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- Jun 14, 2014
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hi all this is my first post, and i have a question.
im new to lasers, and i recently got myself a 5mw green laser for star pointing. when i was playing around with it, i attached a small lens to it and i was able to focus the beam to a very narrow point, i roughly estimated the beam to be anywhere between 0.1 to 0.2 mm, i cant get more accuracy.
when i plugged in the numbers, the power density at that point is about 3100 W/cm2, thats about the same as a 150mw laser with a 1.1mm beam width....
so the question is, is that a high enough power density for me to use goggles?
im new to lasers, and i recently got myself a 5mw green laser for star pointing. when i was playing around with it, i attached a small lens to it and i was able to focus the beam to a very narrow point, i roughly estimated the beam to be anywhere between 0.1 to 0.2 mm, i cant get more accuracy.
when i plugged in the numbers, the power density at that point is about 3100 W/cm2, thats about the same as a 150mw laser with a 1.1mm beam width....
so the question is, is that a high enough power density for me to use goggles?