Alternative phase-shifting technique for measuring full-field refractive index

Chen Kun-Huang; Chen Jing-Heng; Lin Jiun-YouChu Yen-Chang

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Alternative phase-shifting technique for measuring full-field refractive index

机译：Alternative phase-shifting technique for measuring full-field refractive index

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摘要

This study proposes an alternative and simple method for measuring full-field refractive index. This method is based on the phase-shifting technique with a modulated electro-optical (EO) modulator and the phenomenon of total internal reflection. To this purpose, a linear polarized light is expanded and incident on the interface between the prism and the tested specimen, and the reflected light passes through an analyzer for interference. The phase difference between the s- and p-polarized light is sensitive to the refractive index of the tested specimen when the total internal reflection appears on this interface. Based on this effect, the resulting phase differences make it possible to analyze the refractive index of the tested specimen through a phase-shifting technique with a modulated EO modulator. The feasibility of this method was verified by experiment, and the measurement resolution can reach a value of refractive index unit of at least 3.552 x 10(-4). This method has advantages of simple installation, ease of operation, and fast measurement. (C) The Authors. Published by SPIE under a Creative CommonsAttribution 3.0 Unported License.

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来源
《Optical Engineering》 |2015年第9期|094101-1-094101-5|共5页
作者
Chen Kun-Huang; Chen Jing-Heng; Lin Jiun-YouChu Yen-Chang;
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作者单位

Feng Chia Univ, Dept Photon, Taichung 40724, Taiwan;

Natl Changua Univ Educ, Dept Mechatron Engn, Changhua 50074, Taiwan;

Feng Chia Univ, PhD Program Elect & Commun Engn, Taichung 40724, TaiwanFeng Chia Univ, Dept Elect Engn, Taichung 40724, Taiwan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类计量学;光学仪器;
关键词
refractive index; total internal reflection; electro-optical modulator; phase-shifting interferometry;

Alternative phase-shifting technique for measuring full-field refractive index

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