I am trying to simultaneously model the effects of mechanical sag and thermal expansion and contraction on the optical system as a whole. I have already successfully accomplished the latter using a Multi-Config setup I obtained by pressing the "Make Thermal" button and editing the result to suit my scenarios.
If I then tilt all surfaces besides Object and Image by the same amount (say, 0.1 degrees about , according to the grid distortion output, the boresight ray still impinges on (0, 0) on the image plane, which makes no sense to me. That boresight ray ought to be hitting the image plane at an offset of around EFL * tan(0.1 degrees) from (0, 0).
Something I have read in the Knowledgebase suggested that I should try this stunt in global coordinates to get the expected result. However, when I try to convert from Local to Global Coordinates, I get this error:
Does that mean I can model multi-config thermal effects, or mechanical (tilt) effects, but not both at the same time?
My Zemax version is OpticStudio 19.8 Professional 64-bit, running on Windows 10.
Daniel
Best answer by Hui Chen
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