6 March 2014 Optofluidic prism refractometer
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Abstract
This paper describes a simple method of measuring refractive indices of liquids with a small hollow prism. When a He-Ne laser beam is sent to the liquid filled prism it is angularly deviated or deflected. If different liquids are injected in the prism, one at a time, the angular position of the emerging beam changes. These angular positions are detected by an optical fiber that samples a small area of the Gaussian beam cross section. A calibration curve relating intensity as a function of the liquid refractive index is obtained.
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Sergio Calixto, Areli Montes-Perez, Guillermo Garnica, "Optofluidic prism refractometer", Proc. SPIE 8976, Microfluidics, BioMEMS, and Medical Microsystems XII, 89761D (6 March 2014); doi: 10.1117/12.2036788; https://doi.org/10.1117/12.2036788
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