VOLUMETRIC 3D DISPLAYS

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VOLUMETRIC 3D DISPLAYS
GROUP H
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Group Members

• Stephen Brown
• Pavel Bures
• George Brown
• Thomas Fields
• Vit Letal

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Introduction to Volumetric Displays

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

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Introduction

• Images created occupy a true volume

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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

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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.

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Volumetric 3D Display

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

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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.

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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

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Volumetric 3D Display- Varifocal mirror

• mirrored membrane of varying optical power
• Problem - synchronization with CRT 2D display

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Volumetric 3D Display (Perspecta)

• Problems
• Fail to provide some visual depth cues
• Occlusion
• Shading
• Texture Gradients

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How does it work?
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Applications

• Air Traffic Control
• Submarine Navigation
• Medical Imaging
• US Army Research Labs
• CAD / CAM
• Scientific Visualisation

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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