zmespeed

i posted somthing about this a little while back but got no answers.

how many of you that have them have had false alarms. shouldnt laser not give a false alarm. mine has done it 4 times with'n two months.

Dr Bonz

iTrader: (1)

Laser will false if you are behind someone with those bright LED brake lights, especially the 3rd light higher up at the level of your detector. I've also seen my Valentine One false (at least my older model) when the road is very wet and the sun is out and there is water mist being sprayed up in front of me. The sun shining through it must act like a prism and cause it to false.

zmespeed

ya i was thinking it was somthing like that. some sort of lite refraction. thanks

RaDaRkInG

http://valentine1.com/lab/Previously7.asp

Red neon is occasionally used for the CHMSL (Center High Mounted Stop Lamp) on new cars. We know of these models: GM Trailblazer and Envoy, the Lincoln Mk VIII and the latest BMW 3-series convertible.

These lights use a neon-plasma light source. The red lens allows red visible light to pass, and also invisible energy near infrared. The source is powered by a pulsating voltage on a frequency that happens to be similar to the repetition rate of legitimate laser-gun pulse trains. In other words, the CHMSLs have an invisible energy leakage that’s nearly identical to the beam used by traffic laser. If we suppress the interference, we’re likely to damage laser sensitivity.

Another source of alarms: a few new cars have cruise controls that use laser to measure distance to the car ahead. This feature is available on the Lexus LS430, Infiniti FX35 and FX45. This, of course, is real laser, not a false alarm.

http://valentine1.com/FalseAlarms/

Some navigation screens will also set off laser detectors.