Why won't a laser/radar detector protect me from police laser?
Police laser operates differently than radar, which sends out
a pulse of electromagnetic (EM) energy, also referred
to as RF energy.
The radar beam starts out as a small diameter pulse,
but grows quite rapidly as distance increases from the
gun; such that at 1000 feet, the EM pulse is 300 feet
tall and 600 feet wide. If 6 vehicles were hit by the
RF energy (six vehicles driving down a 3 lane interstate),
6 pulses would come back to the radar gun, and the radar
gun would detect the largest signal of the 6 signals present.
Because a radar signal is so large traveling down the
road, a radar detector could be located nearly anyplace
around the vehicle, and it will detect the radar signal.
However, laser can only be detected at the point where
a laser gun is aimed. This is because a laser beam is
about 9” wide at 600 feet distance. If a laser gun
is aimed at the license plate, the beam is so small, none
of the laser signal would be detected up in the windshield.
Thus, a radar detector with laser detection installed
in the windshield would not even detect the laser beam
on the license plate (or headlights or bumper for that
matter). This means the beam of a laser gun can actually
target a single vehicle out of let’s say six vehicles
driving down the interstate. The laser gun can target
and detect that single vehicle in less than ½ second
after the trigger is pulled, while the surrounding vehicles
would not detect the laser beam as it passed right beside
their vehicle.
With radar, you will know it is present because the signal
is so large, it is detected by many people at one instant
in time. Laser, due to its targeting features, will target
you and nobody else for that period of time.
Once the trigger is pulled, the only defense to the laser
gun is to instantly jam the laser gun as it attempts to
target your vehicle speed. If your radar detector is alerting to laser, it's too late.
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