Comments on: Infrared Light Blocking Foil Test for FTIR Multi-Touch Tables

By: Nat

Nat — Fri, 13 Nov 2009 03:51:06 +0000

I will definately try it !
The roll-on technique works very well and has the advantage of being very easy to do !
I just need to find some in Canada…

By: johannes

johannes — Mon, 09 Nov 2009 13:07:26 +0000

well, i haven’t tried the roll-on technique but i doubt that it is as regular as applying the silicone directly onto the acrylic glass. but maybe it does work well.

if you try out the roll on technique with infrared blocking foil i will be happy to hear some results from you!

By: Nat

Nat — Sun, 08 Nov 2009 19:36:40 +0000

Hi Johannes, here’s the basic method :
http://nuigroup.com/forums/viewthread/2383/

My version is a bit more simple :
The diffuser is a mylar sheet (plastic drafting paper) I lay it down on a table, I put some window-sealant silicon and roll it on the surface with a foam-roller. I apply 2-3 coats and it’s good to go. Since with your method the silicon is between the IR-Foil and diffuser, I assume we would need to roll the silicon on the foil, the question is, will it adhere to it ?

By: johannes

johannes — Fri, 06 Nov 2009 08:27:49 +0000

hi nat,
i haven’t coped with the roll on method yet. could you post a link to that method in order that i could check if that possibly could work on the foil?

cheers

By: Nat

Nat — Fri, 06 Nov 2009 03:29:58 +0000

Hi Johannes, interesting. I wondering if this could work with the sillicon roll-on method ? Could you roll silicon on the foil ?

By: johannes

johannes — Thu, 05 Nov 2009 08:34:38 +0000

hi nat,
no, the blocking foil goes between silicone and the diffuser/projection foil. on top the blocking foil would be smudged VERY quickly with fingerprints. I’ve updated the post at the end with the foil setup.

cheers

By: Nat

Nat — Thu, 05 Nov 2009 00:34:05 +0000

That’s very interesting, I assume the IR foil goes on top, is that the surface you touch ? If so, how’s the texture like ?