I have .dat files in Zygo Mx software from lens surface measurements done at 0.6328 microns. I would like to apply the interferograms to lens surfaces in an OpticStudio model and evaluate the transmitted wavefront error at a wavelength of ~3 microns. How do I do this? So far I have exported a .int file from Mx and converted it to an OpticStudio .dat file. Then I imported the .dat file onto a Grid Sag surface in OpticStudio. However, when I look at the wavefront error at the image plane before and after importing the .dat file (Analyze, Wavefront, Wavefront Map), it is exactly the same, as if I never changed the surface. How can I get OpticStudio to “see” the interferogram on the surface? And if I change the wavelength in the OpticStudio model to be something other than 0.6328 microns, does it automatically scale the imported interferogram to give the correct result at the new wavelength?
Hi Jen
I don’t know if you have seen but we have a similar post here:
I think I would check the .dat values that you have.
Our .dat files can be used for a Grid sag in which case the values will be given in units of length or can be used for a Grid phase and the values will be in radians.
Maybe check the sag and/or phase using the analyses. That will give an idea:
Let us know if that works for you.
Hi Sandrine,
Thank you for the reply. It turns out that I was doing the steps to apply an interferogram as a grid sag surface correctly, but the version of OpticStudio I was using (21.2) was not converting .INT files to .DAT files as it should. In the converted .DAT file, the y-spacing of the data grid was always zero. I have since started using OpticStudio 22.1.1 and now things are working correctly. I can do a sag analysis on the surface and a wavefront analysis and see the effects of the .DAT file I imported.
Sincerely,
-Jen
Hi Jen
Thank you for your message. I had forgotten about this. Good to know that things are fixed now.
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