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    Coherent LaserCheck > 1W?

    I have a Coherent LaserCheck, Handheld Power Meter. It can measure from 0.5 microWatts to 10 mW with it's native Silicon Cell Sensor, and it has a built in 1mm-thick NG-10 Attenuator that extends it's range up to 1 Watt. How can I use it to measure laser power greater than 1 Watt? I'm...
  2. I

    Why does the beam end in the sky?

    I have a 100mw green laser and when I point it at the sky the beam 'stops' abruptly. Whichever way I point it, unless it hits something like a tree or a powerline, but just pointing it in the empty sky it appears to 'stop'. And always the same distance away. What causes this effect? It's as...




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