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Non Radio covert communications

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Non Radio covert communications
20 August 2013, 08:42,
#3
Lightspeed Offline
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RE: Non Radio covert communications
(20 August 2013, 08:06)Highlander Wrote:
(20 August 2013, 07:59)Lightspeed Wrote: Employing a mini laser diode would allow the device to function in higher ambient light but is not really suitable as it'd be damaging to the viewers eyesight.

If this is a better idea, the laser could be read via a mirror onto paper

.... I think the idea is sound, but what advantage does it have over a good torch?

Advantage over a torch ( which ist is kind-of) is the much narrower projection angle.

This means more covert operation. Long fixed light tubes would make signalling possible only between very precise locations.

Maybe the laser image being reflected would work.... kind of like the way to look at the sun with a telescope, yes?
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Messages In This Thread
Non Radio covert communications - by Lightspeed - 20 August 2013, 07:59
RE: Non Radio covert communications - by Highlander - 20 August 2013, 08:06
RE: Non Radio covert communications - by Lightspeed - 20 August 2013, 08:42
RE: Non Radio covert communications - by bigpaul - 20 August 2013, 10:58
RE: Non Radio covert communications - by Lightspeed - 20 August 2013, 11:58
RE: Non Radio covert communications - by Prepper1 - 20 August 2013, 11:25
RE: Non Radio covert communications - by I-K-E - 20 August 2013, 14:01
RE: Non Radio covert communications - by Lightspeed - 20 August 2013, 14:20
RE: Non Radio covert communications - by Highlander - 20 August 2013, 14:50
RE: Non Radio covert communications - by Lightspeed - 20 August 2013, 14:55
RE: Non Radio covert communications - by Lightspeed - 20 August 2013, 17:41
RE: Non Radio covert communications - by Steve - 20 August 2013, 18:55
RE: Non Radio covert communications - by Lightspeed - 21 August 2013, 12:06
RE: Non Radio covert communications - by Lightspeed - 25 August 2013, 06:57
RE: Non Radio covert communications - by Highlander - 26 August 2013, 18:22
RE: Non Radio covert communications - by Jonas - 25 August 2013, 17:55
RE: Non Radio covert communications - by Lightspeed - 26 August 2013, 19:38
RE: Non Radio covert communications - by Mortblanc - 28 August 2013, 20:21
RE: Non Radio covert communications - by Lightspeed - 28 August 2013, 21:51
RE: Non Radio covert communications - by Mortblanc - 30 August 2013, 18:29
RE: Non Radio covert communications - by Midnitemo - 30 August 2013, 18:35
RE: Non Radio covert communications - by Midnitemo - 30 August 2013, 11:37
RE: Non Radio covert communications - by Lightspeed - 30 August 2013, 11:42

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