I need to create two maps (grids) presenting deviation of:
- best, on-axis focus vs its position on the filed ( on-axis focus vs the amount of off-axis defocus)
- on-axis PSF vs off-axis PSF
The closest things I found in Zemax is Grid Distortion. How to get started with this mapping? Where from to extract this information. I don’t mind long and laborious work :) I will be grateful for any tips.
Best answer by MichaelHView original
CEHYoperands. This will calculate the centroid location in X/Y for the Huygens PSF (you cannot use the FFT PSF because FFT is calculated in pupil space while Huygens is calculated at the image plane). This will give you X/Y values w.r.t. to the local vertex of the image plane. You can then use
PARYto get the paraxial Chief Ray location (which would be the red bracket you have shown above) or simply compare each off-axis CEHX/CEHY to the on-axis CEHX/CEHY.
Thank you for your advice. I have a feeling that I wasn’t clear in my question - my apology.
So this is my system, 2 galvo mirrors, scan, tube, and paraxial lens.
I am expected that this shift will increase with the distance from the centre of the image. I need to set a few coordinates points in the form of the map for different scanning angles, and measure the shift between them for example the deviation between points (-2, 2) and (-2’, 2).
Regarding PSF, I cannot check it yet, my Zemax is crushing when I am using this tool.