Refractive index gradient measurement method based on the principle of Mach-Zehnder interference

Mingyang Shang; Feng Xu; Yujia Yao; Guobing Tian; Penglei Zheng; Zhengwen Hu

doi:10.1117/12.2506470

18 January 2019 Refractive index gradient measurement method based on the principle of Mach-Zehnder interference

Mingyang Shang, Feng Xu, Yujia Yao, Guobing Tian, Penglei Zheng, Zhengwen Hu

Proceedings Volume 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment; 108391A (2019) https://doi.org/10.1117/12.2506470
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

In this paper, the radial refractive index change of the grin lens is measured based on the principle of Mach-Zehnder interference. Using an image sensor to obtain experimentally detected images, the computer-derived interference pattern is subjected to grayscale stretching and filtering, and then the center position of the interference ring and the distance between the interference rings are determined to obtain the refraction of the grin lens. The rate changes. Through experiments, the actual samples of different thicknesses were tested, and the measurement accuracy can reach 10^-4.

Citation Download Citation

Mingyang Shang, Feng Xu, Yujia Yao, Guobing Tian, Penglei Zheng, and Zhengwen Hu "Refractive index gradient measurement method based on the principle of Mach-Zehnder interference", Proc. SPIE 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 108391A (18 January 2019); https://doi.org/10.1117/12.2506470

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