Re: TI-H: Re: Laser Network (OT)
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Re: TI-H: Re: Laser Network (OT)
quite a bit only starts to explain it have you ever been up in one? even
just at the fifth floor it would be almost impossible to keep a laser (or
anything else in that matter) aimed on a spicific object. also here in
Portland we have two families of periguins (wild) living in town! but
there's more of a problem of rain (a lot of it) here.
----- Original Message -----
???: "Olle Hedman" <oh@hem.passagen.se>
???: <ti-hardware@lists.ticalc.org>
????: Wednesday, March 29, 2000 01:36
??: Re: TI-H: Re: Laser Network (OT)
>
> You can't have it very high up in the skyscrapers though.. when the wind
blows,
> skyscrapers can move quite a lot I have heard.
>
> file://Olle
>
> Giles Pollock wrote:
> >
> > Maybe you could use a fat laser, to prevent rain from disrupting it and
i dont
> > know many birds that hang around the tops of skyscrapers here... use a
> > collecting mirror to concentrate the beam into a thin beam ath the
reciever
> > end... aiming the laser would be easy... use a second laser, a small
mirror
> > and some photodiodes to keep the system aimed, reflect the second beam
off the
> > mirror and back onto a series of photodiodes, if it went too far wide,
it
> > would shine on one of the other diodes and this could be used to trigger
a
> > servo motor or something... when it touched a center diode, it would
shut the
> > servo off... using a collector, it wouldnt matter about small
vibrations, only
> > about big ones... if you wanted to stop birds, have two lasers
transmitting
> > the same data at once, if a bird flew through one, the other one would
still
> > transmit... use a fat or very powerful laser and you could run the laser
> > around raindrops, or even vaporise them before they disrupted the data
> > transfer... they do focus the laser a bit, but not much...
>
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