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Hey, you pointing that at me.....
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Joined: 23 March 2010
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Points: 2166 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rog Quote  Post ReplyReply Direct Link To This Post Topic: Hey, you pointing that at me.....
    Posted: 09 April 2009 at 5:56am
 
 
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Points: 1003 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Silas )))))) Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 7:38am
Yer caught the end of that report yesterday, what exactly where they picking up on - just the laser? a prison sentance sounds a bit harsh for shining a small laser 
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Points: 2582 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 10:34am
UK is turning into a police state , looking from here...
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Points: 8806 		Post Options Post Options   Thanks (0) Thanks(0)   Quote norty303 Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 1:44pm
To be fair, lots of other countries have much tougher penalty systems in place for this sort of thing already.
 
However, at those sorts of ranges, most laser pointers are not powerful enough, or have a tight enough divergence to do proper damage, esp after passing through cockpit glass.  the risk is very much from distraction than anything else
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Points: 1683 		Post Options Post Options   Thanks (0) Thanks(0)   Quote subbass Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 2:41pm
Just to make this clear - these arent the little 'laserpens' they're using, more like high powered lasers off http://www.wickedlasers.com/ that are able to burn stuff 0.o
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Points: 1817 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tomschute Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 2:46pm
they were saying on the radio program that they "catch the beam", analyse the lasers individual frequency and therefore trace the owner / pin it on a person... is this possible, really?
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Points: 1683 		Post Options Post Options   Thanks (0) Thanks(0)   Quote subbass Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 3:11pm
While they can analyse the frequency / wavelength of the beam with their thing they would then need to get the suspects laser and test the frequency of that as well. There is no 'register' of laser owners in the uk. Precise matching of different laser diodes is possible though, each one almost has a 'fingerprint' of the different wavelengths of light it gives out..

Edited by subbass - 09 April 2009 at 3:12pm
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Points: 7801 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mk2_ginger_biscuit69 Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 3:45pm
yeah, they can take the signiture of the specific light, take whatever they may find on suspects and then use it as evidence in court. I highly doubt anyone will get imprisoned without a fair few slaps on the wrist and repeat offending. I can see why it annoys them, not good!
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norty303 View Drop Down
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Points: 8806 		Post Options Post Options   Thanks (0) Thanks(0)   Quote norty303 Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 5:15pm
Quote Just to make this clear - these arent the little 'laserpens' they're using, more like high powered lasers off http://www.wickedlasers.com/ that are able to burn stuff
 
They are able to burn stuff at a few feet, not a few hundred feet, we're still only talking a few hundred milliwatts here.  My <100mW 532nm 'burns stuff' but doesn't shoot pilots eyes out at half a mile through glass.....
 
And as i said earlier, beam divergence will be big at that range, so energy hitting the iris very small.
 
Also, these are hand held so won't be staying on target for more than a few milliseconds (you imagine trying to hold a 500yd long stick with a 1m wide end on a point a few mm wide)
 
There is a very good post on photonlexicon where they discuss the reality of laser pointer hits on pilots, with input from laserists who are also pilots.  Interesting comments about wickedlasers on the thread too......
 


Edited by norty303 - 09 April 2009 at 5:17pm
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Points: 1683 		Post Options Post Options   Thanks (0) Thanks(0)   Quote subbass Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 5:37pm
True, but I would imagine that a 300mw laser would be annoying if you were trying to pilot a helicopter at night. With the divergence and distance then sure the final intensity would be pretty low - but the article was from the media so there will be a certain amount of pushing the story. (not sensationalism, but in that direction)

Although the quote "When it is right in your eyes, you simply can't see anything else. We are 1,200ft (365m) up, but the beam is strong and sharp." does suggest either a very high powered laser or exaggeration perhaps? Although, Im no specialist on lasers.. =]

edit: oops


Edited by subbass - 09 April 2009 at 5:39pm
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norty303 View Drop Down
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Points: 8806 		Post Options Post Options   Thanks (0) Thanks(0)   Quote norty303 Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 5:46pm
Quote True, but I would imagine that a 300mw laser would be annoying if you were trying to pilot a helicopter at night
 
True, but we were talking about actual damage to the eye... 
 
Quote most laser pointers are not powerful enough, or have a tight enough divergence to do proper damage
 
 
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Points: 1683 		Post Options Post Options   Thanks (0) Thanks(0)   Quote subbass Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2009 at 5:58pm
oh, I was just talking about the general ability to burn things at close range in my first post :)
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