Computer simulation of PPF distribution under blue and red LED light source for plant growth.
Computer simulation of PPF distribution under blue and red LED light source for plant growth.
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植物生长蓝色和红色 LED 光源下 PPF 分布的计算机模拟。
DOI：
10.17660/actahortic.1996.440.50
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
T. Yanagi
中科院分区：
文献类型：
--
作者：
S. Takita;K. Okamoto;T. Yanagi
“蓝光发光二极管（LED）发光光谱”和“红光LED发光光谱”的叠加模式与叶绿素的光吸收光谱相对应。如果将这两种LED用作光源，各种植物栽培实验都是可能的。使用这种光源的栽培实验正变得越来越活跃，并且在这种实验中，了解对光合作用产生重要影响的光合光子通量（PPF）的分布是非常重要的。因此，我们已经开发了一个计算机模拟系统，它可以可视化的PPF分布下的光源配备了蓝色和红色LED。在该系统中，LED被假定为点光源，并且仅考虑从LED直接发射的光子。该模拟系统可以显示PPF分布的透视图、分布的横截面和纵截面以及分布的等高线图。此外，可以显示由蓝色LED发射的PPF的值与由蓝色和红色LED发射的PPF的值的比率的等高线图。由于在我们的系统中，根据PPF的大小，通过彩色线来实现表示，用户可以很好地理解和评估PPF的状态。
The superimposed pattern of "luminescence spectrum of blue light emitting diode (LED)" and "that of red LED", corresponds well to light absorption spectrum of chlorophyll. If these two kinds of LED are used as a light source, various plant cultivation experiments are possible. The cultivation experiments which use such light sources are becoming increasingly active, and in such experiments, it is very important to know the distribution of the photosynthetic photon flux (PPF) which exerts an important influence on photosynthesis. Therefore, we have developed a computer simulation system which can visualize the PPF distribution under a light source equipped with blue and red LEDs. In this system, an LED is assumed to be a point light source, and only the photons which are emitted directly from LED are considered. This simulation system can display a perspective view of the PPF distribution, a transverse and a longitudinal section of the distribution, and a contour map of the distribution. Moreover, a contour map of the ratio of the value of the PPF emitted by blue LEDs to that by blue and red LEDs can be displayed. As the representation is achieved by colored lines according to the magnitudes of the PPF in our system, a user can understand and evaluate the state of the PPF well.