focal length ratio 中文意思是什麼
focal length ratio
解釋
焦距比-
Numerical result illustrates that focal length becomes longer when incident wavelength becomes shorter, however the relationship between focal length and incident wavelength is n ' t absolute inverse ratio, it is that the increasing of focal length is faster than the decreasing of incident wavelength. at the same time the numerical result also show that scalar theory ca n ' t be used in the rigorous analysis of the dispersion property of subwavelength diffractive microlens
然後研究了亞波長衍射微透鏡的色散特性,表明亞波長衍射微透鏡的焦距隨著波長變短而增加,但是波長與焦距之間並非簡單的完全反比例關系,而是隨著波長的減小焦距增加得更快,同時指出標量理論已不能準確分析亞波長衍射微透鏡的色散特性。
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