Hello everyone!
In my current optical design, I’m observing ray crossings at the image plane (as shown in the attached image). Optimizing for spot size at a posterior plane often turns out to be insufficient to correct this issue.
Is there any parameter, operand, or control in Zemax that can help manage or prevent this ray intersection so that the rays remain more orderly when reaching the image plane like trying to get a ‘perfect’ gaussian sphere as wavefront?
Thank you in advance!
“Spherical aberrations” is a magic term to describe what is happening.
“Spot size” is a good way to minimize them. You might need more variables to achieve the goal. Maybe you can use aspherical surfaces to get better performance.
Hi Egis, thank you for your reply! I know spherical aberration is noticeable here, but as shown in the screenshot, the “spot size” criterion doesn’t help much, it only reduces the spot size while the ray crossings still occur. I was already using aspherical surfaces.
What about your merit function?
Try to increase the number of “rings”
This is my optimization with two lenses - standard and asphere.
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