本文讨论了光学吸收和光电子逸出深度与多碱光阴极厚度的关系；从理论上分析了透射式多碱光阴极的最佳厚度。
In this paper, the relationships between the thickness and the optical absorption of photocathode and the escape depth of photoelectron are discussed.
首先模拟分析半无限大介质模型中的荧光，认为最终逸出组织表面的荧光在组织中的产率是深度的函数；
We found that the flux rate of fluorescence in tissue is the function of the depth on the assumption that tissue is semi infinite media.
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