为什么非primary波长的波前差在单色和复色情况下有时候会发生变化
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先说结论：因为这两种选项使用的参考点不一样，单色的时候对应的是被选波长的主光线，复色的时候则是选择primary wavelength(一时不知道怎么翻译了，又有点懒得查，就先这样了~）
出自：The Analyze Tab (sequential ui mode) > Image Quality Group > Aberrations (Image Quality Group) > Optical Path Difference
If "All" wavelengths are shown, then the plot is referenced to the primary wavelength based reference sphere and chief ray. The resulting OPD values, however, are in terms of waves of each respective wavelength. If monochromatic, then the reference sphere and chief ray for the selected wavelength is used as a reference. For this reason, the data for non-primary wavelengths could change when switching between monochromatic and polychromatic displays.
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