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3D printed mirror array

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Re: 3D printed mirror array

#11
post #8

I might be getting old but this is the sort of magic by technology I would like to see more of in the world instead of using tech to try putting people into fake worlds in some metaverse.

There is nothing special about this. This is the basis of all MEMS technology used in lidar. Some VR goggle designs probably contain MEMS parts too. It is disingenuous to complain about the metaverse business model while oohing and aahing over the exact same technology used to implement it.

Re: 3D printed mirror array

#14
post #8

I might be getting old but this is the sort of magic by technology I would like to see more of in the world instead of using tech to try putting people into fake worlds in some metaverse.

I don't think the particular metaverses available right now seem that good, but I don't share the consistent prejudices against virtual reality. Why is real reality any better? You can build awesome stuff in virtual reality as well (in fact, you can build almost anything imaginable, at a much lower cost).

Keeping in touch with reality is extremely important (because we are bound by its rules after all), but virtual existence has enormous potential as well :)

(that can't be realized, and certainly not realized for everyone, in the world of atoms -- virtual reality is delightfully egalitarian)

Value the bits and atoms!

Re: 3D printed mirror array

#16

Reminds me of Mitsuba 2; see Caustic Design at about 3 mins into the first video: http://rgl.epfl.ch/publications/NimierDavidVicini2019Mitsuba...

That's impressive. Here someone created a slab of glass that turns the caustics into a picture of his cat: https://mattferraro.dev/posts/caustics-engineering

(discovered via: https://news.ycombinator.com/item?id=29063617 )

Re: 3D printed mirror array

#17
post #10
post #9

Earlier quoted context omitted.

This is quite a bit different. DLP like projectors are binary: straight forward or somewhere away. The layout of the grid of mirrors matches the layout of the dots you can illuminate, in the image. Something like OP has would require some pretty serious angular precision.

You could use holography/beamforming to steer a beam from a DLP, although it would be just a small % of the original power.

I think the beautify of the mirror system is that it's direct, understandable/observable, and nice to look at by itself, even if it's not showing an image. It's elegant. If you use beam formers and DLPs, you're just making an overcomplicated DLP projector that's going to look like an overcomplicated DLP projector.

Re: 3D printed mirror array

#18
post #7

This is future of the street art. Mount it using liquid nails to some place that is hard to access and point it somewhere where lots of people will see it during rush hour. Eg.: You can install it in such way that parliament building will get defaced every day during lunch hours by mounting on near building or tall lamp post. Or maybe put it on your own roof, that way nobody can remove it :-)

like the idea but how much sun does london really get?

Re: 3D printed mirror array

#19
post #8

I might be getting old but this is the sort of magic by technology I would like to see more of in the world instead of using tech to try putting people into fake worlds in some metaverse.

I don't think the particular metaverses available right now seem that good, but I don't share the consistent prejudices against virtual reality. Why is real reality any better? You can build awesome stuff in virtual reality as well (in fact, you can build almost anything imaginable, at a much lower cost). Keeping in touch with reality is extremely important (because we are bound by its rules after all), but virtual e…

Just a thought, but one reason to be skeptical of virtual reality, if only out of pragmatism, is that unlike "real" reality, virtual reality is trivially controllable by single entities.

Maybe not an intrinsic limitation, but for the foreseeable future, VR = a domain where some entity like Facebook is effectively omniscient and omnipotent.

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