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    Dust and safety covers or caps for lasers

    I'm looking for ideas on materials for DIY dust and safety covers for handheld lasers. The safety cap which came with the host I'm using for a 2W laser is a silicone rubber cap that does not fit the new lens I've installed. I'm not keen on my normal go-to choice of black electrical tape...
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    I'm after a clean beam - what to look for?

    After having a lot of fun with <5mw red lasers, I recently put together a focusable high power blue laser. Sad to say, I was disappointed in the properties of the beam, with the spot at ~10mm by 25mm at only three meters at its best focus. It seems I need more information before acquiring a new...


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