If you want a quick homemade hack & don't want to spend some bucks n buy an Infrared webcamera like the Kinemax infrared webcamera then here's an easy way to convert your existing webcam into an infrared camera and take videos & stills in nightvision mode. The process is not very complicated but it does require a little bittle of disassembly.

A great idea for some neat shots, like the rainbow in the picture above, which is barely visible in the normal camera mode but appears as a big bright line with the IR modification.