[16a-1E-1~11] 3.8 光計測技術・機器

[16a-1E-10] 酸素Aバンドを利用した植物蛍光の分光画像計測

〇栗山 健二¹、眞子 直弘²、斉藤 隼人²、久世 宏明² (1.静岡大工、2.千葉大 CEReS)

キーワード：植物蛍光、太陽光励起、酸素Aバンド

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).