Hi,

Are you able to share your file? It could be a problem with how you’ve setup the beam-splitter cube. Someone else had a similar issue not so long ago:

Perhaps this can give you an idea as well.

Take care,

David

Hello! Thank you very much. Below I have attached the ZIP file. I will take a look at the thread you sent.

Hii…

If you analyse your desing in transmission direction it is working fine!

For refelction through beam splitter interface you are using a mirror surface.

By adding a mirror surface in zemax the Radius of curvatures(ROC) and thickness will change their sign (parity),  as system is now in mirror space (n = -1). 

Sincce Beam splitter contains mirror surface for reflection. You need to change the parity of thickness and ROC of lens (in general to all surfaces which will come after mirror surface) in your 2nd configuration using MC editor.

Thanks.

Thank you a tremendous amount! This certainly helped clarify how some tools work, in addition to it answering my question!