A paraxial image solve is needed, to add a surface to the end of a prescription (or modify the thickness of the final surface?) which sets the back focus to the paraxial image location.
In the infinite object case, this just means tracing a ray from P=[1e-5,1e-5,arbitrary] and S=[0,0,1] through the system. For finite objects, #70 must be completed first
A paraxial image solve is needed, to add a surface to the end of a prescription (or modify the thickness of the final surface?) which sets the back focus to the paraxial image location.
In the infinite object case, this just means tracing a ray from
P=[1e-5,1e-5,arbitrary]andS=[0,0,1]through the system. For finite objects, #70 must be completed first