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  1. O

    Unfocused laser beam.

    Is an unfocused 300mW 650nm laser safe to look at? I'm not talking about shining it in my eyes or anything, but what about using it as a pointer?
  2. O

    Aviators as safety glasses?

    Out of curiosity, how well would a pair of aviators work as safety glasses? Would the mirrored surface reflect the light of a laser away from your eyes, keeping them safe?
  3. O

    Simple red laser.

    Can anyone help me build a very simple red laser out of an altoids tin? I'm talking battery, diode, switch, and any other bare necessity.  And possibly a momentary button switch and a constant on/off switch. For materials, please try to list items that can be bought at stores, such as...
  4. O

    Making a strong green laser.

    Hi, I want to make a green laser strong enough to light matches, pop balloons, cut tape, etc. I was wondering if any of you could help me. I live in California. My parents don't let me buy anything off the internet though, so that's a big set-back for me. Any suggestions?


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