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IndustryArena Forum > Laser Engraving and Cutting Machines > General Fiber Laser Cutting > How can I know if these W/m2 values are safe while using eye protection?
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  1. #1
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    Sep 2021
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    How can I know if these W/m2 values are safe while using eye protection?

    I’ve made some measurements using a power meter behind some eyewear protection in order to validate them.

    I tried with a fibre laser machine (1064 nm) and when I put the googles about 2 centimeters to the laser while its working, the instrument (behind the glasses) reads about 450 W/m2. Withiut the safety glasses it reads 900 W/m2.

    I did the same using a 40W UV Lamp but this time the glasses and instrument are looking directly into the lamp (20 centimeters of separation). Without safety glasses it reads 6.5 W/m2 and with eyewear protection it reads 2.8 W/m.

    Are my tests coherent or do I need to try something different?

    Is there a standard of how many W/m2 are safe in each application

  2. #2
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    Mar 2009
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    1720

    Re: How can I know if these W/m2 values are safe while using eye protection?

    Point your measurement device to the sun directly at midday and on evening susnet. Human eyes are damaged by direct midday sun in ten minutes and by bright sunset in two hours. Sure, it depends where you are in regards of equator, but stiil it gives some understanding about dangerous exposition.

  3. #3
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    Join Date
    Apr 2021
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    7

    Re: How can I know if these W/m2 values are safe while using eye protection?

    I'm certainly not an expert in this field but if you want professional safety goggles it's better to test them in a laboratory. There are special lasers for checking the degree of transparency. I have not encountered such problems, but my neighbour always buys several kinds of glasses and then prepares his eyes before he starts work. He used to buy drops www.mcdaidpharmacy.ie here and said they help restore his eyes after working with a welding machine. I think you should know these circumstances better but I can advise prophylaxis.

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