Optical Rail System with Y-stage - Kvartal

This is an optical rail system based on the curtain slide holder "Kvartal" by IKEA.
I was in need of a quick to make but not necessarily very precise optical setup to measure transmission on different addressable points on a standing microscope slide.
The files are:
Holder for collimating lenses for fiberoptics.
A Y-Stage that can be adjusted.
A sample holder with slits for the microscope slide.

I don't expect these particular components to be extremely useful to anyone else but I might add others later.