Focal length and radius of curvature measurement using wavefront difference method

Zhongming Yang; Zhishan Gao; Shuai Wang; Jinlong Cheng; Qun Yuan

doi:10.1117/12.2199654

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8 October 2015 Focal length and radius of curvature measurement using wavefront difference method

Zhongming Yang, Zhishan Gao, Shuai Wang, Jinlong Cheng, Qun Yuan

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Proceedings Volume 9677, AOPC 2015: Optical Test, Measurement, and Equipment; 96771C (2015) https://doi.org/10.1117/12.2199654
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

A method for measuring the focal length of the lens and the radius of curvature of the spherical surface using wavefront difference method is proposed. Based on Fizeau interferometer, an experimental system for focal length measurements is set up to verify the principle. Based on the point diffraction interferometer, an experimental system for radius of curvature measurements is proposed to verify the proposed method. With the focal length testing system, both the positive and negative lens experimental results indicate that the measurement accuracy is less than 0.16%under normal experimental environment. With the radius of curvature testing system, the radius of curvature of spherical mirrors and the surface figure can be measured in a higher precision simultaneously. The experimental results indicate that the measurement accuracy is in the order of 10^-4 .

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Zhongming Yang, Zhishan Gao, Shuai Wang, Jinlong Cheng, and Qun Yuan "Focal length and radius of curvature measurement using wavefront difference method", Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 96771C (8 October 2015); https://doi.org/10.1117/12.2199654

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