С.И. Супельняк, С.А. Адарчин, С.С. Стрельченко, В.Г. Косушкин
6
Development of methods for determining the absorption
spectrum of biological systems by an example of plants
© S.I. Supelnyak, S.A. Adarchin, S.S. Strelchenko, V.G. Kosushkin
Kaluga Branch of Bauman Moscow State Technical University, Kaluga 248000, Russia
The purpose of the article is to study the optical characteristics of plants to create opti-
mal lighting sources. We examined the method of measuring the spectral characteristics
of biological systems on the example of cultivated plants.
It has been established, that the
absorption coefficient is significantly reduced when developing. As a result of construct-
ing an average weighted absorption spectrum of a crop plant leaf, it was revealed that
the absorption maxima belong to the region at wavelengths of 670 nm and 485 nm. Max-
imal changes in the absorption coefficient between the samples of the first cotyledons and
mature second sheet at wavelengths of 485 nm and 670 nm were respectively equal to
24,786 cm
–1
and 25.7 cm
–1
. We estimated measurement results and test methods, and
made conclusions about how to measure the absorption spectrum of cultivated plants. On
the bases of the measured absorption spectra of the selected leaf crop we expect to devel-
op an adaptive illuminator for crop production.
Keywords:
adaptive, absorption spectrum, the spectral characteristics, absorption coeffi-
cient.
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