 Blinder M10 國際測試報告
受委託測試單位: Speed Measurement Laboratories, Ins (SML) |
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結論: 這套Blinder是我們SML (速度量測實驗室)測試至今最有效的雷射槍的對策方式, SML本身不鼓勵也不推廣這類的雷射產品, 但是對於這Blinder的技術上的優勢表示驚訝,這套產品使得雷射槍變的無用武之地了! |
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Date: 7 March 2000 |
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Product- BLINDER is a product of Denmark designed to prohibit 904 nanometer laser guns from obtaining a speed-reading of target vehicle. It consists of two transmitters and an in-cabin enunciator giving the driver notification of laser's use. The transmitters are mounted in the grill of vehicle with attention given to a level, horizontal placement. The BLINDER is powered by 12 VDC of the vehicle. It must be noted that Europe has the highest use of laser in the world per capita.
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Evaluation Mythology- The use of laser guns is different than radar guns. Radar guns use a microwave emission and determine speed by a Doppler shift in the frequency emitted by the radar gun and that return from a reflective target. Laser determines speed by the "flight time" of 904 nanometer pulses of laser gun to determine distance and time to target and the returned pulse. The laser gun's computer remembers each pulse emitted and waits until the pulse is return from a reflective target. Six laser guns, all with different pulse rates, were used in the field evaluation including, Kustom Pro Laser II, Kustom Pro Laser III, Stalker LZ-1, LT1 Ultralyte LR, Riegl and Laveg. (Riegl and Laveg are European guns) The BLINDER test vehicle war targeted at a 1000-foot cone to determine if the laser guns could get a distance/speed reading prior to the installation of BLINDER counter measure. Once satisfied all laser guns were able to determine distance7speed without the BLINDER installed with the laser guns aimed at the front license plate and the driver's headlight, the BLINDER was installed. Laser guns were operated by Steve Hocker and Jams Travis, both police officers and instructors in lasers use in the United states The test vehicle was mid-sized car, Dodge neon, white in color. Test conditions were dry with a relative humidity of 05 and temperature of 55° F. Laser guns were operated in accordance with procedures outlined by the International Association of Chiefs of Police and standard police operation instructions. The test vehicle with BLINDER installed was targeted a 1,000 feet, which is the normal targeting, distance of police laser guns, first aimed at the front license plate and then at the driver's headlight. The vehicle was driven toward the laser guns at 30 mph and 60 mph with the driver counting down "3,2,1" at the distance cone of 1,000 feet. When the test vehicle reached the 1,000 foot cone, the laser was fired. The test vehicle and laser source were in radio communication. Two runs with each laser gun were made. The test was then replicated with the aiming point changed to 600 feet and continuing changing aiming points of license plate to highlight. Aiming at the highlight is necessary, as seventeen states have only one rear plate. Laser's beam width diverges little. At 500 feet it is only 18 inches wide compares to radar's 109 feet. Choosing the aiming point of the headlight at 600 feet is important. Many other laser countermeasure device's attempts to jam laser at this distance have failed due the narrow nature of laser beam at such a close range. While these other devices have only one transmitter attached to license plate bracket, they have great difficult affecting laser's target ability when aimed at the headlight. In many years cases they don't even see the laser beam as the distance from the headlight to license plate mounting bracket is greater than 18 inches. BLINDER offers two transponders equally placed in the vehicle's grill providing complete frontal coverage. |
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