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PET and PVC separation system based on optical sensors
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Paper Abstract

In this work, we present experimental results of a cost-efficient photonic system capable to discriminate Polyvinyl Chloride (PVC) bottles from those made of Polyethylene Terephthalate (PET). The proposed array uses a semiconductor laser emitting at 810 nm, whose output is diverged employing a line lens in order to obtain a line light pattern. Given the lower attenuation coefficient of the PVC in comparison to PET at this wavelength, the received optical power is higher for the PVC than for the PET, which results in higher photogenerated current and, consequently, higher voltage after the transimpedance amplifier. Experiments considering several samples reveal an average voltage difference of 10% between materials, probing its feasibility for future industrial applications.

Paper Details

Date Published: 28 August 2015
PDF: 5 pages
Proc. SPIE 9609, Infrared Sensors, Devices, and Applications V, 96090T (28 August 2015); doi: 10.1117/12.2188840
Show Author Affiliations
G. G. Pérez-Sánchez, Univ. Autónoma Metropolitana (Mexico)
J. A. Álvarez Chávez, Ctr. de Investigación e Innovación Tecnológica (Mexico)
J. R. Pérez-Torres, Tecnológico de Estudios Superiores de Coacalco (Mexico)
A. Gómez-Vieyra, Univ. Autónoma Metropolitana (Mexico)

Published in SPIE Proceedings Vol. 9609:
Infrared Sensors, Devices, and Applications V
Paul D. LeVan; Ashok K. Sood; Priyalal Wijewarnasuriya; Arvind I. D'Souza, Editor(s)

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