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Proceedings Paper

Research of fitting algorithm for coefficients of rotational symmetry aspheric lens
Author(s): Zhi-li Chen; Zong-da Guo; Qian Mi; Zhi-qiang Yang; Run-bing Bai
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Paper Abstract

The surface shape testing, data analyzing and dealing of aspheric surface lens are important guarantees of the process reliability and compensation correction. The stylus profilometry is usually used in the testing of aspheric lens. During testing the aspheric lens, all coefficients of the aspheric equation need be inputted firstly, and then the curve of error and evaluating parameters are obtained by comparing the actual surface shape curve with the theoretical curve. This article aims at the unknown coefficients rotational symmetry aspheric lens. Using the data from the Form Talysurf 2, we obtained the form coefficients and the form errors by the least square method and Levenberg-Marquardt algorithm. The result shows that, the fitting algorithm is short in the computing time, quick in the convergence, few in the iterative times, and good in the stability, and it can meet the demand of the ultra precise process and the examination.

Paper Details

Date Published: 20 May 2009
PDF: 4 pages
Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 72834O (20 May 2009); doi: 10.1117/12.833085
Show Author Affiliations
Zhi-li Chen, Xi'an Technological Univ. (China)
Zong-da Guo, Xi'an Technological Univ. (China)
Qian Mi, Xi'an Technological Univ. (China)
Zhi-qiang Yang, Xi'an Technological Univ. (China)
Run-bing Bai, Xi'an Technological Univ. (China)


Published in SPIE Proceedings Vol. 7283:
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; James C. Wyant; Robert A. Smythe; Hexin Wang, Editor(s)

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