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Laser detector jammers are about to supercede radar detectors in a big way as the main method of deffence against a speeding ticket. With the rise in popularity and decrease in cost of laser speed measuring systems, radar detectors will soon become a costly hood ornament. Only a jamming detector will be able to give you enough time to react and slow down!
With advances in speed detection, there have also been advances in laser detectors. The BLINDER laser detector/jammers use powerful sensors that can detect the use of laser guns far off in the distance. Within a few milliseconds BLINDER can identify the incoming signal, the number of pulses per second and identify through the use of a lookup table the correct counter signal, sending back a mimicking laser signal designed to confuse and nullify any speed reading
How do Laser Detectors Work?
Laser At The Speed of Light
Well most people don't know that speed detection technology has moved on in leaps and bounds over the past 25 years to where it is today. Laser is the new kid on the block and it is a powerful tool for law enforcement. Laser guns right out of "Star Wars" are now being used by Police the world over to enforce the speed limits.Laser At The Speed of Light
A laser speed gun measures the round-trip time for light to reach a car and reflect back. Light from a laser speed gun moves a lot faster than sound -- about 984,000,000 feet per second (300,000,000 meters). A laser speed gun shoots a very short burst of infrared laser light and then waits for it to reflect off the vehicle. The gun counts the number of nanoseconds it takes for the round trip, and by dividing by 2 it can calculate the distance to the car.
If the gun takes 1,000 samples per second, it can compare the change in distance between samples and calculate the speed of the car. By taking several hundred samples over the course of a third of a second or so, the accuracy can be very high.
The advantage of a laser speed gun (for the police anyway) is that the size of the "cone" of light that the gun emits is very small, even at a range like 1,000 feet (300 meters). The cone at this distance might be 3 feet (1 meter) in diameter. This allows the gun to target a specific vehicle. A laser speed gun is also very accurate. The disadvantage is that the officer has to aim a laser speed gun -- normal police radar with a broad radar beam can detect doppler shift without aiming.
Laser "coalescent light" is unlike normal light because it doesn't spread out in all directions. A laser beam 5mm wide sent from the earth to the moon will only spread a foot or so by the time it reaches the moon. LIDAR speed guns and speed cameras aren't that good, but the spread is rather small as mentioned above.
- The speed reading "can" be much more accurate under "ideal" conditions. It is "claimed" that the narrow beam makes target verification more certain than with radar.
- Laser systems that scan the target area can identify target vehicles and map the area almost as well as a black & white photo. The Lasers used by enforcement authorities in Australia operate on a frequency of 904 nanometers.
- Laser can obtain an accurate speed reading over much greater distances in normal traffic compared to radar.
Disadvantages:
- The officer has to aim a laser speed gun. With radar on the other hand, aiming isn't that critical.
- Without a tripod the device can be difficult to aim over long distances.
- "Side Slip" (shooting down the side of the car) can give false speed readings. Usually fixed by the use of a tripod.
There is little point to using a laser jammer if the moment your jammer is activated, it causes a "Gun Being Actively Jammed" response on the Police Laser Speed Gun. For sure if this happened you would be stopped. Some Laser Jammers do cause Jamming Codes to appear on the Police Laser Gun. However, with the BLINDER M27 & M47 X-TREME you can drive with confidence knowing that this will not occur.
Independant testing of BLINDER defeating the most difficult laser gun, Laser Stalker LZ-1 with JTG, Jam to Gun, performance;
Part two shows how small the laser beam is and how difficult it would be for a windshield mounted radar detector to even alert to a laser beam!
How is this possible? I here you ask. Well the BLINDER mimics the same signal that is put out by the laser gun. This is no small feat considering that the BLINDER must detect the laser signal and then compute an exact response in less that a few milliseconds.The Laser Gun then becomes convinced that there is no target vehicle. Naturally, it might become a little suspicious if the laser gun signal was jammed for more than a few seconds, so you can either reduce speed and turn off the BLINDER or have the unit deactivate automatically after a few seconds. (These settings can be adjusted with the use of the BLINDER Software and a computer.)
As new Police Laser Guns and Speed Cameras come into use in the USA, 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.
SPECIAL NOTE - BLINDER systems are built to jam police laser guns and laser speed cameras. However you do need to be intelligent about the way you use your laser jammer. If you're targeted by a police officer the buzzer inside the car will alert. Slow down, drop to the posted speed limit, and then shut off the jammer.
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 favor of LIDAR as the best technology to measure vehicle speed. Police forces the world over are retiring their radar systems in favor of laser due to the science which means less challenged court cases and successful appeals.
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.
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:
- 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.
- Radar radiation can be dangerous to the operator causing bad headaches and even (anecdotally) cancer.
- Radar can't detect a single vehicle in busy traffic to the degree that LIDAR is capable of performing.
- Radar sends out a wide jet of radiation compared with focused laser light.
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