thetonestarr said:
Alterego-X said:
ph4nt said: Very cool, but i wouldn't really call it a hologram. |
This, people should stop calling every 3D simulation a "hologram". Hologram is a 52 year old invention, involving lazers, and photographs with added depth.
These are, on the other hand, volumetric display devices.
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Wrong. Definition and description of a hologram:
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Holography (from the Greek, ὅλος-hólos whole + γραφή-grafē writing, drawing) is a technique that allows the light scattered from an object to be recorded and later reconstructed so that it appears as if the object is in the same position relative to the recording medium as it was when recorded. The image changes as the position and orientation of the viewing system changes in exactly the same way as if the object were still present, thus making the recorded image (hologram) appear three dimensional.
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The only difference between what you described and this is the recording medium - classic holograms use a film for the medium, this uses air.
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You're even wronger.
"classic holograms" can be recorded in films, crystals, layers of plastic, many materials. Then in the most common applications you can see a recostructed image apparantly floating in mid-air by illuminating the recording medium with a laser or even with normal white light. Thus it makes no sense mixing up the recording material - "the film" - with the place where you see the apparent image - "the air".
The important part, technically, is that it records the interference between the waves of light scattered by the object and the unscattered beam, that's why in turn it can re-emit the information about the way an object looks from different directions. What Alterego said is basically true of the first kinds of holograms, though the dates are probably slightly different, I would have to look for them.
This one doesn't look like an hologram at all, merely a computer-generated image reflected by a concave mirror to give it an apparent spacial positioning. Notice how in the video you have a sphere and small drops, ie nothing that has 3d details revealed when you change your point of view. It's basically a 2d image, only its apparent positioning changes depending on your angle of observation because of the reflection in the curved mirror.
This is all fluff, anyway, because the image system is not what the presentation was about, nor were the wiimotes. A lot of people - including some of my collegues - use wiimotes as cheap blutooth enabled IR cameras in prototypes. The only important part was the software recognizing the hand position and controlling both the ultrasound jets and the display. Using the "holo" moniker when no real holography is used sounds like a cheap PR stunt.