At What Distane is a 1 Watt Laser Safe

[The Grand Pooh Bah]

I know anything above 5nm has the ability to damage your eye but at what distance does the laser no longer become an imminent danger to someone’s vision.

For example, would a 1-watt laser at 300 feet do permanent damage if it were to flash over your eye or would the beam be too dispersed to damage your eye?

TIA

 

[Hemlock_Mike]

What is the beam divergence, exposure time etc.
This has been discussed here over and over and .....
HMike

 

[The Grand Pooh Bah]

Link???

 

[InfinitusEquitas]

Until you can determine otherwise...

Assume that a 1W laser will do permanent damage at 300 feet or farther.

(Hint, look into NOHD and MPE...)

 

[Bluefan]

Link???

Laser Pointer Forums - Discuss Lasers & Laser Pointers - Search Forums

 

[The Grand Pooh Bah]

FYI the link below having a compilation of wavelength vs. power vs. distance eye hazard assessment sources::

http://laserpointerforums.com/f53/laser-hazard-analysis-calculations-71299.html#post1026979

Hazzard vs. Distance Chart from LaserPointerSafety.com

Thank You....That is what I was looking for.

My search before asking was unsuccessful in finding this answer.

 

[TheReddish]

I wonder why it show no flash-blindness for 445nm I have been flash-blinded by the dude I was selling a 445 too, I was about 250' away and it looked like a camera flash went off in my head and I had no night vision for about 5min in no way would I call it glare more like a flash bang without the bang. Also I was not injured but temp disoriented. it was 1 1.4w and was a 3 piece axis lens focused as well as I could get it to infinity. It has been also stated that by MPE that at 10 times MPE limit 50% of the ppl get some kind of injury. Though I don't remember where I read that.

then again it does say worst case, I just find it weird that by glancing at it 445nm cannot flash-blind you.

 

[Things]

In other words, at the distance 445nm would give you flash blindness, it'll also be an eye injury hazard

 

[TheReddish]

In other words, at the distance 445nm would give you flash blindness, it'll also be an eye injury hazard

so 730 some-odd feet so with the mrad and MPE what we are really seeing is about 300' you have a 50% chance from say a 1.4 W laser to instantly damage your eye give or take. WOW had no idea I flipped a coin that day. man I am glad I got heads and not tails on that one.

DID no math so my numbers are way off but, still. sobering