Refletion microscope without beam splitter

[j.stirling]

What is the length scale you are trying to look at. If you are looking at larger structures (mm or so) this may be something where the field dissection microscope (a very much less polished project) may be of use:

First prototype of the Field Dissection Microscope is ready to build

Hello everyone Earlier in the year I started crowd funding to design a new microscope in the OpenFlexure Family. Later in the thread I provided an update with some images from the microscope The microscope has now reached the stage where it is documented and ready for others to replicate. You can find the complete assembly instructions on GitLab. Happy microscope building