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Old 06-05-2012, 02:21 AM #1
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Default High-Powered 445nm beam in sky

Hey, I was just wondering when pointing my laser out into the abyss of night, you can see a bunch of speckles of light from debris and/or bugs entering the beam, and they're very bright. Do those speckles damage the eyes, or is it too wide of a reflection to cause damage?

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Old 06-28-2012, 08:47 AM #2
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Default Re: High-Powered 445nm beam in sky

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Originally Posted by Nomad32 View Post
Hey, I was just wondering when pointing my laser out into the abyss of night, you can see a bunch of speckles of light from debris and/or bugs entering the beam, and they're very bright. Do those speckles damage the eyes, or is it too wide of a reflection to cause damage?

Thanks!
I would think not, but I'm no expert. Mabie if there was a large extremely reflective bug that flew though the beam at a really close range?
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Old 06-28-2012, 12:44 PM #3
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Default Re: High-Powered 445nm beam in sky

Why are you shining a 'high powered' laser in the sky for???
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Old 06-28-2012, 02:41 PM #4
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Default Re: High-Powered 445nm beam in sky

For beaming purposes. If the laser is properly mounted and care taken to ensure nothing significant (trees, airplanes, etc) are in the path, it is considered generally safe to view the beam without goggles. It is otherwise impossible to view a laser beam with goggles on.
A bug flying into the beam is eye-safe, since it is a diffuse reflection off a surface of relatively low albedo.
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Old 07-02-2012, 05:21 AM #5
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Default Re: High-Powered 445nm beam in sky

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I would think not, but I'm no expert. Mabie if there was a large extremely reflective bug that flew though the beam at a really close range?


Large reflective bugs, oh no we can't have that it's every laser hobbyists worst nightmare. Be glad reflective insects don't exist, until then - Mirror Bugs, the next Hitchcock movie.
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Old 07-14-2012, 11:10 PM #6
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Default Re: High-Powered 445nm beam in sky

Just to add to the posts, i think its pretty safe
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Old 07-21-2012, 01:25 AM #7
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Default Re: High-Powered 445nm beam in sky

Also, the 445 nm wavelength is good for use in the night sky because it has a short "destructive" range. That being said, unless you're talking about a 35,000 ft jetliner, the laser will still blind the pilots, but not as severely as a green laser, which travels much further distances.
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Old 07-23-2012, 01:29 AM #8
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Default Re: High-Powered 445nm beam in sky

(3X) 532(comb 1.3W) & 445 (1..2W)Camera pan.(moving) lasers stationary.~ /1/4 sec- very heavy fog ( or light mist ).

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High-Powered 445nm beam in sky-foggy-night-3x-jet-250s-luke-445-011.jpg   High-Powered 445nm beam in sky-foggy-night-3x-jet-250s-luke-445-009.jpg  
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Old 07-23-2012, 01:54 AM #9
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Default Re: High-Powered 445nm beam in sky

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(3X) 532(comb 1.3W) & 445 (1..2W)Camera pan.(moving) lasers stationary.~ /1/4 sec- very heavy fog ( or light mist ).

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