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Optical Engineering

Reconstructing a shadow pattern image of the internal surface of a small hole and estimating surface roughness from the image
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Paper Abstract

A non-destructive method used to estimate internal surface roughness of a small hole (0.2 mm in diameter and 0.7 mm in depth) is described. The first step of this method is to reconstruct a shadow pattern image of the internal surface from a series of optically sectioned images of the surface. The surface roughness parameters are then calculated from this shadow pattern image. The method is verified by measuring a known flat surface and comparing the results with stylus measurements.

Paper Details

Date Published: 1 August 1997
PDF: 6 pages
Opt. Eng. 36(8) doi: 10.1117/1.601442
Published in: Optical Engineering Volume 36, Issue 8
Show Author Affiliations
Zhige Zhang, Univ. of Warwick (United Kingdom)
Peter John Bryanston-Cross, Univ. of Warwick (United Kingdom)
David J. Whitehouse, Univ. of Warwick (United Kingdom)

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