4 ms·

So if you rotate your head 90 degrees the effect falls apart?

bane 6y ago
It's more like panning. If you step left right, the parallax effect persists, like walking around an object in a box on table. But if you try to go up/down it appears to rotate with you as the display doesn't have any fields vertically. It reminded me a lot of those "3d" pictures you can get that have a bunch of vertical sections at slightly different angles. They go back to maybe the 70s. There's a funny name for them that I can't quite remember. My understanding is that the "box" that sits on top of the display is purely cosmetic and helps sell the effect, and that the backboard of the display provides everything.
- objclxt 6y ago
  > There's a funny name for them that I can't quite remember. It’s lenticular printing - https://en.m.wikipedia.org/wiki/Lenticular_printing https://en.m.wikipedia.org/wiki/Lenticular_printing
- rowanG077 6y ago
  Lenticular printing?
numpad0 6y ago
Looking Glass is just lenticular sheet glued to LCD, same technology as cheap 3D postcards and stickers from the ‘90s made of vertical grated plastic that you tilt left and right and picture changes. Probably not even 3D. Acrylic block part is just a gimmick as well. But reportedly they execute that principle super well, gimmick part included, to the point it looks almost VR.
- etaioinshrdlu 6y ago
  The interesting thing is that if the lenticular lens is done with mini spheres instead of mini-cylinders, it should be possible to create a more fully holographic effect, given a sufficiently high-res base display. Basically a light-field camera in reverse. (I am sure they have thought of this by now ...)
  - nicd 6y ago
    Fovi3D (http://www.fovi3d.com/ http://www.fovi3d.com/) makes this kind of light-field display based on microlenses. One challenge here is the tradeoff between spatial and angular resolution. If you're generating a 4x4 lightfield starting with a 2160x1440 display, you only end up with 640x360 superpixels. The company I work for (https://www.leiainc.com/ https://www.leiainc.com/) makes a display that can switch between light field and 2D, so you can have the best of both worlds.
- kn0where 6y ago
  So, it's a much higher end Nintendo 3DS.
  - fenwick67 6y ago
    Except there are 45 images instead of 2.
    - daniel_reetz 6y ago
      Which means 45 pixels under each lenslet.
  - nimazeighami 6y ago
    No actually. The Nintendo 3DS uses parallax barrier technology, which is significantly newer technology than 100+ year old lenticular tech which powers Looking Glass and most 3D devices. That's why the Nintendo 3DS has such good image separation and reduced ghosting compared to cheap Chinese 3D phones and Rokit IO Pro 3D.
- VikingCoder 6y ago
  Yeah, that's not remotely accurate. 45 angles for each pixel: https://www.youtube.com/watch?v=-EA2FQXs4dw&t=4m18s https://www.youtube.com/watch?v=-EA2FQXs4dw&t=4m18s That's far more complicated than a lenticular sheet glued to LCD.
  - Miraste 6y ago
    Undoubtedly it's harder to build, but it is the same technology.
    - VikingCoder 6y ago
      Here's an article which discusses it, and it appears to explicitly not be lenticular. https://www.engineering.com/ARVR/ArticleID/17613/In-Through-the-Looking-Glass-Holographic-Startup-Wins-Big-on-Kickstarter.aspx https://www.engineering.com/ARVR/ArticleID/17613/In-Through-...
      - kaffeemitsahne 6y ago
        "There’s a lot more to the evolution, enough for a book on the subject, but if you had to create a list of what kinds of technology and methodology went into the Looking Glass (since they do not list it), it might look like this:" Pure speculation.
      - Miraste 6y ago
        That's not what that article says. It's speculation from before the display launched. Here is a later article in which the founder of the company says it is lenticular: https://hackaday.com/2018/11/21/supercon-alex-hornsteins-adventures-in-hacking-the-lightfield/ https://hackaday.com/2018/11/21/supercon-alex-hornsteins-adv... "since he happens to be head honcho at a holographic display company he can show us the result. Looking Glass Factory’s display panel uses a lenticular lens to combine the multiple images into a hologram, and is probably one of the most inexpensive ways to practically display this type of image."
  - VikingCoder 6y ago
- robocat 6y ago
  That’s wrong: technically it is nothing like the vertical grated sheet you see on cheap 3D posters etc. At 6 min 30 in https://www.youtube.com/watch?v=-EA2FQXs4dw https://www.youtube.com/watch?v=-EA2FQXs4dw they show the pixel sub mapping - and it isn’t just vertical bars. Edit: If they used a vertical grated sheet, there should be vertical lines at high contrast edges at a 45 pixel pitch. look at the green book at 6:22 and close-up at 6:27, and there seems to be vertical smear (not just what you might expect from horizontal smear). Example of a 3D lenticular print without the lenses to compare against: https://cdn.instructables.com/FKG/KDGQ/I0290WOV/FKGKDGQI0290WOV.LARGE.jpg?auto=webp&frame=1&width=1024&height=1024&fit=bounds https://cdn.instructables.com/FKG/KDGQ/I0290WOV/FKGKDGQI0290... from https://www.instructables.com/id/Computational-3D-Lenticular-Printing/ https://www.instructables.com/id/Computational-3D-Lenticular...

bane 6y ago

It's more like panning. If you step left right, the parallax effect persists, like walking around an object in a box on table. But if you try to go up/down it appears to rotate with you as the display doesn't have any fields vertically. It reminded me a lot of those "3d" pictures you can get that have a bunch of vertical sections at slightly different angles. They go back to maybe the 70s. There's a funny name for them that I can't quite remember. My understanding is that the "box" that sits on top of the display is purely cosmetic and helps sell the effect, and that the backboard of the display provides everything.

objclxt 6y ago
> There's a funny name for them that I can't quite remember. It’s lenticular printing - https://en.m.wikipedia.org/wiki/Lenticular_printing https://en.m.wikipedia.org/wiki/Lenticular_printing
rowanG077 6y ago
Lenticular printing?

numpad0 6y ago

Looking Glass is just lenticular sheet glued to LCD, same technology as cheap 3D postcards and stickers from the ‘90s made of vertical grated plastic that you tilt left and right and picture changes. Probably not even 3D. Acrylic block part is just a gimmick as well. But reportedly they execute that principle super well, gimmick part included, to the point it looks almost VR.

etaioinshrdlu 6y ago
The interesting thing is that if the lenticular lens is done with mini spheres instead of mini-cylinders, it should be possible to create a more fully holographic effect, given a sufficiently high-res base display. Basically a light-field camera in reverse. (I am sure they have thought of this by now ...)
- nicd 6y ago
  Fovi3D (http://www.fovi3d.com/ http://www.fovi3d.com/) makes this kind of light-field display based on microlenses. One challenge here is the tradeoff between spatial and angular resolution. If you're generating a 4x4 lightfield starting with a 2160x1440 display, you only end up with 640x360 superpixels. The company I work for (https://www.leiainc.com/ https://www.leiainc.com/) makes a display that can switch between light field and 2D, so you can have the best of both worlds.
kn0where 6y ago
So, it's a much higher end Nintendo 3DS.
- fenwick67 6y ago
  Except there are 45 images instead of 2.
  - daniel_reetz 6y ago
    Which means 45 pixels under each lenslet.
- nimazeighami 6y ago
  No actually. The Nintendo 3DS uses parallax barrier technology, which is significantly newer technology than 100+ year old lenticular tech which powers Looking Glass and most 3D devices. That's why the Nintendo 3DS has such good image separation and reduced ghosting compared to cheap Chinese 3D phones and Rokit IO Pro 3D.
VikingCoder 6y ago
Yeah, that's not remotely accurate. 45 angles for each pixel: https://www.youtube.com/watch?v=-EA2FQXs4dw&t=4m18s https://www.youtube.com/watch?v=-EA2FQXs4dw&t=4m18s That's far more complicated than a lenticular sheet glued to LCD.
- Miraste 6y ago
  Undoubtedly it's harder to build, but it is the same technology.
  - VikingCoder 6y ago
    Here's an article which discusses it, and it appears to explicitly not be lenticular. https://www.engineering.com/ARVR/ArticleID/17613/In-Through-the-Looking-Glass-Holographic-Startup-Wins-Big-on-Kickstarter.aspx https://www.engineering.com/ARVR/ArticleID/17613/In-Through-...
    - kaffeemitsahne 6y ago
      "There’s a lot more to the evolution, enough for a book on the subject, but if you had to create a list of what kinds of technology and methodology went into the Looking Glass (since they do not list it), it might look like this:" Pure speculation.
    - Miraste 6y ago
      That's not what that article says. It's speculation from before the display launched. Here is a later article in which the founder of the company says it is lenticular: https://hackaday.com/2018/11/21/supercon-alex-hornsteins-adventures-in-hacking-the-lightfield/ https://hackaday.com/2018/11/21/supercon-alex-hornsteins-adv... "since he happens to be head honcho at a holographic display company he can show us the result. Looking Glass Factory’s display panel uses a lenticular lens to combine the multiple images into a hologram, and is probably one of the most inexpensive ways to practically display this type of image."
- VikingCoder 6y ago
robocat 6y ago
That’s wrong: technically it is nothing like the vertical grated sheet you see on cheap 3D posters etc. At 6 min 30 in https://www.youtube.com/watch?v=-EA2FQXs4dw https://www.youtube.com/watch?v=-EA2FQXs4dw they show the pixel sub mapping - and it isn’t just vertical bars. Edit: If they used a vertical grated sheet, there should be vertical lines at high contrast edges at a 45 pixel pitch. look at the green book at 6:22 and close-up at 6:27, and there seems to be vertical smear (not just what you might expect from horizontal smear). Example of a 3D lenticular print without the lenses to compare against: https://cdn.instructables.com/FKG/KDGQ/I0290WOV/FKGKDGQI0290WOV.LARGE.jpg?auto=webp&frame=1&width=1024&height=1024&fit=bounds https://cdn.instructables.com/FKG/KDGQ/I0290WOV/FKGKDGQI0290... from https://www.instructables.com/id/Computational-3D-Lenticular-Printing/ https://www.instructables.com/id/Computational-3D-Lenticular...