Limitations of IR LEDs

After being told that we can actually use handphone cameras to detect IR light, we tried it and found that with our current setup (IR lights aligned to the acrylic, but not shining into it using TIFR) the range of refracted light is very small, and even if we used LEDs all around the screen it would give us only a usable 10x10cm screen; not desirable.

We shall order more LEDs asap, and this coming week we will build some sort of stand for the screen, and begin to try different methods to use TIFR.