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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 20 — Oct. 15, 2009
  • pp: 3175–3177

Impact of surface roughness on laser surface authentication signatures under linear and rotational displacements

Peter R. Seem, James D.R. Buchanan, and Russell P. Cowburn  »View Author Affiliations

Optics Letters, Vol. 34, Issue 20, pp. 3175-3177 (2009)

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Laser surface authentication (LSA) is a technique for authenticating optically rough surfaces based on the intensity of diffusely scattered light. The degradation in the LSA signature over linear and rotational displacement is examined. Randomly roughened glass surfaces with roughness amplitudes ranging from 0.4 μ m to 3 μ m and correlation lengths from 16 μ m to 45 μ m are examined experimentally, showing that the average size of the surface feature has a negligible impact on the rate of LSA signature degradation. The average size of the surface features is shown to have a greater effect on the fractional intensity of the variations in diffuse light and on the quality of LSA signature match.

© 2009 Optical Society of America

OCIS Codes
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(120.6660) Instrumentation, measurement, and metrology : Surface measurements, roughness
(280.3420) Remote sensing and sensors : Laser sensors
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: June 15, 2009
Revised Manuscript: July 24, 2009
Manuscript Accepted: September 8, 2009
Published: October 9, 2009

Peter R. Seem, James D. Buchanan, and Russell P. Cowburn, "Impact of surface roughness on laser surface authentication signatures under linear and rotational displacements," Opt. Lett. 34, 3175-3177 (2009)

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