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.

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Finally got around to wiring up the circuit for the first string of LEDs.  Here’s a first test with the modded web-cam:

I tried beaming it into a piece of glass to test FTIR, but it didn’t seem to work… I’ll have to see if I can get a piece of perspex to try it with.