Radar Detectors & Lasers
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Laser Speed-Guns
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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.
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  LTI - Ultralyte
The LTI Ultralyte evolved 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 is pulled.

The Ultralyte is now used in Queensland, Western Australia, Tasmania, South Australia, the Australian Capitol Territory and the Northern Territory.
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LTI Ultralyte
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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 battery pack.

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.
Kustom - Pro Laser 3  
Kustom - Pro Laser 3
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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 "point-and-shoot" traps.
Advantages and limitations of Laser Speed Guns:
  • The narrow beam (less than 1 meter at 300 meter from the laser gun) makes target identification more certain than radar under some conditions.
  • Detection by Laser Detectors is very difficult.
  • Halogen car headlights and driving lights reduce the range of the Laser Speed Guns.
  • Refraction 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 the laser.
  • Laser beams can be affected by atmospheric conditions. Speed reading range is reduced on cloudy or foggy days.
  • When the laser beam bounces off more than one solid object (stationary or moving) reflection errors occur, producing an incorrect speed reading.
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