A new method on measuring radius of curvature of a conic aspherical mirror

Chuan-ke Huang; Yong-qian Wu; Bin Fan; Feng-tao Yan; Feng-wei Liu; Yong-hong Zhang

doi:10.1117/12.2070637

2 September 2014 A new method on measuring radius of curvature of a conic aspherical mirror

Chuan-ke Huang, Yong-qian Wu, Bin Fan, Feng-tao Yan, Feng-wei Liu, Yong-hong Zhang

Proceedings Volume 9280, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 928017 (2014) https://doi.org/10.1117/12.2070637
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

Abstract

We present a method to measure the radius of curvature of a concave conic asphere. By analysis the central area of the asphere, we can measure the radius of an arbitrary point in the central area instead of the vertex of asphere. In the procedure, we firstly adjust the interferometer until the interferogram of the central area approach nulls, then put the laser tracker ball at the beam focus of the interferometer and move the tracker ball to touch the central area of the aspherical surface to get the two positions. With these measurement data, we can calculate the radius of curvature of the aspherical vertex and its uncertainty.

Citation Download Citation

Chuan-ke Huang, Yong-qian Wu, Bin Fan, Feng-tao Yan, Feng-wei Liu, and Yong-hong Zhang "A new method on measuring radius of curvature of a conic aspherical mirror ", Proc. SPIE 9280, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 928017 (2 September 2014); https://doi.org/10.1117/12.2070637

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