Remote photonic sensing of glucose concentration via analysis of time varied speckle patterns

¹Faculty of Engineering and the Nano Technology Center, Bar-Ilan University, Ramat-Gan 52900, Israel

²ContinUse Biometrics Ltd., HaBarzel 32b st., Tel Aviv 6971048, Israel

³Departamento de Óptica, Universitat de València, C/Dr. Moliner 50, 46100 Burjassot, Spain

Adv. Mater. Lett., 2018, 9 (9), pp 624-628

DOI: 10.5185/amlett.2018.2054

Publication Date (Web): Jun 14, 2018

Copyright © IAAM-VBRI Press

E-mail: zeev.zalevsky@biu.ac.il

Abstract

The ability to perform a remote sensing of glucose in the blood stream can be very applicable. The novel method presented in this paper is based on two optical approaches both based on the extraction and analysis of the changes in the collected speckle field. The first physical effect used for the detection is the temporal changes of the back scattered secondary speckles produced in the skin due to the changes of the blood stream parameters as a function of the glucose concentration in the blood. These cardio related changes can be analyzed with different machine learning algorithms to enhance the sensitivity of the measurements. The second physical effect assisting in performing the remote glucose sensing is the Faraday rotation effect in which the polarization of linearly polarized light is rotated when scattered from materials exhibiting this effect while being exposed to a magnetic field.

Keywords

Sensors, speckles, glucose concentration detection.