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A highschool lens-and-prism set is like 30-40 bucks on aliexpress, including a triple laserpointer. Not quite an optics table, but I’m assuming you don’t do your tabletop gaming with orange goggles and/or actual half-molten minis?
I plan on counting fringes to evaluate distances for my 40K sessions.
And yes, we use a welding laser to stimulate radiation damage.