23 votes

How would a holographic “touch-screen” work?

Gesture recording There's a quite workable solution, without beams crossing the room. You project the hologram as usual, in front of the person. Then you'd have video cameras on the other end, ...
Goodies's user avatar
  • 14.9k
21 votes
Accepted

Would it be possible to build a powerless holographic projector?

Mirrors work fine ...as the Norwegian town of Rjukan has already demonstrated. Read about it here. The villages of Rjukan, Norway, and Viganella, Italy, are both situated in deep valleys where ...
MichaelK's user avatar
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12 votes

Would it be possible to build a powerless holographic projector?

Take a credit card, or something else with an hologram in it, and put it under the sun. You see the hologram without needing a power supply for the object, because the hologram has already been ...
L.Dutch's user avatar
  • 287k
9 votes

How would a holographic “touch-screen” work?

Update: There are a few conversations that I've had to repeat, so I figured I'd include the responses here. A hologram projector isn't a real thing. We see this so much in movies and television that ...
Robert Rapplean's user avatar
6 votes

How would a holographic “touch-screen” work?

Visual theremin The theremin is a no-contact musical instrument which is "played" by moving hands within an oscillating electrical field. This electrical "pitch field" is picked up ...
Ottie's user avatar
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3 votes

How would a holographic “touch-screen” work?

We actually have tech like a " projected laser Keyboard" and sight based key selection (Done by having a camera that notes where your eye is looking to manipulate the interaction). However, ...
hszmv's user avatar
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3 votes

How would a holographic “touch-screen” work?

Sonic resistance In addition to the hologram, have a sound machine nearby that can make waves of sound. It carefully constructs waves of sound to resist people's hands when they touch them, like a ...
Nepene Nep's user avatar
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3 votes

How would a holographic “touch-screen” work?

Detect the heat signature of fingers Humanity is already developing 3D thermal imagine, though inelegant compared to what you're trying to do, the premise is simple. Detect the tips of people's ...
JBH's user avatar
  • 122k
2 votes

How would a holographic “touch-screen” work?

Ultrasonic haptic feedback A phased array of ultrasound emitters can produce tactile sensations (vibrating a point or area on your fingers/hand). There's ongoing research in this area, and there ...
jeffB's user avatar
  • 612
2 votes

How would a holographic “touch-screen” work?

a technology like that already exist, all be it it... not working well yet.see laser keyboard basically you can get a "touch" detection with an IR censor that tell you where the screen has ...
shas's user avatar
  • 1,067
2 votes

How would a holographic “touch-screen” work?

Eye focus tracking The system tracks the user's eyes and can tell exactly where they are focusing. The hand motions are simply an aid to this. e.g. the eyes focus on the object you wish to manipulate, ...
komodosp's user avatar
  • 9,479

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