Underwater IR Webcam

So Connor and I set out to waterproof a webcam the other day...

We decided to just coat the whole thing in a thick layer of silicone, this basically is just a test for a future project we plan on doing.

It worked out fairly well, though no long term underwater testing has been done yet...



Here, our beautiful workspace:

After coating it with silicone we got this wierd artifact (the semi-circle in the top right corner). If anyone could shed any light on why this appeard, I'd love to hear it:

The "finished" IR underwater Webcam: