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Would A Fixed Focus Laser Burn?

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May 20, 2013
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My 1,4W 450nm can burn my skin through 10m away, it also burns very well when set to infinity. I think the width of the beam makes big difference, my 250mW have a smaller beam when set to infinity and can pop a black balloon at 4,2m away, my 200mW laser can't barely burn anything when unfocused, even if is close to the lens.
 





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