I need a little help understanding the specifications for Lasers. I just bought a 400 mw green LASER that has a beam diameter of 1.5mm at aperture and that's self explanatory, but it says Beam Divergence is 1.5mRad. I don't know what that means, how big would the beam diameter be at 100 meters? :thanks:
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Beam Divergence?
- Thread starter eggplant
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Have you taken any trig? mrad is an abbreviation for 0.001 radians.