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Optical Engineering

Optical sensing of surface roughness and waviness by a computer-generated hologram
Author(s): Jari T. Rasanen; Markku Savolainen; Raimo Veil Johannes Silvennoinen; Kai-Erik Peiponen
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Paper Abstract

An optical surface roughness and waviness sensor for sufficiently smooth surfaces is introduced. The sensor is based on a computer-generated hologram , which focuses the specular reflectance to desired spots on the focal plane. Computer simulations were made to analyze the system and to compute the calibration curve. Contrast analysis was performed to estimate the average roughness of Gaussian surfaces. Results are compared with data measured form surface roughness standards.

Paper Details

Date Published: 1 September 1995
PDF: 7 pages
Opt. Eng. 34(9) doi: 10.1117/12.208093
Published in: Optical Engineering Volume 34, Issue 9
Show Author Affiliations
Jari T. Rasanen, Univ. of Joensuu (Finland)
Markku Savolainen, Univ. of Joensuu (Finland)
Raimo Veil Johannes Silvennoinen, Hokkaido Univ. (Finland)
Kai-Erik Peiponen, Univ. of Joensuu (Finland)

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