how to check NA in image space when using diffraction grating.
For example below is a simple 2f:2f paraxial simulation, the NA in the object space is 0.1, so the NA in image space is 0.1 as well.
If I add diffraction grating after lens, by selecting order from -2 to2, the 3D layout is below, how to figure out the NA in image space? In the prescription data, it still shows 0.1.
Thanks for your help.
Best answer by Mark.Nicholson
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