RE: quattro-digest V3 #1010

[Paul Caneiro <PCaneiro@squareone.com>]

 Well here goes:

I have the V1 with the Laser detector and I frequently drive in Ct.
where they use Laser for enforcement of speed.  I also have mounted
behind my lower grill on my A4Q a single 5"round fog light with a
100watt h1 bulb.  I wired this to a relay and connected this to fog
light to the battery. Oh, I forgot, I covered this bad boy with a lens
that will only transmit light in the IR spectrum. Coincidentally this is
also the same spectrum that the laser guns work in.  

In total darkness you cannot tell the light is on.


 I have come up on laser traps (1/2 mile after cresting a hill) and had
my V1 go off and I have had plenty of time to slow down.  I have only
been pulled over once by a cop and told that me that his laser told him
it was being jammed and accused my V1 of being the culprit.  I asked him
why he would think this and he told me that when he shot my car the gun
emits a warbling tone to alert the operator of a possible jamming (and
also that it can not determine speed). I explained to him that this was
a rader detector and not a laser jammer.  He looked confused and told me
that it must have been due to the sun off of my black paint.  

He let me go!!!!!

I believe that this type of protection works because the output and
frequency of the light emitted from my light is more powerful then the
reflected pulses off of my car.  This prevents the Laser gun from
properly measuring the frequency of the pulses that are being reflected
off of the car back to the gun. kinda like laser overload.

In my cas the $100  was well spent on the detector and the $150 on my
project was also well worth it.

I hope this helps

Paul


>----------
>From: 	Psycho Bob[SMTP:honge@creighton.edu]
>Sent: 	Tuesday, September 10, 1996 10:10 PM
>To: 	Audi majordomo
>Subject: 	Re: quattro-digest V3 #1010
>
>> > (aka "lasers") speaking. The laser beam is highly focused and
>> > coherent, which means it does not scatter. At a distance of 1 km it
>
>If I puff and blow a sandstorm in laser beam's path, would it "scatter" to
>have laser detector detect it? It's different on theory and reality side
>of these techo thingmawhatthehells.
>
>> > may very well yield a spot of a few cm in dia. So, virtually no chance
>> > of getting a stray signal bounced off some letargic Roadmaster
>> > fearlessly doing 67 in a 65 mile zone in the fast lane in front of
>> > you.
>
>> I have to disagree with a lot of this Igor...I studied lasers a lot as 
>> well as working at Litton Laser w/ laser radar (military side).  They 
>> dont use high quality YAG's on these things, but the diffusion rate is 
>> high, a lot of speckle. Laser detectors dont require a direct hit to be 
>> triggered.
>
>Exactly. But the thing is that the laser detector has to be very
>sensitive. I don't think any current laser detector on the market has
>sensitive enough thing to detect "laser scatter." I think most mag tests
>involve direct shining of laser beam on those detectors. I don't recall
>any "offset" tests to see if these bunch can detect scattered laser.
>
>> > Also the light travels at 300000km/sec. What is your best reaction time?
>
>> About the same as radar...whats the difference?
>
>So is radar. But what do you say your probability of detecting one
>yourself but yet being undetected by the enemy? In the early days, they
>said radar detector is useless because once the detector goes off, you
>have been clocked...
>
>> > your car is black,
>> > your headlights are completely taped black,
>> > your windshield is completely taped black and 
>> > you don't have a front plate 
>
>> Thats like saying you can avoid radar if you rid your car of all metal, 
>> everything radar reflective, and use anti radar paint.
>
>From what the magazine tests said, it seems high-beams can dratically cut
>down the radar speed detector's sweep range (same idea as radar jammers
>-- interferance). Go to your nearst photo dealer and buy some red gel
>filters (something that will pass wavelength of 650nm or whatever
>offucir Bubb is using). And head out and buy some auxilary headlights (not
>amber, but just plain transparent). Cover the aux headlights with the gel
>filter so people won't complain about "your fog lights are on" -- at the
>same time, it should kill the laser speed detector's range.
>
>I wonder, do these laser speed detectors use real laser diode, or just
>plain red LED diode?
>
>------------- clip here with virtual scissors --------------
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