Hi all,

I have a question of correctly converting polarization state in Zemax non-sequential mode. We know that a wire grid polarizor (WGP) usually transmit p-polarized light while reflect s-polarized light, so as the attached picture shown below, when a p-polarized light (blue color) hit WGP, it can successfully transimit thourgh it, and hit a quarter wave plate (QWP), this QWP will convert that incident beam into right-circuarly polarized light (RCP), and hit the mirror, the mirror will covert it to left-circuarly polarized light (LCP), and go through the same QWP again, but now, that QWP should convert it to S-polarized light, which means afterwards, it is supposed to be reflected by that WGP, however, from the model shown below (the blue beam), it just passes through the WGP, which makes no sense to me. The zemax file is also attached below.

I really appreciate it if anyone has some insight about that issue! Thank you!