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Non-Intrusive Technique for Measuring Refractive Index of Clear and Transparent Liquids

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4 Author(s)
Singh, H.K. ; Dept. of Electron. & Commun. Technol., Gauhati Univ., Guwahati, India ; Chamuah, N. ; Sarkar, D. ; Bezboruah, T.

We propose an optical technique for measuring refractive index of clear and transparent liquids. This technique senses change in refractive index of liquid by virtue of lateral displacement of a light beam that occurs due to refraction of the light beam after passing through the liquid medium. The transmitted light beam gradually looses its alignment with a photodetector as refractive index of the liquid changes. Experimental results have indicated that the proposed technique has the potential to measure refractive indexes with an accuracy of 10-4, and it has novelty of being a simple and non-intrusive one.

Published in:

Sensors Journal, IEEE  (Volume:14 ,  Issue: 2 )