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Introductory Physics Homework Help
Beam Divergence from non-circular laser beam
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[QUOTE="nordmoon, post: 5656819, member: 175498"] [h2]Homework Statement [/h2] The laser beam is not a point source. It is known that it has a rectangular shape with a divergence of 30 mrad x 1 mrad. I would like to know how large my laser lobe will be at a distance of 250 mm from the laser source. [h2]Homework Equations[/h2] I think you can use trigonometri for a triangle. tan(A) = opposite/adjacent [h2]The Attempt at a Solution[/h2] The angle of the rectangle will be half of angle of the divergence spread since the divergence is linear. opposite = adjacent * tan(A), thus opposite_height = 250 mm * tan(15mrad) = 3.75 mm opposite_width = 250 mm * tan(15mrad) = 0.125 mm Thus, the laser beam or lobe should have the size of 2*3.75 mm x 2*0.125 mm = 7.5 mm x 0.25 mm at a distance of 250 mm from laser source. Correct? [/QUOTE]
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Introductory Physics Homework Help
Beam Divergence from non-circular laser beam
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