A similar system can be used for laser doppler speed guns. I used to run a single great big offroad light, on all the time, with the infrared pass filter. This will confuse the laser detector long enough for you to spot the cop with the gun and slow down, especially if you have a laser detector. I always wondered if you could do the same with a big infrared led display on the front of the truck. Guess you'd have to know the laser gun freq, but that's just an FOI request away.
Never heard of a laser doppler speed gun. It's been a few years for me, but doppler is in reference to the radar and I know those are pretty easy to confuse. Heck, they pick up misc. emissions just sitting in the car. The engine or heater fan for example, will sometimes make it activate. The doppler part is the sound that the radar gun makes as the target approaches the gun and this how the Officer is suppose to distinquish different vehicles and whether or not the reading is from an actual moving target or something else.
But if you're going fast enough or your vehicle is large enough, unless you're really putting out a strong scrambler, the radar will still likely pick up the vehicle.
Laser is entirely different from radar and the Officer usually has a scope/gun type site and aims directly at a specific target vehicle and usually aims at a point on the vehicle that is particular reflective, such as a front license plate. The beam is so narrow and target so specific, that I've never understood the point of the laser detectors. By the time the detector picks it up, the entire vehicle is already been read.
I imagine there are ways to defeat laser as well. Making the front of the vehicle "stealth" or at least non-reflective to laser as possible would probably help.
I'm not sure how the infared light works, but it sounds interesting. Not that I need any of that stuff.
