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The Application of Surface Fairing Technique in Progressive Lens Processing

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Abstract:

Based on the analysis of characteristics of progressive lens, it can be found that lens uneven change of curvature is an important reason of defect on progressive lens processed by single-point diamond cutting technique. By applying least square fairing method to fair the surface which is fitted and interpolated by Double Cubic B-Spline method, the curvature change of progressive surface becomes even. The processing experiment shows that the method in this paper can eliminate the defect effectively in the ultra-precision processing of progressive lenses.

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Periodical:

Key Engineering Materials (Volumes 364-366)

Pages:

1246-1250

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.364-366.1246

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Online since:

December 2007

Authors:

Jian Jun Du, Suet To, Chi Fai Cheung, Wing Bun Lee, Xiang Wen Miao

Keywords:

Least-Square Method (LSM), Progressive Lens, Surface Fairing

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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References

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