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    Beam Splitter Cheap

    I need polarised beam splitter for red laser, where can I get it cheap, I was thinking about harvesting CDRW or maybe DVDRW, anyone knows if this would work?
  2. T

    Laser Microphone

    Hi guys, I am thinking about building a laser microphone and found quite a bit of sites and videos on google about it but most of them are the angular solutions there is also this bounce back solution with beam splitter look here Fig 3. I have a question about the beam bouncing, on the diagram...


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