I don't have the expertise to directly answer to your questions, but maybe any of the followings can give you further insight:

• https://www.researchgate.net/publication/258785362_Irregular_surfaces_-_measurements_and_ZEMAX_simulations
• https://wp.optics.arizona.edu/optomech/wp-content/uploads/sites/53/2016/10/Tolerance-on-material-inhomogenity-and-surface-irregularity_wen-rui.pdf
• https://support.zemax.com/hc/en-us/articles/1500005577022-How-to-use-TEZI-to-tolerance-for-manufacturing-related-surface-sag-error
• https://support.zemax.com/hc/en-us/articles/1500005579062-Introduction-to-Rotationally-Symmetric-Irregularity-RSI-
• https://www.zemax.com/blogs/webinars/improved-endoscope-systems

I hope this could help, at least until someone more expert comes in.

Hello,

Thanks for your posts here on the forums!

For TEZI, the max tolerance value is the exact RMS error of the surface in lens units. The min tolerance value is automatically set to the negative of the max value; this is done to yield both positive and negative coefficients for the Zernike terms. The resulting RMS is always a positive number whose magnitude is equal to the max tolerance value.

You may find more details about the TEZI tolerance operand in the Help system at:

The Tolerance Tab > Tolerancing Group > Tolerance Data Editor > Tolerance Operands > TEZI: Tolerance on Surface Irregularity Using the Standard Zernike Model

Besides, you can find further references here in MyZemax:
 

Regarding the spatial frequency selection, you may find more details about it in this knowledegbase article:
https://support.zemax.com/hc/en-us/articles/1500005490441-Constructing-mid-spatial-frequency-tooling-errors-for-evaluation-and-tolerancing

I hope this helps, but if you have any further questions, please do not hesitate to ask!

Best,

Csilla

Alberto and Csilla,





the references you both provided are pertinent indeed. I appreciate very much your support.