Re: [ST] Radar detectors...question

["Enrico" <enrico@xxxxxx>]

- -----Ursprüngliche Nachricht-----
Von: "Kevin Liske" <thxnc@xxxxxxxx>
An: <ST@xxxxxxxxxxxxxx>
Gesendet: Dienstag, 19. Februar 2002 19:44
Betreff: [ST] Radar detectors...question


>
>
> Maybe I haven't done enough homework and research to
> answer this question myself.  I understand that for
> radar, our bags and bodies are transparent.  But for
> the laser detection, I'm a little confused.  Are the
> lasers microwave (masers actually)?  Coherent light is
> still light and keeping a detector in a light opaque tankbag
> is not going to let it "see" the light.  So how does
> laser detection work?

A laser beam is directed to your bike. The laser is on for instance for 1
µsec pulstime. A sensor sees the reflected light pulse. Then another light
pulse is sent and the reflection will go back to the receiver. The time
difference between pulse #1 and #2 is measured and will give the speed of
the object.

It is in principle the same system for measuring a fault in a cable - but
there you will know the distance of the fault and for motorbikes they want
to know the speed...

BTW: most of this laser speed measuring systems are coming from a small
company in Austria which has patented the principle...

BTW2: if you will send laser pulses with undefined repeating frequency in
the same wavelength as the sender the measuring system will go crazy and
shows .... nothing!
So it is (in Austria) not allowed to send laserpulses.... *g*

Enrico
00 Sprint ST 'BlueBelle'
Vienna, Austria

>
> Kevin Liske
> '99 Sprint in Black
>
> Be careful with that, honey....we're using Technology!
>
>
>
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