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3D printed mirror array

github.com

51–60 of 152 posts

Re: 3D printed mirror array

#51
post #2

Excellent. I wonder how practical it would be to put each mirror on a servo so that you can change the image in real time?

You can get MEMS microscanners although they're probably a bit small - https://en.wikipedia.org/wiki/Microscanner but they can orientate a mirror on two axes. This one looks a pretty decent size - https://www.sercalo.com/products/mems-mirrors/mm160110-2

Swiss made precision optical gear. I think the price of that little mirror just might make your head spin.

Re: 3D printed mirror array

#52
post #41

I'm wondering if a similar effect couldn't be done using a continuous surface and just silvering it. I saw something similar done with refraction but can't remember the URL now. 3D printers definitely have higher resolution than mirrors of this size.

If you're willing to spend a lot of money on silver then probably yes. After all the height differences are substantial and silver isn't cheap. 3D printers resolution sucks in comparison to the mirrors, I'm not sure what you mean by that.

Not quite sure you need that much silver. You need some filler between the silver layer and the crude plastic surface to get the silvering smooth, but that filler doesn't necessarily need to be silver. As for the resolution, I'm judging it from this picture: https://raw.githubusercontent.com/bencbartlett/3D-printed-mi... - there seems to be almost two orders of magnitude of a difference between the size of a flat mirror and the size of the "printing step".

Re: 3D printed mirror array

#53

Earlier quoted context omitted.

Word of warning: https://en.wikipedia.org/wiki/Aqua_Teen_Hunger_Force#2007_Bo...

Wild, the police thought that the LED display, that had already been up for 4 weeks, might be a bomb, and then they somehow spent a million dollars handling the 'threat'. Wilder still, Turner bought off the police after for 2 million dollars, and then censored the creators from releasing an episode critical of the Boston police response.

If you ask yourself where the money comes from, who gets to decides to spend it, and how much fun the police had playing with their toys, it all seems to make good sense.

Re: 3D printed mirror array

#59
Very cool.

In a less-artistic application, you could use this idea to print multiple sections that could be assembled to make a large pseudo-parabolic mirror for a solar concentrator. You wouldn't get telescope-quality imaging, certainly, but if all you needed was to concentrate a lot of light on a small space (for a steam generator, say) it should work fine.

Congrats on the upcoming wedding!

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