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:forbidden:OUTPUT DEVICES:forbidden: (HEPTIC FEEDBACK:check: =In Greek…

- - - - :check:azimuth cues
      - :check:elevation cues
      - :check:effect of pinna
    - - 3 variables
        
        :check:azimuth
        
        :check:range
        
        :check:elevation
- - - - Tracked and wireless
      - Untracked and wireless
    - - no cables if head position is not tracked
      - light and ergonomic
      - work well with large volume displays
      - allows full screen resolution 1280x1024
    - - require special CRT : 2x hardware refresh rate
      - require direct line of sight for IR controller;
      - lose 2/3 of image light intensity through LCD filtering
      - different viewing metaphor “through the window”.
  - - - tiled displays place smaller images side-byside
      - Images need to have overlap, to assure continuity
      - Using a single projector on a large wall
      - Overlap from two projectors means
        intensity discontinuity
      - Accommodate more users
      - Projectors need to modulate intensities to dim their
        light for overlap pixels
    - - Old technology is CRT-based(analog) 3 projector tubes (R, G, B)
      - Requires special "fast green" coating to avoid fogging due to fast switching ( at 120 Hz)
      - Suffer from low luminosity problems (200-300 lumens)
    - - Advantages
        
        Accommodate more users
        
        Give users more freedom of motion
      - Disadvantages
        
        To have equal numbers of pixels/unit are – more projectors
        
        resolution is much lower than for CRTs
        
        Large cost
    - - 800:1 contrast ratio
      - Driven by Barco Galaxy Stereo DLP projectors 3000 Lumens
      - 1400 x 1050 pixel resolution
      - Such as BARCO Trace
      - active stereo glasses
- - - - :star:Provides real-time information
      - :star:object weight,and inertia.
      - :star:Resists the user’s contact motion & can stop it
      - :star:More difficult to implement
    - - :check:Contact motion & cannot stop the user from moving through virtual surfaces
      - :check:Contact surface geometry, virtual object surface
        roughness, slippage, and temperature
      - :check:Convey Real-time information
      - :check:Easier to implement than force feedback.
  - - - :smiley:Merkel’s disks
      - :smiley:Pacinian corpuscles
      - :smiley:Rufini corpuscles
      - :smiley:Meissner’s corpuscles