Citation

Piccardi A, Colace L. Sensors (Basel) 2019; 19(6): s19061360.

Affiliation

NooEL-Nonlinear Optics and OptoElectronics Laboratory and CNIT-Photonic Networks and Technologies National Lab, Department of Engineering, University ROMA TRE, Via Vito Volterra 62, 00146 Rome, Italy. lorenzo.colace@uniroma3.it.

Copyright

(Copyright © 2019, MDPI: Multidisciplinary Digital Publishing Institute)

DOI

10.3390/s19061360

PMID

30893767

Abstract

We demonstrated an optical method to evaluate the state of asphalt due to the presence of atmospheric agents using the measurement of the polarization/depolarization state of near infrared radiation. Different sensing geometries were studied to determine the most efficient ones in terms of performance, reliability and compactness. Our results showed that we could distinguish between a safe surface and three different dangerous surfaces, demonstrating the reliability and selectivity of the proposed approach and its suitability for implementing a sensor.

Language: en

Keywords

optical sensor; polarization contrast ratio; polarized scattering; scattering from rough surfaces