Laser protection

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ednisley:

gels are completely transparent to infrared light &#; A CO&#; laser deposits enough concentrated energy to cut them just fine

If your co2 is ir, then how could it possibly cut them?..

They supposedly are made from polycarbonate, polyester plastics.

IR is a very wide range of frequencies&#; my ir fiber would probably go right through them.

Where did you get the photos? neat&#;

Lasers are not very useful without a lens. Once it passes through the lens there is a focal point, past the focal point the power drops off very quickly. Put something that reflects the beam and the power drops so much it&#;s pretty much useless. A couple inches away from the focal point on my 40W co2, I can&#;t mark a Kleenex tissue&#; virtually no power&#; wouldn&#;t stick my head in there and look at it either.

I&#;m sure all of us have used a magnifying glass to burn wood or other objects. This is how most lasers work&#; the beam is focused down to a small point where the power density is much higher&#; once it&#;s out of focus there is no power to do any real work.

The sun produces a very wide range of emf, including x-rays and gama rays from the suns corona. This damages the dna in your cells.

Burn is generating a broad spectrum of frequencies aside from the actual laser frequency&#; When the co2 burns it produces lots of these frequencies of light that can damage your eyes and your protective lenses allow through&#; using a co2, the IR is not visible to human eyes, but it&#;s a very bright burn when it operates.

If you don&#;t know the frequencies of the generated light (emf) how do you know if the safety glasses are really protecting you from other sources of laser generated emf that we know damages your eyes?

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After one or two jobs, my brain told me to not look at the cut point, it&#;s too bright so there must be some type of damage occurring&#; the fiber is mesmerizing when it runs, so it&#;s hard not to look &#; but required now and then.

If you hunt around you can find experienced, highly technical people that have the equipment and knowledge to test these optics. I haven&#;t heard any of them say anything other than the $250 high end laser safety glasses are no better than the $20 Chinese safety glasses. Who are you going to believe, the salesman or the technical people?

I don&#;t value testing these glasses enough to figure out how to test them without deep pockets. I would think just diverting the beam and using one of the many optical sensors we have could allow at least a proportional value. It would be non destructive to the glasses and give you a good idea of their effectiveness at that particular frequency&#;

Sorry I was long winded, but I get tired of decisions generated out fear and not from facts.

All I&#;m saying is listen to everyone, we all have opinions, good or bad based on something. If the base of the opinion is from an Illumination Engineer, that might be more useful than the guy who&#;s doesn&#;t know what a laser is.

Use your knowledge along with your research and your common sense to guide you.

Understand how this stuff works is probably the most important lesson you can learn. Then you can separate the from Shinola. You will be safe, comfortable and happy with your decision&#; as it will be the best decision you could possibly make.

Then you can add your opinion here

Safety should be on every ones mind at all times when operating any tool/machine &#;

Good luck&#;

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