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Colossal Holograms

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Re: Colossal Holograms

#71

Post by Filligree »

m3kw9 wrote: post #70

Looks like 3D inside a tv. It ain’t holographic unless it projects enough for you to touch thru it.

Projection is entirely impossible. The photon's path has to back-track through the device; this is true regardless of the type of device you're using to make it.

Re: Colossal Holograms

#72

Post by Filligree »

jkoberg wrote: post #60

> That’s why five years ago, my co-founder Alex and I started a company to prove that holographic displays were possible This is spam

It's an ad, but it's the sort of ad I sincerely desire to see. C'mon, this is immensely cool.

Re: Colossal Holograms

#75

Post by theophrastus »

matt_the_bass wrote: post #19
brazzy wrote: post #17

Any info on how it works?

There are multiple transparent lcd (or maybe led - idk) screens layered on top of each other. A different image is rendered on each layer to appear 3D. A single 8k video stream is sent to the display. Each 8k image is subdivided into multiple smaller images, one for each layer. So the entire image is 8k, not 8k per layer. I know one of the cofounders, Alex, a bit. He’s a really earnest and excited person. He’s been w…

That's impressive; and for me a bit reminiscent. I got my doctorate staring at macromolecular structures through various attempts at presenting them in 3d. One of the earliest I encountered was called a "Richard's Box"[0]. That setup was a set of clear plastic sheets on which were plotted 'slices' of electron density which were subsequently stacked-up with suitable sized spacers and you looked down through the stack with an lamp beneath. This approach sounds very similar, but with an active display in place of each sheet of plotter output.

[0] https://www.umass.edu/microbio/rasmol/history.htm

Re: Colossal Holograms

#76

Post by SamBam »

pluma wrote: post #57
tyingq wrote: post #37

Earlier quoted context omitted.

This looks like "coming out of the screen" to me: https://miro.medium.com/max/1200/1*-nm0AvcydVzyhgDFdh6V2g.gi... Do you mean the effect doesn't work with back to front motion? Like that pan can't start in the back and move forward?

Too late for an edit but I was going by what was shown in the video, which very much didn't look it could do that. That said, that's still basically "3D but without glasses", not exactly the Holodeck "hard light" future tech many people think of when they hear "real hologram".

Yes. Most people think of something like this image of princess Leia coming out from R2: https://edge.alluremedia.com.au/m/g/2017/01/star-wars-hologr...

That requires

1. The imagine coming "out" of the screen such that you can even see the image at 90º to the projector

2. The image occluding the physical background.

As far as I understand, such a thing is impossible as seen in the still above (i.e. from a single projector), but can be fakes by using stuff in the air to scatter the light, like this research project (1) or this not-great version that uses fog (2)

(1) https://www.sciencemag.org/news/2018/01/princess-leia-hologr...

(2) http://www.leiadisplay.com/

Re: Colossal Holograms

#77

Post by vilhelm_s »

m3kw9 wrote: post #70

Looks like 3D inside a tv. It ain’t holographic unless it projects enough for you to touch thru it.

I think it can do both, the gif above the caption "It’s the truly futuristic, deeply immersive display we’ve always dreamed of" appears to project in front of the screen.

Re: Colossal Holograms

#78

Post by vilhelm_s »

pluma wrote: post #57
tyingq wrote: post #37

Earlier quoted context omitted.

This looks like "coming out of the screen" to me: https://miro.medium.com/max/1200/1*-nm0AvcydVzyhgDFdh6V2g.gi... Do you mean the effect doesn't work with back to front motion? Like that pan can't start in the back and move forward?

Too late for an edit but I was going by what was shown in the video, which very much didn't look it could do that. That said, that's still basically "3D but without glasses", not exactly the Holodeck "hard light" future tech many people think of when they hear "real hologram".

I mean, a real hologram (made using light interference) is also not Holodeck hard light.
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