Just do what I did: Drill a hole in your 5mW green laser where the pot is, and accidentaly miss and go in too far. If you hit the right spot, your laser will no longer put out green. Instead, it will put out more IR than there was green! It will be very divergent, though. About the size of my fist ~10' away. (If you're wondering how this happened, my laser was breaking and it was getting really weak, so I thought I'd pot mod it to get it up to it's origanal power for a while. Well, the top wouldn't come off, so I drilled a hole over the pot only to miss, and I now have an IR laser. :-/) I'm still trying to find a lens to focus the IR...