Hi,

I have looked at your file and made the following modifications for the respective configurations.

Configuration 1 - Transmitted beam

• Surface 8 had a Thickness of 0. Therefore Surface 10 (45-deg surface) was at the same location but tilted. I made Surface 8 Thickness to 5.0.
• Both tilted Surfaces were in the wrong orientation. I changed the Tilt About X in Coordinate Break 3 and 9 from -45 to 45. I also had to change the corresponding return Coordinate Break (5 and 11) to -45 instead of 45 because the Pick-up solve wasn’t there anymore.

Configuration 2 - Reflected beam

I’m not sure what you did here, after the beam is reflected, and transmitted to the detector, you have it propagate backwards to try and reach a second detector. I think that’s what is causing the issue. In Sequential mode, whenever you split the beam, you almost inevitably have to make a new configuration. Similar to what you did for the very first cube. And if the paths are not symmetrical, it can become a bit tedious. In general, I’d recommend modelling one path at a time, but I went ahead and tried to make something similar to your figure (file attached to my answer).

I see that you are still missing one beam from your figure. I leave it to you as an exercise. You’ll have to create yet another configuration. It Should be fairly similar to Configuration 1 except there’s a reflection at the cube. As a cosmetic improvement it might be necessary to go in the Surface properties and in the Draw tab tick Skip Rays To This Surface (I had to do it for the green path).

I hope this helps, good luck, and take care,

David

I got it to work! Thank you so much! Now i just need to add the apetures in! :)
 

I have a similar problem. I am using non-sequential mode. I looked at the answers above. I need to use non-sequential mode, so the sequential mode answer is not relevant.

For may case I have created a single cube beamsplitter polygon object, which I will attach, rather than using two 45 degree prisms. (I originally used 2 prisms, but I choose a single cube as a cleaner solution and becuz the coatings on the 2touching surfaces seam to interact with each other.

To test this, I created a very simple mode: source, cube beamsplitter, detector. No matter which coating I select, it always reflects. Never transmits, never splits.

The Zemax file and the .pob file are in the attached .zip file

Hi Carey,

You cannot have interior faces on POB files. The case of how to do a beam splitter is discussed in the documentation, see the section I have highlighted below

https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/Zemax/v242/en/OpticStudio_User_Guide/OpticStudio_Help/topics/Polygon_Object.html

Also, I think you are using the AR coating, which is not the correct one (but this is not the reason for your problem)

Best regards,