Two optofluidic devices for the refractive index measurement of fluids

Kuo Sheng Chao, Tsung Yu Lin, Ruey-Jen Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Two simple optofluidic devices based on a microprism and a refraction channel, respectively, are proposed for measuring the refractive index of fluids. The microprism chip consists of a liquid optical waveguide channel and a single triangular chamber filled with the test fluid, while the refraction channel chip consists of a single turning channel which functions as a liquid-core/solid-cladding optical waveguide. In both chips, the refractive index of the test fluid is calculated from a CCD image of the refracted ray in accordance with simple geometrical optics principles. The experimental results show that the refraction channel chip provides a more accurate measurement performance than the microprism chip; particularly for colloidal samples. However, the refraction channel chip is suitable only for the measurement of fluids with a refractive index greater than that of the chip substrate. Overall, the results presented in this study show that both devices provide a simple, low cost and effective means of determining the refractive index of a wide range of common test fluids.

Original languageEnglish
Title of host publicationNEMS 2011 - 6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems
Pages381-384
Number of pages4
DOIs
Publication statusPublished - 2011 Oct 4
Event6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2011 - Kaohsiung, Taiwan
Duration: 2011 Feb 202011 Feb 23

Publication series

NameNEMS 2011 - 6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems

Other

Other6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2011
CountryTaiwan
CityKaohsiung
Period11-02-2011-02-23

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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  • Cite this

    Chao, K. S., Lin, T. Y., & Yang, R-J. (2011). Two optofluidic devices for the refractive index measurement of fluids. In NEMS 2011 - 6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (pp. 381-384). [6017372] (NEMS 2011 - 6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems). https://doi.org/10.1109/NEMS.2011.6017372