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Proceedings Paper

Development of an instrument for measuring curvature of a lens
Author(s): Chilie Tan; Bin Lin; Bo Chen; Xiangqun Cao; Taicai Pan; Wei Jin
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Paper Abstract

A new edge detection method based on nonlinear fitting is used in the measurement of the curvature of lens in this paper. Non-contact Newton's rings are formed by an interferometer. In order to detect the diameters of dark rings and calculate the lens radius of curvature, the edge detection method is used for the image process. The auto-measuring system of lens curvature captures the gray scale image by CMOS image sensor, and then processes the data and calculates the position by a microprocessor. The scale of image pixels corresponding to Newton's rings that are related to the radius of curvature is obtained by scanning fringes or other optical methods. The accuracy of measurement is better than 0.3 percent.

Paper Details

Date Published: 19 May 2006
PDF: 5 pages
Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 615005 (19 May 2006); doi: 10.1117/12.677962
Show Author Affiliations
Chilie Tan, Zhejiang Univ. (China)
Bin Lin, Zhejiang Univ. (China)
Bo Chen, Zhejiang Univ. (China)
Xiangqun Cao, Zhejiang Univ. (China)
Taicai Pan, Zhejiang Univ. (China)
Wei Jin, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 6150:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Xun Hou; Jiahu Yuan; James C. Wyant; Hexin Wang; Sen Han, Editor(s)

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