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> The device contains a projector that beams an image up onto a screen, which in turn vibrates up and down at a rapid speed. The rapid vibration allows the imag
by evan_ 13y ago
> The device contains a projector that beams an image up onto a screen, which in turn vibrates up and down at a rapid speed. The rapid vibration allows the image to appear as though it’s a 3D asset.
http://www.extremetech.com/gaming/174772-voxiebox-a-real-life-star-wars-3d-holographic-display-that-plays-video-games http://www.extremetech.com/gaming/174772-voxiebox-a-real-lif...
I don't see how this technology can really scale very well. The plane that you project on has to move through the entire depth, so if you wanted something that was deeper than the 4-5 cm in the demo video you'd have to really increase the speed, or you would start to lose the persistence-of-vision effect that makes it work.
Edit: I found this video of a TEDx talk the team did, it's pretty interesting. Their original prototype projected onto a sweet potato.
http://www.youtube.com/watch?feature=player_embedded&v=Tdta2YhEwZA http://www.youtube.com/watch?feature=player_embedded&v=Tdta2...
According to this video Ken Silverman (of BUILD engine fame) is on board, which is pretty huge.
- moocowduckquack 13y agoAhh, so volumetric rather than holographic then. I always get a bit suspicious of claims of commercial holographic displays due to the data requirements, if nothing else. Here's an analysis from the MIT Spatial Imaging Group, for instance. "a hologram of dimensions 100 mm by 100 mm and a viewing angle of 30 degrees contains approximately 25 Gigabytes of information, or the equivalent of 25 billion samples of information - all for a single frame. In order to update such an image with 8-bit resolution at a rate of 60 frames/second, a data-rate of 12 Terabits/sec would be required for transmission of the hologram" http://www.loreti.it/Download/PDF/Olografia/holovideo/MIT/spie90.pdf http://www.loreti.it/Download/PDF/Olografia/holovideo/MIT/sp...
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- jnhnum1 13y agoI don't think the data requirements are that realistic. While the actual interference patterns on a hologram would be ridiculously large to send as a bitmap, it's easy to compute the interference patterns for the superposition of points of lights, which is what this volumetric display is showing anyways. So a computer would only need to send a list of points and colors to the display. http://en.wikipedia.org/wiki/Computer-generated_holography#Point_Source_Holograms http://en.wikipedia.org/wiki/Computer-generated_holography#P...
- moocowduckquack 13y agoYou still have to drive the display. If you are just sending minimal information, you then need something to process that data and output the 12 terabits/sec.
- mortenjorck 13y agoI hate to say it, but this is another, probably impractical attempt at the holy grail of 3D displays, the "3D projector" visualized in probably nine out of every ten big-budget science fiction films over the past thirty years. It's something we dream of making a reality, but the laws of physics just aren't on our side for volumetric displays. This isn't a problem that's going to be solved until someone discovers some novel property of light that allows two invisible beams to converge into a visible point.
- dnautics 13y agoas in two-photon holography? Unfortunately, there aren't too many good fluorescent compounds in air (oxygen can emit weakly in the deep red, but I'm pretty sure the free radical compound that results is not something you want around).