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Proceedings Paper

Two novel methods for liquid refractive index or concentration measurement using reflex fiber optic sensors
Author(s): Bao-jin Peng; Xu Wan; Hui Wang; Hong-zhen Jin; Yong Zhao
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Paper Abstract

Two novel content meters for liquid refractive index or concentration measurement are proposed based on the simple reflex fiber optic sensor configurations. One sensor exploits a reflex and concentrically arranged fiber probe structure which is very similar to the traditional intensity-modulated fiber optic displacement sensors, but the light captured by receiving fibers is modulated by the varied solute concentration, being in proportion to the liquid refractive index, instead of displacement. The other sensor works based on detecting the edge shift of the reflected light spot, which is modulated by the refractive index variation of the liquid. Theoretical analysis and simulations are carried out with the measurement range of refractive index from 1.0 to 1.5.

Paper Details

Date Published: 1 February 2006
PDF: 6 pages
Proc. SPIE 6034, ICO20: Optical Design and Fabrication, 603411 (1 February 2006); doi: 10.1117/12.668124
Show Author Affiliations
Bao-jin Peng, Zhejiang Normal Univ. (China)
Xu Wan, Zhejiang Normal Univ. (China)
Hui Wang, Zhejiang Normal Univ. (China)
Hong-zhen Jin, Zhejiang Normal Univ. (China)
Yong Zhao, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 6034:
ICO20: Optical Design and Fabrication
James Breckinridge; Yongtian Wang, Editor(s)

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