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There's no such thing as holograms. Not until we discover new physics. These are Pepper's Ghost, a simple lighting trick [0]. [0] https://en.wikipedia.org/wiki

There's no such thing as holograms. Not until we discover new physics. These are Pepper's Ghost, a simple lighting trick [0]. [0] https://en.wikipedia.org/wiki/Pepper%27s_ghost https://en.wikipedia.org/wiki/Pepper%27s_ghost

toast0 6y ago
This isn't holograms (and neither are the looking glass or Sony's spatial display thingie), but holograms exist, generally film based.
ceejayoz 6y ago
Might wanna let the Nobel Committee know that. https://en.wikipedia.org/wiki/Dennis_Gabor https://en.wikipedia.org/wiki/Dennis_Gabor
- qchris 6y ago
  Side note: Dennis Gabor's "Personal life" section seems to have a strange bit of editorialization. > On 8 August 1936 he married Marjorie Louise Butler with whom he lived in a harmonious marriage. They did not have any children. I'm glad they lived in a harmonious marriage, I guess? I am really curious why/how that particular detail managed to make it onto Wikipedia. Random edit? Part of the phrasing in a biography or his will? Someone who knew them personally that wanted to make that clear?
  - haram_masala 6y ago
    Maybe they sang a lot.
  - cma 6y ago
    Sounds like typical language of an obituary, maybe it was lifted from one.
  - aaron695 6y ago
    It's often useful to check the other language wikis that are relevant for more info. (here you replace the en with hu) It's cited from here - "harmonikus házasságban" https://dokutar.omikk.bme.hu/archivum/gabor/htm/gaborkronol.htm https://dokutar.omikk.bme.hu/archivum/gabor/htm/gaborkronol.... Why they said it.......
- aphextron 6y ago
  Printed holograms, sure of course. But projected holography akin to Star Wars is pure science fiction.
  - cycomanic 6y ago
    Well I would argue that holograms are always a projection, that is you need a reference beam to reconstruct your image beam. But I agree the star wars "holograms" were never holograms but more 3D point cloud projections. Now you could say they do exist, see e.g. laser light shows, they are just by far not as impressive as the star wars movies.
chabad360 6y ago
A certain Dr. Smalley would be very insulted to hear that, as he's pioneered a pretty good method for making those: https://www.researchgate.net/publication/322723302_A_photophoretic-Trap_volumetric_display https://www.researchgate.net/publication/322723302_A_photoph...
- skunkworker 6y ago
  Video for anyone interested. https://youtu.be/1aAx2uWcENc https://youtu.be/1aAx2uWcENc "In simple terms, we’re using a laser beam to trap a particle, and then we can steer the laser beam around to move the particle and create the image"
pantelisk 6y ago
If you want to see a "real hologram", check our the mirascope. It is a children's toy, that consists of 2 parabolic mirrors, aligned in such a way, so that when light rays converge at its top, the illusion of an object that is not there appears. (I guess this meets the definition of hologram, except it is not created out of a projector but from an actual physical object) [1] http://physicstoys.blogspot.com/2018/02/the-mirascope.html http://physicstoys.blogspot.com/2018/02/the-mirascope.html
- dTal 6y ago
  That is not a hologram, that is a reflection; the object is, in fact, there. If that is a hologram, then so is the person you see in your bathroom mirror.
tootie 6y ago
Lenticular displays like Looking Glass are pretty neat. They don't go 360 but they create images with real depth by layering transparent displays. https://lookingglassfactory.com/ https://lookingglassfactory.com/
tgsovlerkhgsel 6y ago
The key question is whether it's 2D or 3D. If it's 2D (which I understand regular screen-plus-mirror things to be), then it's not much different from a screen, except that it takes up much more valuable floor space and is going to be a lot more expensive, while also horribly breaking immersion if you're nearby. If the frame/box really add much immersion, then some solution that can sit flat on a wall while still appearing to be a cabin (recessed into the wall) would likely be a lot more successful, as it can "create" instead of eating real estate.

toast0 6y ago

This isn't holograms (and neither are the looking glass or Sony's spatial display thingie), but holograms exist, generally film based.

ceejayoz 6y ago

Might wanna let the Nobel Committee know that. https://en.wikipedia.org/wiki/Dennis_Gabor https://en.wikipedia.org/wiki/Dennis_Gabor

qchris 6y ago
Side note: Dennis Gabor's "Personal life" section seems to have a strange bit of editorialization. > On 8 August 1936 he married Marjorie Louise Butler with whom he lived in a harmonious marriage. They did not have any children. I'm glad they lived in a harmonious marriage, I guess? I am really curious why/how that particular detail managed to make it onto Wikipedia. Random edit? Part of the phrasing in a biography or his will? Someone who knew them personally that wanted to make that clear?
- haram_masala 6y ago
  Maybe they sang a lot.
- cma 6y ago
  Sounds like typical language of an obituary, maybe it was lifted from one.
- aaron695 6y ago
  It's often useful to check the other language wikis that are relevant for more info. (here you replace the en with hu) It's cited from here - "harmonikus házasságban" https://dokutar.omikk.bme.hu/archivum/gabor/htm/gaborkronol.htm https://dokutar.omikk.bme.hu/archivum/gabor/htm/gaborkronol.... Why they said it.......
aphextron 6y ago
Printed holograms, sure of course. But projected holography akin to Star Wars is pure science fiction.
- cycomanic 6y ago
  Well I would argue that holograms are always a projection, that is you need a reference beam to reconstruct your image beam. But I agree the star wars "holograms" were never holograms but more 3D point cloud projections. Now you could say they do exist, see e.g. laser light shows, they are just by far not as impressive as the star wars movies.

chabad360 6y ago

A certain Dr. Smalley would be very insulted to hear that, as he's pioneered a pretty good method for making those: https://www.researchgate.net/publication/322723302_A_photophoretic-Trap_volumetric_display https://www.researchgate.net/publication/322723302_A_photoph...

skunkworker 6y ago
Video for anyone interested. https://youtu.be/1aAx2uWcENc https://youtu.be/1aAx2uWcENc "In simple terms, we’re using a laser beam to trap a particle, and then we can steer the laser beam around to move the particle and create the image"

pantelisk 6y ago

If you want to see a "real hologram", check our the mirascope. It is a children's toy, that consists of 2 parabolic mirrors, aligned in such a way, so that when light rays converge at its top, the illusion of an object that is not there appears. (I guess this meets the definition of hologram, except it is not created out of a projector but from an actual physical object) [1] http://physicstoys.blogspot.com/2018/02/the-mirascope.html http://physicstoys.blogspot.com/2018/02/the-mirascope.html

dTal 6y ago
That is not a hologram, that is a reflection; the object is, in fact, there. If that is a hologram, then so is the person you see in your bathroom mirror.

tootie 6y ago

Lenticular displays like Looking Glass are pretty neat. They don't go 360 but they create images with real depth by layering transparent displays. https://lookingglassfactory.com/ https://lookingglassfactory.com/

tgsovlerkhgsel 6y ago

The key question is whether it's 2D or 3D. If it's 2D (which I understand regular screen-plus-mirror things to be), then it's not much different from a screen, except that it takes up much more valuable floor space and is going to be a lot more expensive, while also horribly breaking immersion if you're nearby. If the frame/box really add much immersion, then some solution that can sit flat on a wall while still appearing to be a cabin (recessed into the wall) would likely be a lot more successful, as it can "create" instead of eating real estate.