Would it be possible to disable IR totally on the camera and use an external IR light? Something like this one, so you can adjust the beam. http://www.ebay.com/itm/111722615701?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT&rmvSB=true
Being able to narrow the angle might, as this type of source supposedly allows, solve the problem. Good thought. sadly I can't disable the IR from my software, so either way I am disconnecting the LEDs on the board. But you may be on to something.