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详细介绍用等效折射率概念设计短波通滤光片的原理和计算方法。
The principle and calculation method to design short-wavelength pass filters with a concept of equivalent refractive index is presented in this paper.
采用短波通滤光片可直接获得荧光光谱，不同植物种类荧光光谱差异明显。
Similarly, fluorescence spectra were derived from reflectance under illumination with short pass filters directly. Obvious differences in fluorescence spectra were founded in different kinds of plant.
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