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Laser Messaging
Not to be confused with "laser massaging", which is either ineffectual or painful | |
On covert spy or military missions,
yelling to companions is often out of the
question, and radios can be picked up
on.
pigeons can be shot down, the tin cans
with string are too conspicuous, fax
machines are unweildy, messages written
on paper airplanes can be difficult to aim
and easy
to intercept and bird noises are
not always appropriate, as there may or
may not be birds in the area.
Take a non-this-incinerates-stuff laser
that illuminates an area about the size of
a
quarter, and make a series of slides to go
over the end. different symbols can mean
"go back" or "my platoon has been shot"
or
"there is a horde of huns on elephants
behind you". Then, if you can see your
contact, from however far away, you can
send them a message. receivers could
carry table tennis paddle type things for
easier veiwing. Morse code could be
used.
This would be more covert than just
using
a flashlight, because the laser will only
shine on an area the size of a quarter,
and
the initial light will be harder to see. Not
recommended for steamy/smoky locales.
laser graphics, animation, billboards
http://www.n-effect.com/2lasers.html
[dentworth, Oct 05 2004]
IR voice modulated laser transmitter and receivers
http://www.amazing1.com/laser2.htm
Reasonably priced, even. [bristolz, Oct 05 2004]
Visible spectrum modulated laser
http://www.boreal.c...m?categoryid=271292
[bristolz, Oct 05 2004]
In depth look at 300+Ghz communication band (including light)
http://www.n1bug.ne...ser/alc_wa6ejo.html
[bristolz, Oct 05 2004]
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Annotation:
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//steamy/smoky locales// or nightclubs |
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the technology isn't far away from this is it. |
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How big can you make a laser pointer? |
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Not so different from a shutter light then, except:
a) the transmitter will have to know *exactly* where the receiver is, and
b) the receiver will have to know *exactly* where the transmitter is. |
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It'll have to be a not - quite - powerful - enough - to - blind - you laser, too. |
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Yeah, targeting makes this impractical. Although, anything with lasers is fun - sharks with lasers on their heads, for example. |
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Just send voice/text/code messages over a modulated IR laser. It'd be invisible. You would have to have a way to aim with some precision, though. |
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<off topic> not really the place to say but Tuck does seem to be exhibiting Troll behaviour.</off topic> |
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Arent lazers (pedants i know the spelling is laser but i feel Z is under used) used for comunications all ready? i can see a more practical system using a central target and either sending a message to a mobile or a pager. |
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the problem is sending lasers through
things without burning holes in them.
Unless there was a ridiculously
complicated mirror system. |
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What do you mean by troll? Is he
hanging out under bridges and
shishkebabing hobbits? |
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Stasi used this in the former East Germany for years. Absolute secure transmissions. |
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