Measurement method of spherical large curvature radius

Youhan Guo; Shunxin Liu; Ye Yang

doi:10.1117/12.978245

15 October 2012 Measurement method of spherical large curvature radius

Youhan Guo, Shunxin Liu, Ye Yang

Proceedings Volume 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 84171Z (2012) https://doi.org/10.1117/12.978245
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

This paper introduces a precision measurement method to obtain the radius of curvature between 1m ~ 5m. With the laser beam irradiating the surface of the measured sphere, translating it in order to achieve amounts of the changing of the reflection angle of the laser beam at different locations in the surface of the sphere, and obtain the value of the curvature radius of the sphere. Repeating to Measure different points of the sphere can eliminate the random error factors on the measurement results. Application of this measurement method, for the sphere with curvature radius in the 1m ~ 5m and diameter greater than 100mm, the measurement error ΔR / R is in the 2×10^-5 ~ 10^-4 or less. This method has high accuracy, and can be used to measure the curvature radius of both concave and convex surface.

Citation Download Citation

Youhan Guo, Shunxin Liu, and Ye Yang "Measurement method of spherical large curvature radius", Proc. SPIE 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 84171Z (15 October 2012); https://doi.org/10.1117/12.978245

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