I saw a TV show that had to do with the constant arms race between police and some drivers for new speed-determining devices and new devices to jam them.
I wasn’t paying much attention, but the show had something to do with jamming the new laser systems some police forces use to determine a car’s speed.
How do you jam a laser?
Doesn’t the laser beam just need to hit one small point on your car and give a return to the instrument? So wouldn’t the jammer need to send a signal from whichever point on the car the laser bounced off of in order to throw the receiver off?
Obviously I’m wrong, but if someone could help me figure out why, I’d appreciate it.
According to Car and Driver testing, just the hi-beam headlights will greatly reduce the effectiveness of the laser. They also tried a 100 watt lamp with an infra red pass filter, which cuts almost all visiable light and lets all the interference light thru. The laser could not find its signal with 100w off-road lamp + hi-beams until the car was extremely close to the gun, like 60 feet - been a few years since I read the article.
It works because the lasar gun can’t find its signal - like trying to see a candle in front of spot light. The plain lights on any car emit enough light in the frequency the laser operates to create interference.
C&D also said radar jammers do not work well at all!!!