TITLE

Fresnel reflectance in refractive index estimation of light scattering solid particles in immersion liquid

AUTHOR(S)
Räty, J.; Niskanen, I.; Peiponen, K.-E.
PUB. DATE
June 2010
SOURCE
Applied Physics Letters;6/7/2010, Vol. 96 Issue 23, p231112
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The refractive index of homogenous particle population can be determined by the so-called immersion liquid method. The idea is to find a known liquid whose refractive index matches the index of the particles. We report on a method that simultaneously obtains the refractive index of particles and that of the immersion liquid. It is based on a system using internal light reflection and Fresnel’s theory. The method includes a series of straightforward reflection measurements and a fitting procedure. The validity of the method was tested with CaF2 particles. The method has applications within scientific studies of microparticles and nanoparticles or micro-organism in suspensions. It can be also be utilized in industry for the detection of the refractive index of products involving particles for the purpose of improvement of product quality.
ACCESSION #
51378956

 

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