a collimated laser beam with a divergence of 4.1 milliradians is incident on a lens of...
a collimated laser beam with a divergence of 4.1 milliradians is incident on a lens of focal length 250mm. Calculate the spot size of laser light at the focal point of the lens
Homework Answers
Using the equation we have
= 1.22*
/
D
4.1*10^-3 = 1.22*250*10^-3 / D
D = 74.4 m
so spot size = D/2 = 74.4 /2 37.2 m
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