Feff = m/(2*NA)mjkzz wrote: ↑Wed Dec 07, 2022 5:08 pmFurthermore, reading more in one of your PDF, titled "What's the depth of field (DOF) for a diffraction-limited lens?", you used f_eff . . . I agree with first term, which also agrees with Nikon's first term, and also says wave optics effect is only dependent on NA.
But the part underlined red seems to say the wave optics effect does depend on magnification because (m+1)/m is not always one, when focused to infinity, m approaches to zero, (m+1) / m would approach infinity, this contradicts with the first formula that says wave optics effect is only a function of NA, independent of m
So something about your definition of f_eff (feff), something does not add up as the two formulas in your PDF should agree with each other, but they do not.
Or is it my lack of knowledge in optics?
TDOF_qlwe = lambda/(NA*NA)
TDOF_qlwe = lambda * 4 * (Feff*Feff)/(m*m)
What about this does not agree?
--Rik