5 Things to Know Before Buying Laser Protection Film
Jun. 24, 2024
Laser protection
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ednisley: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 its pretty much useless. A couple inches away from the focal point on my 40W co2, I cant mark a Kleenex tissue virtually no power wouldnt stick my head in there and look at it either.
Im 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 its 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 its a very bright burn when it operates.
If you dont 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?
After one or two jobs, my brain told me to not look at the cut point, its too bright so there must be some type of damage occurring the fiber is mesmerizing when it runs, so its hard not to look but required now and then.
Contact us to discuss your requirements of Laser Cutting Protection Film Supplier. Our experienced sales team can help you identify the options that best suit your needs.
If you hunt around you can find experienced, highly technical people that have the equipment and knowledge to test these optics. I havent 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 dont 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 Im 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 whos doesnt 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
Laser protective acrylic
Yep, you've only got one spare!
But... orange is orange. These 'laser safety' companies are charging huge money for what is just normal coloured acrylic. They give all sorts of fancy figures, and 'OD' numbers, but what they really do is to buy a bunch of off-the-shelf acrylic and put it through a spectrum analyser - which you can do at home, except the cost of an analyser is more than a sheet of 'laser' acrylic.., but, I just happen to have a transmissive and reflective spectrum analyser and the absorption capabilities of yellow through red acrylic give varying levels of absorption of 445nm light, from over 50% to over 90%.
And I live in the middle of nowhere in SE Asia, where you can't easily buy 'laser safe acrylic'... unless you want to pay US$150 for shipping of a 12"x12" square.
There's nothing special about 'laser safe' acrylic - its just coloured acrylic that naturally absorbs a specific range of frequencies of light. Orange is high up on the visible spectrum - around 640-650nm - which means it doesn't transmit other, lower colours, but passes the range we see as orange.
If you had a blue sheet of acrylic, that's low on the spectrum - 420-470nm, depending on the colour. That would pass a 445nm laser, but block a red diode laser at 640nm
It very much matters a) what kind of laser - diode vs CO2 b) the power of your laser c) IR or visible spectrum d) the opacity of your acrylic.
For IR lasers, even a sheet of clear acrylic will block 95% of IR. But a clear sheet won't do much at all for a visible-light diode... and theres a reason black acrylic is easy to cut - it absorbs all the energy and converts it to heat.
So, don't worry too much about it - if you have a 500mw - 10W 'blue' laser diode, a sheet of 50% orange acrylic will cut down the transmission of harmful rays to a non-harmful level. So will dark sunglasses, but without knowing the colour of the glasses and the frequency of the laser, you are just being stupid to use sunglasses as your primary defence.
And you can test it yourself - get a piece of acrylic you want to test, set your laser at 90deg to the beam, place a piece of tissue paper or other easily burned object and fire up. You won't even be able to scorch light tissue with the beam focused on the paper.
Reflection is the major source of stray coherent light beams in unexpected places. And, unless you're cutting or engraving mirrors 0.o then the reflected beam is going to be significantly lower powered than the beam that struck the object. it will also absorb some of the 'speed' of the beam, shifting it to a lower frequency.
If you want to DIY your laser shielding, get some complementary coloured acrylic and for additional safety some 'one way' reflective film for the inside and you will be fine - but ALWAYS wear your safety specs, even if you have shielding. One accident is all it takes.Click to expand...
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