Not sure this has ever been posted here (did a quick search), but a group of researchers modified the reflected OFM to make a MOKE Microscope. Thought I would post here so it is within the ‘application’ list of usage for OFM.
The modified section they added in order to hold the electromagnet are in the supplied data files.
Uebo K, Shiokawa Y, Takahashi R et al. Development of a magneto-optical Kerr microscope using a 3D printer [version 2; peer review: 1 approved, 1 not approved]. F1000Research 2024, 12:860 (https://doi.org/10.12688/f1000research.133292.2)