3 ms·

I could be wrong, but IMO you and bane are both confusing "holography" with "3D display", and/or "display that involves depth". The author of the article made a

I could be wrong, but IMO you and bane are both confusing "holography" with "3D display", and/or "display that involves depth". The author of the article made a similar mistake, and unfortunately a lot of commercial products are mislabeled as "holographic", so this is unsurprising. As bane said, holography is a very specific thing. Most of the products I'm aware of today that claim to be "holographic" are things like head-up displays and red-dot gun sights. They use optics to make it appear as though a 2D image is appearing some distance behind the display surface. It's a clever, useful effect, but it is not holographic. I think the author of the article is also leaving out one of the main interesting potential uses of depth-sensing cameras, which is to feed the output into a 3D printer. You don't need a holographic display (or even a faux-holographic depth display) for that.

cnahr 12y ago
My use of the term "holographic" was taken directly from Ng's dissertation, near the end of section 3.7: "...Camahart showed that holographic stereograms can be synthesized from light fields." Whether he's strictly correct with his use of the term I don't know. Ng also mentions working with Zebra Imaging on printing such "holograms" [sic], so that's certainly a possible application. I'm not sure a lot of consumers would be interested in that, though, compared to simply showing pictures.
bane 12y ago
Actually the display I'm talking about wasn't a 3d display it was a wearable holographic HUD I saw at a DARPA demo day. The use-case for these kinds of displays is pretty much to ensure a graphic on the display stays in focus no matter where your eyes focus, or where they are relative to the display by producing a hologram of the display. It's subtly different from similar see-through HUDs because you don't have to keep changing your focus back and forth to the HUD. The DARPA guy I was talking to wasn't working on the display but on some other bits of the HUD and didn't know all the details about how it worked sadly. Looking for it later I think it was a holographic waveguide technology. http://www.dodsbir.net/sitis/archives_display_topic.asp?Bookmark=37520 http://www.dodsbir.net/sitis/archives_display_topic.asp?Book...

cnahr 12y ago

My use of the term "holographic" was taken directly from Ng's dissertation, near the end of section 3.7: "...Camahart showed that holographic stereograms can be synthesized from light fields." Whether he's strictly correct with his use of the term I don't know. Ng also mentions working with Zebra Imaging on printing such "holograms" [sic], so that's certainly a possible application. I'm not sure a lot of consumers would be interested in that, though, compared to simply showing pictures.

bane 12y ago

Actually the display I'm talking about wasn't a 3d display it was a wearable holographic HUD I saw at a DARPA demo day. The use-case for these kinds of displays is pretty much to ensure a graphic on the display stays in focus no matter where your eyes focus, or where they are relative to the display by producing a hologram of the display. It's subtly different from similar see-through HUDs because you don't have to keep changing your focus back and forth to the HUD. The DARPA guy I was talking to wasn't working on the display but on some other bits of the HUD and didn't know all the details about how it worked sadly. Looking for it later I think it was a holographic waveguide technology. http://www.dodsbir.net/sitis/archives_display_topic.asp?Bookmark=37520 http://www.dodsbir.net/sitis/archives_display_topic.asp?Book...