Hello everybody, 

I am designing holographic elements using the optically fabricated hologram surface (OFH) in OpticStudio 2023, and I tried sharing my file with someone using OpticStudio 2025 and the behaviour of the surface in both version does not match.

In OpticStudio 2023 (which seems to work well), all of the rays are diffracted by the OFH surface, however in the 2025 version, only the central area of the OFH diffracts light, or only a line along the x-axis diffracts the rays. 

The stop size also keeps changing.

Does anybody have experience working with OFH in OpticStudio 2025 and could point me to obvious differences between the two versions? Or could anybody explain the difference in behaviour I am seeing?

Thanks a lot for your help,

Cheers,

P