Making holograms with a pen plotter

dejobaan

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.

nomel

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?

asalahli

Steve Mould has a great video on youtube explaining how they work https://www.youtube.com/watch?v=sv-38lwV6vc

femto

It would be interesting to augment the plotter with a Unimorph piezoelectric disk scanner [1], to enable finer movement so lines can be drawn closer together. [1] https://john-alexander42.github.io/simple-stm-web-page/Disk_...

IshKebab

I've made these scratch holograms before with a compass. They're pretty fun, but very far from "real" holograms.

bacon_waffle

Chocolate is a good medium for holograms :)

6510

William Beaty had a video of the hands on the car hood. They showed up very detailed some 20 cm under the hood as if people captured inside. Quite the find.