Hello everyone, I need your kindness help for some problems that I had. I try to make a system that use both sequential and non-sequential mode by mixing them. I use “How to model a mixed sequential/non-sequential system” as my reference from the zemax support.

My plan system is as Fig  below which mean that laser output and image is sequential mode, and BS, mirror as a non-sequential mode. The entry port is before BS and exit port is before image.

Unfortunately, I had a problem which is my reflected light from the mirror had gone into the BS again but why the light did not reflect to the image. I had attached my file below as reference. One of the file is only the system I made using non-sequential, and another one is the mixing of sequential and no- sequential.

Can someone correct my system or had another idea on how to fix it.

I really hope someone can teach me because I did not know whether there is some mistake, or I did not have enough knowledge about it. Thank you.