Head-Mounted Display (HMD)

	UP : Modern inexpensive HMD: The General Reality CE-200W. (Photo: General Reality Corp.)

• Two miniature displays

• Two image pipelines

• A motion tracker

The head-mounted display (HMD) was the first device providing its wearer with an immersive experience. Evans and Sutherland demonstrated a head-mounted stereo display already in 1965. The EyePhone from VPL Research was the first commercially available HMD (1989).

A typical HMD houses two miniature display screens and an optical system that channels the images from the screens to the eyes, thereby, presenting a stereo view of a virtual world. A motion tracker continuously measures the position and orientation of the user's head and allows the image generating computer to adjust the scene representation to the current view.

As a result, the viewer can look around and walk through the surrounding virtual environment.

Issues : Heavy

Consider carrying two displays around on your head.
+ Stereopsis is a strong
    3D queue
+ Existing Technology
+ Personal Display
- Obtrusive
- Narrow FOV
    (Tunnel Vision)
- Low Resolution
- Tracking
Currently the most popular 3-Dimensional (VR) display

What is the best way to get steroscopique view of two scenes : it is by giving one differente image to each eyes

To overcome the often uncomfortable intrusiveness of a head-mounted display, alternative concepts (e.g., BOOM and CAVE) for immersive viewing of virtual environments were developed.

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