[16a-1E-1~11] 3.8 Optical measurement, instrumentation, and sensor

[16a-1E-10] Spectral imagery measurement of vegetation fluorescence using oxygen A band

〇Kenji Kuriyama¹, Naohiro Manago², Hayato Saitou², Hiroaki Kuze² (1.Shizuoka Univ., 2.Chiba Univ.)

Keywords:Vegetation fluorescence,solar radiation,oxygen A-band

Fluorescence spectra emitted from vegetation leaves provide direct information on the photosynthetic activities. We have developed a stand-off system that enables the observation of vegetation fluorescence through either the spectral measurement using a CCD spectrometer or the two-dimensional measurement of the fluorescence intensity distribution by means of a CCD camera equipped with a narrow-band optical filter centered at 760 nm, the wavelength of the oxygen A-band. Laboratory tests have been conducted with the help of a cold mirror: the elimination of infrared radiation reduces the leaf reflection, facilitating the detection of relatively weak fluorescence signals. Also, we describe the result of a stand-off, outdoor measurement on a boxtree for detecting solar radiation induced fluorescence (SRIF).