Filter
Top Products
Laser
The Laser Speed Detection System, also called LIDAR (for
Light Detection and Ranging), uses a laser gun that emits
infrared light pulses just outside the spectrum of visible light.
Each reflected pulse measures the speed of the object coming
toward, or going away from, the laser gun.
Unlike radar, the laser gun emits a very narrow beam of light, so
it can pinpoint a speeding car within traffic. The infrared beam
spreads out, but slowly and over a longer distance than a radar
signal.
The laser gun can acquire a speed reading as quickly as 0.3
seconds, sometimes less. However, since it isn’t easy to
accurately aim at and hit a moving target, an operator often
moves the laser gun in several directions to get a reading. So
laser signals are emitted continuously for a few seconds for each
speed measurement. The GPSRD can detect these light pulses
from as far away as 1.55 miles, which is about four times the
effective range of a laser gun (0.39 miles), and about ten times
its average operating range (0.09-0.16 miles).
Note: To be safe, do not ignore any warnings. Although
there are other types of radar signals that may cause
interference, when the GPSRD detects a signal, be on
the alert. It is important to exercise caution at all
times.
0.25 miles
0.5 miles
1.55 miles
4.9 feet wide 9.8 feet wide 29.5 feet wide
5
US076Z (GPSRD) OM 9/4/01 13:38 Page 5