Infrared Reflectances of Plant Leaves

Abstract

The total spectral reflectances of leaves have been measured over the wavelength range 2-12 [mu]m or 2-14 [mu]m for 15 plant species, and at the wavelengths 8, 10, and 12 [mu]m for a further 32 species, the radiation being incident at 10[degree] to the normal. At wavelengths greater than 3 [mu]m the reflectances are less than 0.05 for the majority of the leaves, and values greater than 0.1 have been obtained for leaves from only one species. In the 2-3 [mu]m region higher values of reflectance are common.