I’m currently modelling an imaging system in sequential mode and want to check the effect of a beamsplitter quoted with a lambda/4 surface flatness and lambda wavefront error. As an approximation, is there a simple way to introduce the wavefront error at a dummy surface used to represent the beamsplitter?
If I wanted to more accurately account for the surface flatness in reflection, would I need to use non-sequential mode? And how would I incorporate this property into the surface in that case?
Thanks!