So I made a cardboard-and-blutack prototype of the followspot reflex sight with heads-up display idea that I’ve been thinking of, with a very nice beamsplitter cube loaned from my makerspace friend. Too bad they’re quite expensive — might not be so practical to use one in the end (rather than a semi-silvered mirror), but they’re so nifty. #tinkering
@aearil the answer seems to be basically no, as some back of the envelope maths told us you need the interface layer to be on the order of single microns thick, with consistency down another OOM. It’s cleanroom territory afaict.
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