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  1. M

    Custom Laser Goggles

    What materials are laser goggles made of? I would like to make a custom pair to clip on my glasses. Due to the environment in which I will be using the lasers, I only need to protect myself from the diffusion, not the beam itself.
  2. M

    Can someone explain how beam divergence works?

    I don't understand why it's so hard to make parallel beams for laser pointers. If you can refract light any way you want, couldn't you adapt a lens' surface according to its input to point every incoming photon straight out?




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