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

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

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 iMin., 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