This reminds me of the moving pictures on newspapers in Harry Potter
And famous wizard cards! Now maybe you can make your own.
Show HN: LitiHolo – a desktop 3D hologram printer that makes true holograms
81–90 of 123 posts
Re: Show HN: LitiHolo – a desktop 3D hologram printer that makes true holograms
#82Pretty neat. This seems like it actually exposes holograms the "hard" way, like you would do in a traditional setup (with lasers and beam splitters). A shortcut would be too directly print the very fine pattern that is on the holographic plate - basically a fourier transform of the image you want to encode. When I was in university we did a student's project on computer generated holograms and tried that - with a spe…
Recent research on improving the hologram computation with deep learning:
https://spectrum.ieee.org/tech-talk/computing/software/realt...
Re: Show HN: LitiHolo – a desktop 3D hologram printer that makes true holograms
#83Pretty neat. This seems like it actually exposes holograms the "hard" way, like you would do in a traditional setup (with lasers and beam splitters). A shortcut would be too directly print the very fine pattern that is on the holographic plate - basically a fourier transform of the image you want to encode. When I was in university we did a student's project on computer generated holograms and tried that - with a spe…
Recent research on improving the hologram computation with deep learning: https://spectrum.ieee.org/tech-talk/computing/software/realt...
I saw the article (it got a lot of attention talking about holograms), but I didn't see any actual holograms. I hope they get a 3D Hologram Printer so that they can actually output their computations.
And go MIT!
Re: Show HN: LitiHolo – a desktop 3D hologram printer that makes true holograms
#84This looks incredibly cool.
Just make sure you don't pull a stunt like Cricut recently has and piss off your entire userbase ;P
Re: Show HN: LitiHolo – a desktop 3D hologram printer that makes true holograms
#85This looks incredibly cool. Just make sure you don't pull a stunt like Cricut recently has and piss off your entire userbase ;P
Duly noted!
Re: Show HN: LitiHolo – a desktop 3D hologram printer that makes true holograms
#86This is a fascinating project. How do you actually generate a hogel? Are you positioning a reference surface? An SLM?
Re: Show HN: LitiHolo – a desktop 3D hologram printer that makes true holograms
#87This is a fascinating project. How do you actually generate a hogel? Are you positioning a reference surface? An SLM?
Yes, SLM. We use an LCD which is then focused to the hogel aperture with the object beam, where it meets the reference beam at the film to record the hologram for that hogel.
Re: Show HN: LitiHolo – a desktop 3D hologram printer that makes true holograms
#88Very interesting, but the 1 mm hogel size is a bit disappointing. Do you think you can improve this? How much?
Re: Show HN: LitiHolo – a desktop 3D hologram printer that makes true holograms
#89Very interesting, but the 1 mm hogel size is a bit disappointing. Do you think you can improve this? How much?
We currently have a 0.5x0.5mm resolution as a Kickstarter stretch goal.
Where things like lenticulars do have fundamental limits concerning depth vs resolution based on diffraction limits, holograms do not have similar constraints.
Ultimately, there is no reason these holograms can't reach resolutions similar to print (and better). Following the 3D printing market examples, we chose to start simple and then build on that as we progress in the future.
Re: Show HN: LitiHolo – a desktop 3D hologram printer that makes true holograms
#90Tangentially related, but does anyone have a trick to Google search for holograms without getting pages of lenticular/pepper's ghost items instead?
I'd like to buy a couple of pre-made holograms just to get a feel for them, but can't find anywhere selling them?