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AmDrag
Fusion Laser


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PostPosted: 2/15/07, 12:49 AM    Post subject: Black &quo Reply with quote

This is NOT REAL, just me musing.
We all obviously have seen devices that project light outward. What if the technology were to be developed that allowed a device to create an absence of light in one spot, a theoretical "black" laser?

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Napalm_Fire
Wicked Lasers God


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PostPosted: 2/15/07, 12:51 AM    Post subject: Reply with quote

there was a thread about this not too long ago..

and i think this should be in the forum "invisible lasers" Laughing Laughing Wink

/end nit picking

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AmDrag
Fusion Laser


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PostPosted: 2/15/07, 12:55 AM    Post subject: Reply with quote

It is not truly an invisible laser, though, in the sense that invisible lasers are still projecting electromagnetic radiation of some wavelength. Theoretically, this device would create a total absence of light. I guess it wouldn't really be a laser either, though, because laser is defined as light amplification by stimulated emission of radiation, and this thing acts more like a portable black hole... Anyway, point taken Smile
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Rasel
Wicked Lasers God


Joined: 05 Jan 2007
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PostPosted: 2/15/07, 12:55 AM    Post subject: Reply with quote

Yea this has been gone over twice in the past that I remember... it got to be a pretty long thread too.

Anyway the result was no, it isn't possible.

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AmDrag
Fusion Laser


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PostPosted: 2/15/07, 12:57 AM    Post subject: Reply with quote

Gone over twice? Wow, I need to keep up on the older posts. I know that it wouldn't be possible, it's just the idea.
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Rasel
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PostPosted: 2/15/07, 1:08 AM    Post subject: Reply with quote

I'm sorry, actually it is possible. RR even made a video for everyone:

http://www.youtube.com/watch?v=zKCJRGOUmcU

This was the main "Black Laser" post:
http://www.lasercommunity.com/viewtopic.php?t=10255

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Chief-Eamonn
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PostPosted: 2/15/07, 4:26 AM    Post subject: Reply with quote

yeah but that wasnt realy a black laser that was just a dim grey projection in a incredible lit up room. still looked pretty cool though. Smile
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Napalm_Fire
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PostPosted: 2/15/07, 9:16 AM    Post subject: Reply with quote

haha i never saw that. when i was reading the intro, i was imagining him tying a black piece of yarn to the end of his labby or something, hahahha..
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Cant put the brand name for some dumb reason 532nm - 100-120mw
Nope! Cant post this one either 200mw 665nm - On the way!
Not even the name of the 5mw 532nm - On the way! (Planned for IR burner. Crystals to be removed)
Flashlights arent allowed either??! Flashlight - 2x CR123A
450w Some Brand Smoke Fogger
Orange Powerball(only thing allowed to have a brand name) 250Hz - Left Hand: 11318 || Right Hand: 12183
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mr_bear
Modified 10mW Greenie


Joined: 19 Feb 2007
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PostPosted: 2/19/07, 5:07 PM    Post subject: Reply with quote

You guys are all missing a key scientific discovery...namely darkons! Although the device would probably be called a "daser" instead. Here's some detailed info:

http://home.netcom.com/~rogermw/darksucker.html

(note: if this document makes no sense, it's just that your mastery if Physics is lacking...)

Laughing Laughing Cool
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King K
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Joined: 06 Sep 2006
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PostPosted: 2/19/07, 7:35 PM    Post subject: Reply with quote

Black lasers DO exist, check out my Black-Ray Sonar!



And purple vaseline glass marbles exist too!

(I'm just kidding, black lasers do not exist, Sonar pic by RoadRunner)

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nero_design
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PostPosted: 2/19/07, 10:11 PM    Post subject: Reply with quote

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kades
Fusion Laser


Joined: 27 Dec 2005
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PostPosted: 3/04/07, 9:53 AM    Post subject: Reply with quote

You can actually see interference patterns (black spots) when a laser is shone and reflected off a white surface, but my guess is it'd be very hard or virtually impossible to make an anti-laser as good as an the anti-sound devices we see today.
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Olozhika
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PostPosted: 5/05/07, 2:03 PM    Post subject: Reply with quote

Portable black holes that can be focused down? Coherentoles? Blakazer? Not a reality in the forseable future.
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RoadRunner
Wicked Lasers God


Joined: 05 Nov 2006
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PostPosted: 5/05/07, 2:09 PM    Post subject: Reply with quote

kades wrote:
You can actually see interference patterns (black spots)

Remember though, that those spots are not black. They just don't contain the original laser-light. They are at the same colour/intensity as they would be if the laser was not switched on. ie.. They are the same colour as the surface would be in regular ambient lighting.
They only appear black because of a trick of our vision in the way that we see contrasts.

The RoadRunner..

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Schrecken Licht
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PostPosted: 5/05/07, 10:53 PM    Post subject: Reply with quote

I swear, everytime someone puts up a black laser post, all I can think of is that Hellraiser movie (don't recall which one, maybe part 2?) where there is this anti-searchlight, sort of like a lighthouse but with a beam that sucks up all light....I guess a black laser would have to be an evil laser! Twisted Evil
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