Old 08-13-2016, 12:36 AM #1
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Default Dust on the opposite side of the three elements glass lens

Its been a week since I made a laser with the NDB7875 at 2.4A. After burning some cardboard with it, I noticed there was splash caused by a piece of dust on the side of the lens closest to the diode. I cleaned it off with a q tip and rubbing alcohol but I am just wondering how a piece of dust could have got on the other side of the lens? I burnt paper and cardboard before but never had any dust on the lens that could produce any splash.


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