[HH] A CRT reimagined using a UV laser and phosphorescent paper

[Tom Metro]

I don't find hacks with lights and lasers all that interesting, but this
one has a few interesting points. Although not mentioned in the videos,
this project effectively emulates a cathode ray tube monitor: instead of
a scanning electron beam it uses a servo controlled UV laser; instead of
a phosphor coated glass tube, it uses phosphorescent paper (I didn't
know there was such a thing). It uses this technology to "print" Tweets
that fade out in a few seconds. Whatever.

The first video shows the results. The second shows the creator
explaining the tech.

http://www.engadget.com/2011/12/26/matt-richardson-turns-arduino-twitter-and-lasers-into-art-vide/

 -Tom