I have always used a video camera to assemble/adjust the crystal set underneath a metal cabinet. That way I can use the night vision mode and never have to take a chance of getting a shot if IR> It also helped a lot to use a tripod and separate viewing monitor. Just try not to get your camera with a direct shot if the IR is collimated! I know that the IR is going to be present if the driver is powered up , so I treat it like a loaded gun you wouldn't want to see. I would rather get a blinded camera than an eye! This is the safest way I have found....works for me.
You are the only one that can make your dreams come true....and the only one that can stop them...A.M. Dietrich