Haptic Holography

Mike Huselton

The basic tech behind the Star Trek Holo Suite, Holograms that you can both see and touch, projected in 3D space, takes its first baby steps.

http://gizmodo.com/5044624/ultrasound-haptic-devices-can-project-tactile-shapes-into-thin-air

You can find better demo links, work for it. Like this:



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JMH

Bobb Fwed

very cool. We need one controlled by a Propeller now!

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April, 2008: when I discovered the answers to all my micro-computational-botherations!

Tim-M

This is interesting stuff!

I don't understand how the image is projected... is it onto the black background or is it in mid-air as implied? If it is in mid-air, how so? It has to have something to project onto... even if it's just particles such as dust, right?

Tim

Bobb Fwed

A curved mirror makes it look like it is one location, even though it isn't...it is all about perspective.

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April, 2008: when I discovered the answers to all my micro-computational-botherations!

Bobb Fwed

Take a look at this for more info on how the 3D "holograph" effect is made: www.youtube.com/watch?v=Jd3-eiid-Uw

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April, 2008: when I discovered the answers to all my micro-computational-botherations!

SciNemo

Although Johnny Lee's wiimote head tracking system creates a similar effect to that of what was used for the tangible holograph, the actual techniques are different. The tangible holograph display used a lens to fake a 3d object floating in mid air, while johnny lee's design uses head tracking. The tangible holograph display would appear 3 dimensional to anybody looking at it while johnny lee's would only appear 3d to the person wearing the head tracking rig (up to two people with 1 wiimote).

I think something like this is possible with the propeller, but you would need a dsp to handle all those ultrasonic emitters, and graphics would be extremely simple, unless you added ram or another propeller.

Maybe something like this:
{10x10 array of ultrasonic emitters+dsp}+propeller+3d object display code+{head tracking rig+propeller (overkill, maybe atmega168 or similar)}

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Not the fish.
sites.google.com/site/bitwinproject/

Graham Stabler

This thing has a pair of wiimotes above the screen so they must be doing something, perhaps just so you can film these affects.

The concave mirror explanation is basically no explanation at all.

Amazed by those ultrasonic transducers, pretty cool.

Graham

SamMishal

Graham Stabler said...
The concave mirror explanation is basically no explanation at all.

A concave mirror has a focal point that is infront of the mirror. So light projected onto the mirror
will reflect back out and focus on the focal point. Of course it will also continue onwards to your eyes.

However your eyes will perceive the light as if it is eminating from the focal point. So your eyes will think
that the object is at that focal point.

Thus the effect is to have it appear as if an object is floating in mid air infront of the mirror.

If the focal point is a few feet infront of the mirror you will also tend to not see the mirror
in focus and thus you will tend to ignore the mirror and therfore you will think the object is
just there and the illusion is complete.

See this diagram


Post Edited (SamMishal) : 8/9/2009 6:13:01 PM GMT

Cole Logan

I actually saw a simuler effect with a with a metal sphere and a hole on the top of it. What ever was placed in the sphere looked to be floating above the hole.

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