According to some posts published on the nuigroup, if you want to illuminate the PMMA plate directly from the side, you have to use enlightened PMMA and also use some silicon rubber on top of it. This seems a bit complicated for a prototype… Also it appears that the silicon rubber tends to “blend” the LCD images …
So, it is now time to move to another technique: Laser-LP. This is basically the same process as the FTIR process apart from the fact that IR-lasers are used instead of IR-LEDs. Also PMMA is not needed anymore. Any transparent material will work as lasers beam is generated over it.
I ordered 4 lazers from aixiz along with 4 88 degree line lens about two weeks ago and receive them today. Now I need to build a suitable power supply for at least 2 lasers. More to come soon …
