Leds used as spectral selective light detectors in remote sensing techniques

WEBER, C.; RODRÍGUEZ, E. J. AND C., TOCHO, J. O.

Lima

Congreso; VII Iberoamerican Conference on Optics (RIAO) and X Latinoamerican Meeting on Optics, Lasers and Applications (OPTILAS); 2010

Pontificia Universidad Catolica del Perú

Remote sensing has been commonly considered as an effective technique indeveloping precision agriculture tools. Ground based and satellite spectral sensors have wideuses to retrieve remotely quantitative biophysical and biochemical characteristics of vegetationcanopies as well as vegetation ground cover. Usually in-field remote sensing technologies useeither a combination of interferential filters and photodiodes or different compactspectrometers to separate the spectral regions of interest.In this paper we present a new development of a sensor with LEDs used as spectrally selectivephotodetectors. Its performance was compared with a photodiode-filter sensor used inagronomic applications. Subsequent measurements of weed cover degree were performed andcompared with other methodologies. Results show that the new LEDs based sensor has similarfeatures that conventional ones to determining the weed soil cover degree; while LEDs basedsensor has comparative advantages related its very low manufacturing cost and its robustnesscompatible with agricultural field applications.Key words: Remote sensing, radiometry, photometers, weeds detection.