Dug out my little Helium-Neon laser. This cute little thing puts out only 1.2mW, but it's a beautifully clean Gaussian beam and very pretty to look at! Takes a mean >1kV to light up this tube.pic.twitter.com/1b1bjo7aG5
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And yes, I know you're wondering if 1.2mW is enough for Bad Apple. It is.pic.twitter.com/Ib5ABzt3KJ
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Close-up of the mirror galvos projecting a very tiny image up close. The beam is quite narrow this close to the tube, so it's still perfectly recognizable.pic.twitter.com/qDrBOKdH5t
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I bought this laser 15 years ago for a high school science fair project to build a laser projector. It didn't *quite* work (super slow response) and it was huge and used HDD voice coils as actuators. I guess this gives it some closure, finally projecting something decent :-)
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