3D Visualization Systems-snippet

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Keywords: 3D Displays, 3D monitors, 3D Glasses

Description:

Contents

Holographic display

Holo display


3D Displays

3D Display

Advantage: glass-free, no viewing aids
Disadvantage: might be fuzzy/with ghosting, fixed viewing point or tracker, split image - half resolution, usually only 1 user

  • SynthaGram Monitor by StereoGraphics Corporation, California
    Glass-Free 3D LCD monitor (20" model: 202 - $4,764) - multiple users at the same time / Multiple View (426x341)
  • C-s SeeReal 3D Displays by SeeReal Technologies, Germany: Try & Buy
    Glass-Free 3D LCD monitor with eye (C-i) or fixture (C-s) tracking - only 1 user at the same time / Two View with tracke
  • DTI 2018XLQ by Dimension Technologies Inc., New York: application list
    Glass-Free 3D LCD monitor (18" model - $4,295) - designed for 1 user, but multiple users at the same time allowed / Two View (620x1024)

Stereo 3D Display Comparison Chart

Shutter Glasses

3D Shutter Glass

Advantage: accurate (depends on the monitor performance), full resolution (Page Flipping - Crystal Eyes) or cheaper requirements (Sync Doubling - Neotek)
Disadvantage: high refresh rate/short persistence needed (expensive monitor, no LCD), each user requires glass

  • Wired SimulEyes by StereoGraphics Corporation, California
  • NuVision 3-D SPEX by MacNaughton Inc.
    Parallel port emitter, (pi-cell LC-panels up to 160Hz) no price posted ($50 ?) (review)

Shutterglasses Comparison Chart
Size and comfort Comparison Chart
Emitter Comparison Chart

Requires: CRT, DLP or Plasma display, does not work with LCD
Monitor refresh rate: minimum 100 Hz!, recommended 120 Hz or better with short persistence (average monitor max: 85 Hz)
Short persistence: P43 coating instead of P22. (Barco Grayscale monitor, 120 Hz?)
Monitor prices: $220 (NEC) - $420 (Sony) - $700 (Mitsubishi)
Glass switching times (dynamic-range) are about 2 ms (Ferro-Electric: 50 microsec)
Average LCD monitor response time: 20-50 ms, up to 85 Hz
Requires: stereo-ready graphics card and driver
Disadvantage: Turn off the fluorescent lights in the room to minimize the flicker

Polarizing glasses

3D Polarizing Glass

Advantage: accurate (circular-polarized), light glasses
Disadvantage: no LCD dispalys, each user requires glass, brightness loss

  • Monitor ZScreen 2000 by StereoGraphics Corporation, California
    Can be attached to any 19"-21" monitor, $2000 with 3 glasses + $250 for 5 additional polarized glass (cheaper glasses)


Cyberscope - one monitor mirror reflex

3D Cyberscope

Advantage: the cheapest ($179), the best stereoscopic picture quality of all systems (Mirror Reflex), good working range
Disadvantage: split image - half resolution, not very comfortable, only 1 user

  • Cyberscope from Simsalabim Systems, Inc., Sweden
  • ScreenScop ($270)
  • V5 from Rend386


Two monitor mirror/half mirror reflex

3D Mirror Reflex

Advantage: accurate, good resolution, the best stereoscopic picture quality of all systems (Mirror Reflex)
Disadvantage: bulky (2 mirrors and 2 monitors - but it can be LCD), not very comfortable, only 1 user


Wall projection with polarized glasses - IMAX like

3D Wall Projection with Polarized Glass

Advantage: great for presentation
Disadvantage: needs darker room, each user requires glass


Stereo Projection Table with shutter glasses

3D Stereo Projection Table


Head Mount Displays (HMD) / VR-helmet

3D Head Mount Display

Advantage: each eye has it's own small LCD/CRT screen - no ghosting, accurate
Disadvantage: usually small resolution, around 263 x 230, simulator sickness (article), only 1 user per glass - expensive

Color filter glasses (anaglyph)

3D Color Filter Glass

Advantage: compact format, easy to present
Disadvantage: ghosting, only grayscale, no colors, the negative paralax images are fuzzy

Color encoded glasses

Same as anaglyph, but different colors will be visible at different depths.

On a black background, red will appear closest, blue furthest, and the other colors will fall in-between according to their place in the rainbow (red, orange, yellow, green, blue).


Volumetric displays

3D Volumetric Display


Human Factors

  • The comfortable working range is found by controlled experiment. Typical range: -20cm to +50cm
  • Head Mounted Display: After 10 minutes of light exercise, the subjects were tested the results were alarming: measures of distance vision, binocular fusion and convergence displayed clear signs of binocular stress in a significant number of the subjects. Over half the subjects also reported symptoms of such stress, such as blurred vision. It is common for VDT users to be cautioned to look away from the screen occasionally to adjust their focal depth and to blink.
    (CyberEdge Journal issue #17, "What's Wrong with your Head Mounted Display")
  • Anything less than 100 fields per second (50 pairs per second, 50Hz per eye) is going to be uncomfortable for about 80% of the population
  • Ghosting and flicker

See Also

Created by: Csoma


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