71 pointsby DemiGuru3 hours ago3 comments
  • dejobaan3 hours ago
    This is "old Internet" style fun territory (along the same lines as the Tom7 fun, if not quite as deep). I felt that the olive oil + fingerprint + phone screen was a really nice way to illustrate the core concept. Especially clever because it used something common and annoying to help describe how the plotter does its thing.
    • TacticalCoder3 hours ago
      There are very few TFAs I upvotes before opening TFA. But with such a title, this is one of them...
  • nomel3 hours ago
    Related, "abrasion holography", with great good success for being hand drawn: http://amasci.com/amateur/holo1.html (1995)

    Maybe could swap out the pen for a needle?

    • evilduck2 hours ago
      Something tells me you didn't open the posted link.
    • bradrn2 hours ago
      In fact, I believe that the article is describing a reinvention of this technique! Just with a plotter on oil rather than a compass on plastic.
  • asalahlian hour ago
    Steve Mould has a great video on youtube explaining how they work https://www.youtube.com/watch?v=sv-38lwV6vc