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some glass for the laser sniper rifle (Patreon)

Published:
2017-12-05 02:49:38
Imported:
2026-06
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so I want to build a laser sniper rifle...something that can burn stuff really far away. the laws of physics make it hard to do this, but you can cheat by building a reverse telescope and shooting the laser through it. #esco #optics sent me some nice lens

232 Likes, 17 Comments - Drake Anthony (@styro.drake) on Instagram: "so I want to build a laser sniper rifle...something that can burn stuff really far away. the laws..."

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TheBackyardScientist

I had the same Idea, but I don't know enough to actually do it. My idea was to expand the beam onto some kind of parabolic reflector, like the opposite of a satellite dish. I could not figure out how to get it to focus at more than one distance though. It must be possible, the military can do it somehow.

styropyro
>>8688019

it's probably a lot harder to do with mirrors, but if you use mirrors you'll avoid any wavelength dependent errors in your design (especially useful for imaging stuff). you only need two lenses to make the beam expander, and as far as optics go the math is incredibly simple. it's basically a Galilean telescope in reverse, but instead of leaving the distance between the lenses fixed, you put one lens in a threaded mount or something similar so you can change where the focal point ends up.