[tech-3d] holographic 3d

[Peter Abrahams <telscope@xxxxxxxxxx>]

(posted to photo3d & tech3d)  
This is an edited version of the story at:
http://www.wired.com/news/technology/0,1282,40264,00.html
 3D Projection Without the Glasses    by Leander Kahney  Nov. 17, 2000
at Comdex this year was a 3D display that projected volumetric images into
thin air... Dimensional Media set up a booth full of 3D displays that
projected images -- of objects such as cell phones or soda cans -- into
space in front of the viewer....the images at Comdex were often as vivid
and concrete as real objects.... does not require special glasses or any
kind of headgear. .... Dimensional Media, which is based in New York,
originally developed the technology for the military with funding from
Defense Advanced Research Projects Agency (DARPA).... The simplest version
of the technology is based on a system of mirrors and lenses. The object
whose image is being projected sits inside a pedestal, which projects the
object's light into space above the pedestal, where the image is reformed.
The effect is as if the object itself is hovering above the pedestal's
surface.  The company also demonstrated video versions of the technology,
which projected video images in 3D. ....a 3D teller-machine whose buttons
floated in space in front off the viewer. To activate the system's virtual
"buttons," the viewer simply pointed a finger at the image of the button.
The system uses a grid of infrared lights -- similar to systems in stores
that beep when a shopper enters -- to calculate the position of the
viewer's finger.  Dimensional Media said its images are already starting to
turn up in advertising displays at shopping malls and airports around the
world, and they should become quite common this year as more and more are
installed.  "We are really starting to sell these systems," said CEO Daniel
Pfeffer.  Dimensional Media said the company will start testing the first
volumetric 3D computer monitor early next year, which it hopes to sell to
medical providers, the military and CAD/CAM companies..... the monitor
could project X-Ray or NMR data in 3D, creating a precise image of the
inside of a patient's skull and the location of, say, a tumor. The display
could then overlay another image onto the patient's actual skull, showing
the surgeon the exact place to cut.

_______________________________________
Peter Abrahams   telscope@xxxxxxxxxx   The history of the telescope & 
   the binocular:   http://www.europa.com/~telscope/binotele.htm

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