Laser Speed Guns (LIDAR) make target identification more certain even in very heavy traffic conditions. This is a statioary format: there is no moving laser that can be used in a cruising patrol car.
from the original 1991 Laser
Speed Gun - the LTI 20-20.
The Ultralyte was the first
model to operate on batteries
(C-cells) in the unit rather
than from an external battery
pack or lighter socket.
Like all Laser Speed Guns,
the LTI must be held very
steady to obtain a speed reading.
This is why a speed reading
often takes much longer than
a second after the trigger
The Ultralyte is now used
in Queensland, Western Australia,
Tasmania, South Australia,
the Australian Capitol Territory
and the Northern Territory.
The Kustom Pro 3 is the latest variant of the
original Kustom Signals Laser
Speed Gun first seen in the
mid 90's. It is battery operated
(internally) unlike the earlier
versions that needed an external
Several models of the Kustom
Pro Laser Speed Guns are used
in New South Wales, Victoria
& South Australia. The
older designs are expected
to be eventually replaced
by the Pro 3 models.
- Pro Laser 3
How LIDAR works:
Laser Speed Guns emit a very narrow, intense
beam of "invisible" light. The speed of
light is a known constant (approximately
300,000 Km per second). Therefore, the laser
speed gun calculates distance by measuring
the length of time it takes for the beam
to travel to a target and back to the gun.
Many such readings are taken over a brief
period of time to determine how fast a vehicle
is traveling. The speed reading "can" be accurate under "ideal" conditions.
It is "claimed" that the narrow beam makes
target verification more certain than with
radar. The Lasers used by enforcement authorities
in Australia are made in the USA by Kustom
or LTI and operate on a frequency of 904
nanometers. In the states and territories
of Australia, Laser Speed Guns have replaced
most hand-held radar guns for stationary
Advantages and limitations of Laser Speed Guns:
narrow beam (less than 1 meter at 300
meter from the laser gun) makes target
identification more certain than radar
under some conditions.
by Laser Detectors is very difficult.
car headlights and driving lights reduce
the range of the Laser Speed Guns.
errors can produce incorrect speed readings.
Because light is refracted differently
by hot air than cooler air, a spot of
air rising from the roadway can confuse
beams can be affected by atmospheric conditions.
Speed reading range is reduced on cloudy
or foggy days.
the laser beam bounces off more than one
solid object (stationary or moving) reflection
errors occur, producing an incorrect speed