求一个函数的翻译？

So far we see that the cavity can be characterized in three equivalent ways: by its decay time, its finesse, and its losses.
      the finesse of the cavity by inspection of Eq. (12). The finesse is defined as the ratio of the cavity free-spectralrange (FSR) to the intensity response function full width at half-maximum。

中的finesse怎么翻译啊~文章里好多这个词~还有F函数~不知道怎么翻译才对~麻烦各位大侠了。

文献中这种函数不需要翻的吧，直接留英文名就可以，第一次出现时注明意义

需要翻译啊，不过我找到了，谢谢你！

finesse函数是谱线的精细度，定义为FSR/FW HM。FSR是自由光谱区，FW HM是峰值半宽度