If it were me designing a laser speed camera, I'd have it be a pulsed 1500 nm laser with a beam spread big enough to cover a car at 200 yards. You don't need to

If it were me designing a laser speed camera, I'd have it be a pulsed 1500 nm laser with a beam spread big enough to cover a car at 200 yards. You don't need to hit just the license plate to get a good return from it.