In the interest of some preliminary investigations into video tracking IR LED markers in the darkened theater environment, I opened up a Logitech c160 webcam and replaced the infrared filter with a couple of layers of exposed colour negative film. It really only took the removal of three screws, a little easing apart and cracking out of the old filter and super gluing the new ones in place. As a test here are a couple of images taken with the modded camera.
The Camera can see the IR LEDs for some distance (as far as I could get the two apart in the studio) with some more methodical testing coming soon.