Hi all,
I try to use Zemax Element Drawing for my tolerance analysis report. However, I found the value of Radius tolerance after I clicked Reset from TDE are not consistent with values from Tolerance Data Editor. The below picture shows that the tolerance for surface 1 is 0.0366 (note: my first surface is 2), however the TRAD for surface 2 is +/-0.1. Could someone explain what happened here?
Thanks,
Xiaolei
Best answer by Christian Zimmermann
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Hi Xiaolei,
you need to consider that “Min” and “Max” as given in Tolerance Data Editor (TDE) are meant as boundary values. Thus all possible numeric values according to a certain distribution (gaussian, parabolic, linear etc.) will stay within a determined interval [Min., Max] when applying a Monte-Carlo-Analysis. The results you obtained in your specific Zemax MC run for Surface 1 to 3 are in agreement with the chosen boundaries for Min. and Max.
Example Analysis:
Surface 1: -0.1000 < 0.0366 < 0.1000
Surface 2: -0.1000 < 0.0299 < 0.1000
Surface 3: -0.3200 < 0.2300 < 0.3200 ( Note that TRAD on Surf4 differ from other surfaces before)
Keep also in mind that TRAD values for each “Monte-Carlo Scenario” will be randomly generated!
I hope this interpretation helps you.
Kind regards,
Christian
Hi Christian,
You are right, 0.0366, 0.0299 and 0.23 are all radius tolerance value (deviation from nominal design) for surface 1, 2 and 3. However the TDE shows that radius tolerance value for surface 1,2 and 3 are 0.1, 0.1, 0.32. Why they are not consistent?
Thanks,
Xiaolei
Hello xiaoleiwang,
having a look at the screenshot you added I expect given values to be tolerance on radius instead of radius iteself. There is a certain panel named “Tolerances” above the entries “Surface 1” … “Surface 3” and thus radius should be deviation from given nominal value.
I hope this answer is helpful for you.
Kind regards,
Christian
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