Radar Detectors & Laser Guns
Sure this radar/laser detector might detect a laser gun when it's pointed at your car, but it will NOT give you enough warning to avoid getting a laser speeding ticket. Radar detectors are designed to be fitted to the windscreen of a car, but laser guns are aimed at your number plate.
This is a photo (below) of a soon to be retired "radar/laser detector". Radar is going out of fashion in favour of LIDAR as the best technology to measure vehicle speed. Police forces the world over are retiring their radar systems in favour of laser due to the science which means less challenged court cases and successful appeals.

Echo and Doppler Shift
Echo is something you experience all the time. If you shout into a well or a canyon, the echo comes back a moment later. The echo occurs because some of the sound waves in your shout reflect off of a surface (either the water at the bottom of the well or the canyon wall on the far side) and travel back to your ears.
The length of time between the moment you shout and the moment that you hear the echo is determined by the distance between you and the surface that creates the echo.
Doppler shift is also common. You probably experience it daily (often without realizing it). Doppler shift occurs when sound is generated by, or reflected off of, a moving object. Let's say there is a car coming toward you at 60 miles per hour (mph) and its horn is blaring.

Radar Gun used incorrectly from a bridge overpass.
Radar guns gives an officer the feeling that it can be aimed accurately, as in this photo. The radar gun even has sights, which are a little pointless considering the wide angle of the radar jet. The broad jet of radiation isn't narrow or vehicle specific. Shooting speed reading from a bridge as in this photo is NOT Legal as shown in the News in South Africa recently Dec 2009.
You will hear the horn playing one "note" as the car approaches, but when the car passes you the sound of the horn will suddenly shift to a lower note. It's the same horn making the same sound the whole time. The change you hear is caused by Doppler shift.
The pitch change (frequency shift) of the sound can be used to calculate the speed of the moving object. Echos can also be used in a similar way, using time delay as the main data source.
When a police radar shoots out a radar pulse, it echoes off of all sorts of objects -- metal fences, metal bridges, metal street signs and other cars. The easiest way to remove all of this sort of clutter is to filter it out the signals that are not Doppler-shifted.
A police radar looks only for Doppler-shifted signals,but because the radar beam is not tightly focused it can hit more than one vehicle. Care must be taken to avoid any reflection and other vehicles in the vicinity when using this type of speed measuring device.
Disadvantages:
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Radar guns and speed cameras are prone to interference and giving false readings due to reflections given off by metal objects in the arc of coverage. Electrical high voltage wires can also cause interference making radar useless near high voltage train lines and power transformers.
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Radar radiation can be dangerous to the operator causing bad headaches and even (anecdotally) cancer.
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Radar can't detect a single vehicle in busy traffic to the degree that LIDAR is capable of performing.
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Radar sends out a wide jet of radiation compared with focused laser light.
Vitronic Poliscan Laser Speed Camera

The New BLINDER software update April 2011 includes the ability to jam the new Vitronic PoliscanSpeed laser speed camera. This is great news for those motorist in Australia, Germany and USA who have paid a high price in speeding fines because of this high tech camera system.
The New BLINDER CPU's detects the Vitronic Laser Speed Camera from a distance of at least 120m to 200m in Western Australia and up to 400m in Germany. The Vitronic PoliscanSpeed camera is set at a 45 degree angle to the road which limits the laser beams arc of travel. This means that laser detectors might not be good enough without BLINDER jamming capability. This new laser speed camera can pick your vehicle out in heavy traffic by scanning the road area 100 times every second. It could in fact paint a picture of the scene just using laser reflections alone.
"Shooting Ducks in a Barrel" was never so easy for the police. You can kiss your money good-bye, unless you install a BLINDER hidden laser detector.
As new Police Laser Guns and Speed Cameras come into use in Australia and New Zealand you can be sure that your BLINDER will stay current. All you need to do is download the updated software patch and using a desk-top computer or laptop, upgrade the CPU firmware so that it can recognise the laser signature of the new device. This in effect "future proofs" you BLINDER against expensive upgrades that you may need for other brands of jammer.
Scanning laser speed cameras can cover multiple lanes of traffic and are not hindered by refections compared to radar speed devices.
All firmware upgrades are free with your BLINDER System. BLINDER International work quickly to bring new jamming algorithms to market so that you remain ahead of the game.
New combined laser speed camera & red light camera systems are soon to be used at major traffic intersections in Australia. BLINDER upgrade firmware now released detects the VITRONIC PoliscanSpeed camera from a distance of 120m in Australian tests and 400m in tests carried out in Germany
Using The BLINDER Correctly (Note: The software in the BLINDER allows you to preset automatic shut-off time limits.)
Never jam a police officer all the way to the gun. It isn't necessary. When you hear the alarm, slow down to the speed limit and then turn off the jammer. Once you turn off the jammer the officer will instantly get a reading. He will then see you're driving at the posted speed limit. No suspicion will arise if you use a laser jammer correctly. |