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.
3D printed mirror array
41–50 of 152 posts
Re: 3D printed mirror array
#42Earlier quoted context omitted.
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.
Can you please not post in the flamewar style to HN? We're trying to avoid flamewars here, and I'm sure you can make your substantive points without that. https://news.ycombinator.com/newsguidelines.html
I mean, I don't think the parent post was that substantive either. There is nothing in this submission that necessitates roping in the topic of the metaverse. They could have just left it as they found this tech interesting.
Re: 3D printed mirror array
#43Reminds 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 )
'two minute papers' has a link to a free course on how to do this. I haven't checked them out. https://www.youtube.com/watch?v=_r-eIKkyAco Note: the title says 3d printing but it's actually milling acryllic sheets, not SLA
Re: 3D printed mirror array
#44There is an artist (at least) that uses arrays of motorized parts to create a similar effect https://www.youtube.com/watch?v=kV8v2GKC8WA mesmerizing
This is quite close too : https://prusalab.cz/projekty/reflexe/
(Petr Vacek & Adam Cigler / Prusalab / Czech Republic)
Re: 3D printed mirror array
#45Excellent. 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'd probably want to use galvos instead of servos for this application (high speed/precision, low load mass).
Re: 3D printed mirror array
#46Excellent. I wonder how practical it would be to put each mirror on a servo so that you can change the image in real time?
Look up "Adaptive Optics". That's literally what you describe :) They've got a somewhat niche use in astrophotography.
Re: 3D printed mirror array
#47I'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.
Re: 3D printed mirror array
#48Re: 3D printed mirror array
#49This 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 :-)
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.
Re: 3D printed mirror array
#50Earlier quoted context omitted.
Can you please not post in the flamewar style to HN? We're trying to avoid flamewars here, and I'm sure you can make your substantive points without that. https://news.ycombinator.com/newsguidelines.html
I mean, I don't think the parent post was that substantive either. There is nothing in this submission that necessitates roping in the topic of the metaverse. They could have just left it as they found this tech interesting.
If you can't say something nice about a project like this then say nothing at all. To belittle it is classless.