Optical modeling of light scattering for refractive-index detection of liquids in a microcapillary with low-coherence rainbow diffractometry

Grzegorz Świrniak

doi:10.1117/12.2273009

6 September 2017 Optical modeling of light scattering for refractive-index detection of liquids in a microcapillary with low-coherence rainbow diffractometry

Grzegorz Świrniak

Author Affiliations +

Proceedings Volume 10374, Optical Modeling and Performance Predictions IX; 103740K (2017) https://doi.org/10.1117/12.2273009
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

This work provides a numerical analysis of elastic light scattering by a fused silica capillary for noninvasive sensing of the refractive index for the purposes of capillary electrophoresis (CE). A capillary containing the sample liquid is illuminated by a beam of light of low temporal coherence. The scattering far-field pattern is analyzed in the vicinity of multiple primary rainbows. The paper offers both explanation of the scattering mechanisms contributing to the far-field intensity pattern based on numerical simulations as well as an analysis of the sensitivity of the measurement data to changes in the refractive index.

Citation Download Citation

Grzegorz Świrniak "Optical modeling of light scattering for refractive-index detection of liquids in a microcapillary with low-coherence rainbow diffractometry", Proc. SPIE 10374, Optical Modeling and Performance Predictions IX, 103740K (6 September 2017); https://doi.org/10.1117/12.2273009

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