cross-posted from: https://lemm.ee/post/44155947
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“It would be” so you haven’t done this but speak confidently about it being cheap and accessible?
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You can purchase laser pointers with grid diffraction grating right now with zero effort to DIY.
You can purchase house decoration style diffraction gratings which are a larger format but are intensely bright. They are however less portable.
You can follow a thought emporiums instructions on how to create diffraction gratings, which includes the software and the process,
And yes, I already own a 300 milliwatt laser with a diffraction pattern that would work for this.
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