Hello,
I have been tolerancing some achromatic doublets using vendor presets in OpticStudio (specifically the Edmund Optics presets) and had a question regarding the expected changes in effective focal length.
Most of the lenses are manufactured to a tolerance of +/- 1-2% on the focal length, but the observed changes that I am seeing are smaller even when the tolerances are relaxed. For example, a 50 mm diameter 170 mm focal length doublet only has a focal length variation by 0.5 mm for 1000 monte carlo runs (wavelength is 632.8 nm)
Is there something that Zemax does not consider when tolerancing that is leading to this discrepancy? I also imagine that I could be missing something obvious!
Thank you,
Musab