Optical method at near-infrared to estimate the energy absorption of leaves

Ricardo Gonzalez-Romero; Roberto C. Barragan; Marija Strojnik; Roberto Carrasco Álvarez

doi:10.1117/12.3027139

3 October 2024 Optical method at near-infrared to estimate the energy absorption of leaves

Ricardo Gonzalez-Romero, Roberto C. Barragan, Marija Strojnik, Roberto Carrasco Álvarez

Proceedings Volume 13144, Infrared Remote Sensing and Instrumentation XXXII; 131440T (2024) https://doi.org/10.1117/12.3027139
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Conference Poster

Abstract

The estimation of caloric content of vegetation is relevant in areas such as biofuels and forest fire prevention. In this work we explore the transmission mechanism of infrared radiation through a leaf by finite element analysis to determine the energy transmission and reflection. We quantify the absorption inside the leaf using a wavelength at 1064 nm. The results obtained are determined experimentally at incidence normal to the leaf surface. We use an infrared laser source, controlling its power settings and a neutral density filter for step-wise power increments. We assumed a non-porous, uniform material, a constant refractive index. We select a specific absorption coefficient according to the senescent state of the leaf. The results describe the relationship between the absorption measured experimentally and computed by finite element analysis (FEA).

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ricardo Gonzalez-Romero, Roberto C. Barragan, Marija Strojnik, and Roberto Carrasco Álvarez "Optical method at near-infrared to estimate the energy absorption of leaves", Proc. SPIE 13144, Infrared Remote Sensing and Instrumentation XXXII, 131440T (3 October 2024); https://doi.org/10.1117/12.3027139

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