[Sort of OT] Laser Beam To Discourage Thieves

[heather james]

Here's the site I was referring to ...  http://www.wickedlasers.com/
While they are technically legal in the US, some of them do have eye
warnings ...
http://www.wickedlasers.com/products.php?content=advanced
 those are in 55 to 75 mw range ...

   -= )-( =-

On 1/19/06, James Sentman <james at sentman.com> wrote:
>
> On Jan 19, 2006, at 12:13 PM, heather james wrote:
>
> > Look out for that. If its the site I'm thinking of, they had high
> > power green lasers that were
> > 3 to  7 times the power of the regular laser pointer "toys" ... and
> > warned that they had the potential of eye damage.
> > Can't you just see some ambulance chaser coming after you because
> > their client suffered eye damage by staring at your building alarm for
> > too long ...
> >
> >     -=)-(eather=-
> >
>
>
> A real 5mw or so (perfectly legal if you dont point it at an
> airplane) can actually be seen as a beam in the dark. They are used
> as pointers to stars by astronomers. Ones that actually output that
> much power though are still very expensive though.
>
> They dont make the air fluoresce or anything like that, but your eye
> is so much more sensitive to that color than the red we're used to
> that it takes much less scattering to make it visible to you. It's
> not like in a room filled with fog, but you can definitely see it
> with dark adjusted eyes.
>
> If you leave the porch light on though it will be too bright in the
> yard to actually see the beam. Plus it's illegal to shine laser
> pointers at police or cars (in many places) and probably lots of
> other restrictions on their use. especially their public exibition
> which is what your random scanner might count as. The laws about
> laser shows are pretty intense, you have to have physical lock outs
> on your beam scanners to keep them from hitting the crowd or going up
> into the air above a certain power. And all sorts of things.
>
> Probably OK to do it for fun though :)
>   James
>
> >
> >
> >
> > On 1/19/06, Rob Lewis <rob at whidbey.com> wrote:
> >> I saw an ad for a green laser pointer that claimed you could see the
> >> beam in the air (IIRC, they were talking about the night sky, not a
> >> lit-up room).
> >>
> >> I'm highly dubious, but maybe the right wavelength can excite air
> >> molecules to re-emit or scatter visible light? Any physicists out
> >> there?
> >>
> >> On Jan 19, 2006, at 8:38 AM, Chester Lapeza wrote:
> >>
> >>> I found this link:
> >>> http://www.epanorama.net/documents/lights/lasercontrol.html
> >>>
> >>> But really, with a randomly moving laser beam, as cool as it
> >>> sounds, unless you're going to be flooding the room with mist or
> >>> smoke (something for the laser to light up and be seen), all you're
> >>> going to get is a red (or green!) dot moving along a wall or the
> >>> floor. ...or if you get it moving fast enough, a line or squiggly
> >>> smear, making your own laser show... then all you need is some
> >>> stoners and some Lynyrd Skynyrd!
> >>>
> >>> "Freebird!"
> >>>
> >>> Love the idea, tho!
> >>>
> >>> Chester
> >>>
> >>>
> >>> On Friday, January 20, 2006, at 01:42AM, Joe Sonne <joe at sonne.ca>
> >>> wrote:
> >>>
> >>>> Although there will be wireless sensors all over the place in
> >>>> the new
> >>>> front office of a building that we are setting up I thought that
> >>>> something like a randomly moving laser beam would be a good visual
> >>>> discourager for would be thieves. Can anyone point me in the
> >>>> direction of something that would do the trick? This can be
> >>>> along the
> >>>> lines of the 'Beware of Dog' sign when you don't really have a dog.
> >>>> Just something to make amateur thieves think twice before breaking
> >>>> in.
> >>>>
> >>>>
> >>
> >>
> >
> >
> > --
> >
> >             -= )-(eather =-
> >        =------------------------------=
> >         thewebgal at gmail.com
> >
> >  Heather's Photo Blog: http://www.thewebgal.com/blog/
> >  The Triumph Project:  http://www.hjames.net/my-bike.html
> >> ==========================================<
>
>


--

            -= )-(eather =-
       =------------------------------=
        thewebgal at gmail.com

 Heather's Photo Blog: http://www.thewebgal.com/blog/
 The Triumph Project:  http://www.hjames.net/my-bike.html
>==========================================<