affiliations
Devdas Shetty, Claudio Campana, Robert Dinan, Anil Gurimitkala, Nikolay Nazaryan, Saeid Moslehpour

University of Hartford, Hartford, CT

Paper No. IMECE2011-64220, pp. 629-638; 10 pages
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 3: Design and Manufacturing
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5489-1
  • Copyright © 2011 by ASME


Precise measurement of curvature is of critical importance in the aerospace industry. This paper presents a methodology for non-contact measurement of radius of curvature on the finished surface of manufactured parts. Unique optical methods including a Line Laser and a backlight are explored. In each case, a light source illuminates the features to be measured and several sets of high-contrast images are produced. For that purpose a low power (2mW) Helium-Neon (HeNe) laser source has been used. The images are processed using specific software and data points are mapped along the region of interest. A mathematical relationship is used to extrapolate the radius of curvature from the measured data.

Copyright © 2011 by ASME



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