3 ms·

I can’t find much else on these. I wonder if the technique has been rediscovered as the “scratch hologram”: https://forum.lookingglassfactory.com/t/incredible

• MengerSponge 4y ago
  Probably not, although scratch holograms are really cool. It looks like it's a fundamentally different mechanism
  • ttoinou 4y ago
    Researching this, looks like it's called https://en.wikipedia.org/wiki/Specular_holography https://en.wikipedia.org/wiki/Specular_holography