Evaluation Methodology: Blinder produces a laser countermeasure designed to produce no speed readings when it encounters police laser guns. Court president established by New Jersey Superior Court ruling of 1998, Judge Reginald Stanton, dictates laser may not be used for speed assessment at distances greater than 1,000 feet. Current police training programs also recommend no targeting past this distance as the divergence of the laser gun's 904 nanometer, 3 milliradian, beam would be greater than 36 inches producing a likelihood of erroneous speed readings from adjacent vehicles. All laser guns were operated by either Sgt. Araiza or Officer Linam. No speed assessment equipment, i.e. police radar and/or laser guns are ever operated by SML personnel eliminating any suggestions of testing bias. Both Sgt. Araiza and Officer Linam are certified laser operators. They were instructed to operate the laser guns as they do each day in issuing speeding tickets. The following police laser guns were used during the field evaluation: Kustom Pro Laser III, Stalker LZ-1, Laser Technologies Inc. Ultralyte LR 200, and Laser Atlanta Speed Laser.

Officers are trained to aim laser guns at front license plates as the plates provide an excellent retro-reflective surface. Laser needs a flat reflective surface to be effective and can not be aimed at windshields. In the absence of a front license plate, as is the case in seventeen states, officers aim the laser at the headlights of the target vehicle. As is the case with all SML field evaluations, only white mid-sized cars are used as target vehicles. This is the most difficult scenario for laser countermeasures as white is the most reflective color and easily targetable by laser compared to non-reflective black vehicles. Optical physics dictates white reflects all colors, while black absorbs all colors including police laser gun emissions.

Cones were placed on the test course at distances of 1,000 and 500 feet.  The test vehicle approached each cone at two different speeds, i.e. 30 mph and then 60 mph. This approximates laser being used in the city and then the highway J setting. Speed is important in defeating laser guns. The longer the laser beam remains on the target vehicle the greater chance of a speed reading. The slower 30 mph should yield more speed readings. All laser guns were operated in the constant tracking mode compared to the single shot mode. This is the typical operational methodology used by police agencies as the constant tracking mode shows fluctuations in target vehicle speeds and further substantiates the legality of "visual tracking history" which is necessary for thorough and legal speed assessment. The vehicle containing the Blinder approached each cone and counted down via a two way commercial radio when it arrived at each cone. The officer then fired the laser. There were two tries at each speed and each aiming point, i.e. first the license plate and then the passenger headlight. Laser guns were operated outside the base vehicle on the shoulder of the same lane as the test/target vehicle. The test vehicle was first targeted from the front and then from the rear going away from the laser guns. Rear targeting with police laser is rare. Combining front and rear aiming of all four laser guns, Blinder was exposed to 120 laser encounters. Blinder was also exposed to Laser Atlanta's Speed Laser set in the Stealth mode. This mode claims it can not be jammed. For field testing purposes Blinder's transponders were not concealed in the vehicle's front cowling or rear bumper assembly. This mounting neither enhanced nor diminished the normal placement performance. Blinder consists of two front and two rear mounted transponders. Under actual usage, Blinder's transponders would be concealed to avoid recognition. See picture at right for normal, concealed installation.

Results: One of the four laser guns inform the operator if the laser gun is being jammed. Stalker produce jamming codes of E-6 accordingly. However, these codes can be produced by other outside influences such as direct sun light and road mirages and are often ignored by operators. E 1 code means insufficient data. Jamming efficiency is reported in three forms, i.e. JTG meaning Jam To Gun, J meaning Jam, and N meaning no jamming occurred. JTG further means the laser countermeasure jammed the laser gun from the point of first encounter, 500 and 1000 foot cone, to the laser gun's position. J means countermeasure jammed the laser gun but uncloaked at some distance as is reported as J (210). The countermeasure jammed the laser gun but uncloaked at 210 feet. Note rear results reported as J or N as Blinder could not JTG going away from gun. Blinder notifies driver with in cabin speaker.