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Proceedings Paper

Algorithms for surface reconstruction from curvature data for freeform aspherics
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Paper Abstract

Increasing demand for highly accurate freeform aspheric surfaces requires accurate and efficient measurement techniques. One promising possibility uses a sub-aperture scanning system that measures local curvature variations across the part. In this paper, we develop and demonstrate two different data processing algorithms, a zonal approach using Southwell integration method and a modal approach leveraging Zernike curvature basis, that reconstruct the surface 3-dimensional profiles from the curvature data. The performance of suggested methods and the sensitivity to noise is diagnosed for various SNR (Signal-to-Noise Ratio) cases.

Paper Details

Date Published: 7 September 2013
PDF: 9 pages
Proc. SPIE 8838, Optical Manufacturing and Testing X, 88380B (7 September 2013); doi: 10.1117/12.2024285
Show Author Affiliations
Dae Wook Kim, College of Optical Sciences, The Univ. of Arizona (United States)
ByoungChang Kim, Kyungnam Univ. (Korea, Republic of)
Chunyu Zhao, College of Optical Sciences, The Univ. of Arizona (United States)
ChangJin Oh, College of Optical Sciences, The Univ. of Arizona (United States)
James H. Burge, College of Optical Sciences, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 8838:
Optical Manufacturing and Testing X
Oliver W. Fähnle; Ray Williamson; Dae Wook Kim, Editor(s)

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