Hello Yuan.Chen,

it seems your this zpl is very useful for converting CAD part surface to freeform surfaces. Now I have a few questions about this zpl application program:

1. what is the converting precision between CAD part surface and the surfaces fitted?
2. Doe it suitable for any CAD part surfaces including off-axis and non-symmetric surfaces?  During the replacement of the CAD file in the demo.zar file with the CAD parts which is needed to fit,  are there some parameters need be adjusted? such as the z position of source ray et al?
3. In the optimization process with the fitting.MF generated by the zpl application, how to the set the parameters in the sequential mode: object distance, object field height, size of aperture, stop aperture size, initial parameters of the surfaces such as radius, conic, and other non-linear terms coefficients? Do you have a description of the work principle of this step?  In the optimization processes, will the stop aperture move?
4. usually, how much the time is needed for a sample array size 1024X1024/

Thank you.

Bailin Zhang