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VOLUMETRIC 3D DISPLAYS

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Holographic. Can be made images with microscopics resolutions. Creates real 3D image ... or other viewing aids. Image displayed on a 2D medium. Holographic ... – PowerPoint PPT presentation

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Title: VOLUMETRIC 3D DISPLAYS


1
VOLUMETRIC 3D DISPLAYS
GROUP H
2
Group Members
  • Stephen Brown
  • Pavel Bures
  • George Brown
  • Thomas Fields
  • Vit Letal

3
Introduction to Volumetric Displays
  • Topics
  • Introduction
  • How it Works
  • Hardware / Software
  • Problems
  • Applications
  • Other Types of 3D Display

4
Introduction
  • Images created occupy a true volume

5
Autostereoscopic
  • Providing pair of 2-D images ,each eye sees only
    the image intended for it .
  • Depends on geometry of display to do it
  • Polarization filters
  • Head tracking
  • It is up to our brains to construct the true 3D
    scene.
  • Not everybody is able to construct this picture

6
Holographic
  • Can be made images with microscopics resolutions.
  • Creates real 3D image
  • Uses monochromatic lasers gt images of one
    colour.
  • Needed big computer power for true 3D animations.
  • Only statical images created so far.

7
Volumetric 3D Display
  • Generates an authentic 3D image.
  • 2 different types
  • Swept-volume
  • Static volume

8
Volumetric 3D Display-Static volume
  • Static-volume type
  • Cube of glass with some rare-earth elements.
  • Initialized by intersection of two infra-red
    laser beams.
  • Based on excitation of electrons.
  • Prototype - by Elizabeth Downing and her
    colleagues at Stanford University.

9
Volumetric 3D Display- Swept volume
  • Display screen itself is flat.
  • Provide high frequency sequences of 2D images on
    flat screen.
  • Rotating screen - Perspecta
  • Varifocal mirror

10
Volumetric 3D Display- Varifocal mirror
  • mirrored membrane of varying optical power
  • Problem - synchronization with CRT 2D display

11
Volumetric 3D Display (Perspecta)
  • Problems
  • Fail to provide some visual depth cues
  • Occlusion
  • Shading
  • Texture Gradients

12
How does it work?
13
Applications
  • Air Traffic Control
  • Submarine Navigation
  • Medical Imaging
  • US Army Research Labs
  • CAD / CAM
  • Scientific Visualisation

14
Other Types of 3D Display
  • Autostereoscopic
  • Displays a spatial image to the viewer
  • No need for goggles, glasses or other viewing
    aids
  • Image displayed on a 2D medium
  • Holographic
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