@inproceedings{129d183663b340b6a5a7d7e9ecd3d4b1,
title = "Measurement of optical glass refractive index free from effect of environmental temperature",
abstract = "A method based on measurement of critical refraction angle is proposed for measurement of optical glass refractive index independent of environment temperature. The critical refraction angle difference between the test sample and a standard refractive index block is measured first, and then the refractive index difference is obtained by a linear regression algorithm and the refractive index of the sample can be calculated from it. The requirement for environmental temperature is 25±5 °C, which can be easily satisfied on the production line. Compared with the non-linear algorithm used for direct measurement, this method is simpler, more efficient, and can directly get the refractive index value at standard temperature. Experimental result shows that the measurement repeatability is 1×10-5. The method can be used for fast and accurate measurement of the refractive index for the same glass material in mass production (e.g. X-cube made of K9 optical glass).",
keywords = "Critical refractive angle, Fast measurement, Linear regression, Optical glass, Refractive index measurement",
author = "Ma, \{Jian Rong\} and Qun Hao and Zhu, \{Qiu Dong\} and Yao Hu and Xu Cheng",
year = "2010",
doi = "10.1117/12.885236",
language = "English",
isbn = "9780819479402",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Sixth International Symposium on Precision Engineering Measurements and Instrumentation",
note = "6th International Symposium on Precision Engineering Measurements and Instrumentation ; Conference date: 08-08-2010 Through 11-08-2010",
}