標題: A method for measuring the complex refractive index of a turbid medium
作者: Jian, ZC
Lin, JY
Hsieh, PJ
Chen, HW
Su, DC
光電工程學系
Department of Photonics
關鍵字: heterodyne interferometry;complex refractive index;turbid medium
公開日期: 2005
摘要: Based on the heterodyne interferometry and Fresnel equations, an alternative method for measuring the complex refractive index of a turbid medium. A light beam is incident on the boundary between a right-angle prism and a turbid medium. The phase difference between s- and p- polarizations of the reflected light occurs. The phase difference depends on then incident angle and the complex refractive index of a turbid medium-, their relation can be derived from Fresnel equations. The phase difference can be measured accurately with the heterodyne interferometry. Because there are two unknown parameters to be estimated, at least the phase differences under two different conditions should be measured. Then, these measured data are substituted into the derived relation, and a set simultaneous equation is obtained. If the simultaneous equation is solved. the complex refractive index can be estimated. Because the reflected light from the boundary is measured, the scattering noises coming from the turbidity of the tested medium can be greatly reduced. In addition, this method has some merits such as simple optical setup, high sensitivity, high stability, and suitability for a little amount of the tested medium in its native state (without dilution).
URI: http://hdl.handle.net/11536/17611
http://dx.doi.org/10.1117/12.612482
ISBN: 0-8194-5856-2
ISSN: 0277-786X
DOI: 10.1117/12.612482
期刊: Optical Measurement Systems for Industrial Inspection IV, Pts 1 and 2
Volume: 5856
起始頁: 1036
結束頁: 1043
顯示於類別:會議論文


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  1. 000231416400119.pdf