Hello David,

To design the real Fresnel lens one needs to use “Fresnel 1” in Non-sequential mode. But I have no idea on how to calculate the following parameters for Fresnel 1 using Merit function

a)Pitch

b)Radius

c)coeff r^2, Coeffr^4 and so on. 

I calculated these parameters easily in sequential mode. But in Non-sequential mode I dont know which parameter in optimization tab controls it. The below image is for reference.

Does anybody know how to calculate it?

Edit: This post has been moved into its own discussion topic. This was previously posted as a reply here: Which operand I can use to fix focal length while optimizing lens in non-sequential mode? | Zemax Community