標題: Liquid refractometer based on immersion diffractometry
作者: Lu, Sheng-Hua
Pan, Shan-Peng
Liu, Tzong-Shi
Kao, Ching-Fen
機械工程學系
Department of Mechanical Engineering
公開日期: 23-Jul-2007
摘要: This study presents a laser diffractometric refractometer for measuring the refractive index of liquids. The refractive index is determined by rotating a reflection grating that is immersed in the fluid under test, and measuring the first- order Littrow diffraction angle. The Littrow angle is easily detected form the interferogram formed by the diffracted beam from the grating and the reflected beam from the liquid surface. No special cell for liquids is required. The alignment and measuring processes are simpler than those of other refractometers. The results of a feasibility experiment reveal that the accuracy of the proposed approach is about 0.003 for a refractive index of around 1.3. (c) 2007 Optical Society of America.
URI: http://dx.doi.org/10.1364/OE.15.009470
http://hdl.handle.net/11536/10551
ISSN: 1094-4087
DOI: 10.1364/OE.15.009470
期刊: OPTICS EXPRESS
Volume: 15
Issue: 15
起始頁: 9470
結束頁: 9475
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