NSC Detector Pixel Value = "NA"

Question

Since the latest Zemax update my files no longer work when I conduct a ray trace, all my files crash terminating Zemax. I’ve rolled back to 23.1 and I can do a ray trace again without my files crashing (sometimes because I saved the file in 23.2 and it changed something in the file older versions of Zemax don’t like), but I have now run across another issue.

When I do a ray trace I get “NA” for pixel values on both surface and rectangular detectors. Does anyone have any experience seeing this? Is it something I have changed that could cause this?

David.Nguyen · Accepted Answer

Hi @Michaelkm8,I’m not sure about the crashes that you experience without further information. Regarding the Detector Viewer, have you checked the actual values in the Text tab (bottom-left of Detector Viewer window)? Is there any NaN values in there? I’ve seen this behaviourhappen in places where thre’s no ray falling onto the Detector, but usually the Text tab has the actual value (0.0 in this case). So it could just be a UI issue.Take care,David

Michaelkm8 · Answer

OK yes it looks like I needed to increase the analysis rays which is strange. I wonder why the detector still showed the illumination profile even if the value was zero or NaN?

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