Abstract
A device for measuring the oxygen concentration inside packages in modified atmosphere working in a completely non-intrusive way has been developed and tested. The device uses tunable diode laser spectroscopy in a geometry similar to a short distance LIDAR: A laser beam is sent through the top film of a food package, and the absorption is measured by detecting the light scattered by the bottom of the container or by a portion of the food herein contained. The device can operate completely in a contactless way from the package, and the distances of absorption both outside and inside the package are measured with a triangulation system. The performances of the device have been tested for various types of containers, and absolute values for the oxygen concentration have been compared with standard albeit destructive measurements.
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Cocola, L., Fedel, M., Poletto, L. et al. Laser spectroscopy for totally non-intrusive detection of oxygen in modified atmosphere food packages. Appl. Phys. B 119, 37–44 (2015). https://doi.org/10.1007/s00340-015-6025-0
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DOI: https://doi.org/10.1007/s00340-015-6025-0