PET and PVC separation system based on optical sensors

G. G. Pérez-Sánchez; J. A. Álvarez Chávez; J. R. Pérez-Torres; A. Gómez-Vieyra

doi:10.1117/12.2188840

28 August 2015 PET and PVC separation system based on optical sensors

G. G. Pérez-Sánchez, J. A. Álvarez Chávez, J. R. Pérez-Torres, A. Gómez-Vieyra

Proceedings Volume 9609, Infrared Sensors, Devices, and Applications V; 96090T (2015) https://doi.org/10.1117/12.2188840
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

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.

Citation Download Citation

G. G. Pérez-Sánchez, J. A. Álvarez Chávez, J. R. Pérez-Torres, and A. Gómez-Vieyra "PET and PVC separation system based on optical sensors", Proc. SPIE 9609, Infrared Sensors, Devices, and Applications V, 96090T (28 August 2015); https://doi.org/10.1117/12.2188840

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