redwyre

I spent some time playing around with a piece of normal glass, but it turns out that normal glass almost totally blocks near infra-red light! You can clearly see it’s green when viewed side on. However, it is possible to get almost perfectly clear glass that is clear side on. I got a small 8mm piece and tried it.. it works fantastic!

Here’s the setup, I’ve got the leds aimed into the glass, and a bit of foam blocks light leaking underneith the glass.

With a bit of card covering the LEDs so all the lights going into the glass.

Touching it with my fingers, it works!

This entry was posted on Wednesday, September 12th, 2007 at 1:44 pm and is filed under surface computing. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.