Green long-distance illuminator

[ubetit]

I searched the site and couldn't come up with a discussion on this. http://www.lasergenetics.com/nd5-laser-designator.html

It's a laser, it's a flashlight so I didn't know where to stick this thread. Does anyone have any real world experience with this? Looks like it could be an excellent night hiking light.

 

[Jethro]

I think I'll wait until they make a cheaper version!!

 

[fyrstormer]

How odd, I was just thinking the other day that a green or blue laser with an adjustable optic on it would be a great way to signal aircraft for help without blinding anyone.

 

[ubetit]

I just wonder how it works to light the way.

 

[Crenshaw]

THe idea of using lasers to attract attention has been around for awhile

http://www.equipped.org/rescuelaser.htm

but i must say thats a cool idea. ALthough at 20mw, thats not a lot of light.

Lasers are only bright because they are so focused. Specifically de-focusing them like that would significantly reduce its brightness no?

Crenshaw

 

[fyrstormer]

Lasers are bright because they are focused, but also because the light waves are coherent, i.e. all the same wavelength and phase, so you don't have some photons cancelling out other photons because they're out-of-phase with each other. (If you look at a laser beam reflected off a wall, you can actually see "sparkles" in the beam as photons bounce off the texture of the wall, stop being in-phase with each other, and start cancelling each other out in some spots and not in others. That's how CD players read the bumps on CDs, by the way.) So a coherent light beam, even de-focused, would still throw very far with a minimal amount of power.

Good thing too, since anything over 5mW is illegal in the USA unless you have a justifiable use for it.

 

[kosPap]

first if all Lighthound sells a green rescue laser....

second, on the laser flshlight...I do not know if it as the same firm, but search youtube from the vids from the Shot Show 2009...
There was a demo a such a device....

(sorry i cannot spare the time to do it myself)