I need some help here, laser safety thread on lpf

[mixedgas]

GUYS, I'M JAMMED UP THIS WEEK, I NEED SOME HELP ON THIS ONE:

http://laserpointerforums.com/f53/my...s-48440-2.html


THANKS, STEVE

[buffo]

The level of stupidity in that thread boggles the mind. And to think that one of our own (F22Warzone) is one of the people spreading the stupidity. (He brags about audience-scanning with a 1.5 watt yag in his home, and in the same post relates a "safety incident" where he got flashed by the reflection of said laser off a window.) Dude, I thought you were smarter than that! Sigh...

There are a few voices of reason in the thread, but no one is listening to them. I'm starting to understand why Pat (Laserman532) decided to leave LPF. Truthfully, I don't blame him.

And as awful as it is, I'm not about to join that forum just to argue with a bunch of clueless teenage idiots who *think* they've got it all figured out already. My blood pressure is high enough already.

Adam

[mixedgas]

From O'Hagan

Table 5.1 NOHD as a Function of Radiant Power and Beam Divergence for a
Single Accidental Exposure to a cw Beam
Radiant Power ®
Divergence ¯
...... ... 100 mW .... 1 Watt ..... 10 Watts
1 mrad .... 71 m .... 224 m .... 708 m
2 mrad .... 36 m .... 112 m .... 354 m
5 mrad .... 15 m .... 45 m .... 142 m

NOMINAL OCULAR HAZARD DISTANCE, THE MINIMUM DISTANCE TO BE OK, WELL, SORTA, WE'RE NOT REALLY SO SURE, BUT YOU MIGHT BE, safe.... FOR ONE PULSE, NOT REPETITIVE SCANS..

STEVE

[f22warzone]

...
Dude, I thought you were smarter than that! Sigh...
...
Adam

I am..... like I have already posted and said I was stupid for that one incident and deleted all that stuff sorry I was wrong : ( if you could delete my quote that would be great so I can just bury my stupidity, learn from it, and move on : )

[ElektroFreak]

No foul, f22.. you already admitted your mistake. I would imagine buffo posted that before you had.

I'm just glad to see that some of the more experienced minds here are willing to attempt to set the record straight on safety over on LPF. Not everyone will listen, and there are some members who "know better" than everyone, but at least the facts are posted for the world to see.

[allthatwhichis]

GUYS, I'M JAMMED UP THIS WEEK, I NEED SOME HELP ON THIS ONE:

http://laserpointerforums.com/f53/my...s-48440-2.html


THANKS, STEVE

I have a real world example... I have been hesitent to bring this up... or actually to admit it. I suffered an eye injury about a month or so ago from my projector.

I have a small loss of pigmentation in my macula (SP?) that the eye doctor could/can see. About a third of the way out from the center around 11 o'clock... This caused a small area of my vison in my right eye to stay "dark" for a slpit second after I blink although only at a certain range. It is not all hat noticable unless I am "looking" for it. The eye doctor told me to take a certain brand, floglo or something, of Lutein, (this is what the macula is made of) and it should "clear up some" but possibly not all the way. I have been taking 10mg a day... I saw the eye doctor a week after it happened just for him to look at that eye. I returned 2 or 3 weeks later for a normal eye exam and he stated if he had not seen the damage prior he is not sure he would recognize it as damaged now. It may become more noticable as I get older.

I basically was reaching for something out side of my attenuation map and opened my eye too soon while leaning back into the "safe zone". I can tell you what frame it was that hit me although I am not certain which beam in the frame that got me. I would guesstimate the power to have been no more that 150mW and it was moving.

Any chance this is the type of post needed?

[mccarrot]

I had not seen this document before,its interesting:

http://www.laserfx.com/BasicSafety/C...n%20Hazard.pdf

[QUAZAR]

Those figures Steve quoted certainly look right. The figures I worked out for my 60X gave 66M NOHD.