HMSD

Head Mounted XR Sight & Displays

Acronyms and uses

XR, VR, AR, MR, CPT, OST… : significations

XR = Extended Reality : generic term for all types of representation.

This covers:

  • VR  = Virtual Reality
    • The scene is a purely synthetic image.
  • AR = Augmented Reality 
    • Information is embedded in the scene view (text, icons, etc.).
  • MR : Mixed Reality 
    • The information is in 3D in the scene (at the size of the objects in the scene, i.e., we have knowledge of the 3D scene (we can represent a man in dotted lines hidden behind a real tree in the scene).

There are two ways to perceive/display the real environment:

  • Camera Pass Through (CPT) ou Video Pass Through (VPT) : the screen blocks the view in front of the eyes; images are displayed that come either from cameras filming a real scene or from pure computer-generated images.
  • Optical See Through (OST) : the real scene is seen transparently through a visor at the same time as the augmented reality information.

« eSAS-CPT » helmet (Camera Pass Through)

« eSAS-OST » helmet (Optical See-Through)

Applications

CPT or OST : 360° threat detection (lighter and better balanced than JVNs)

CPT

Target, monitor and be aware of the situation.
Allows you to SEE FAR, AT NIGHT, AT 360°.

  • High-quality computer-generated image overlay (including maps, mission texts, etc.)
  • Overlay of multiple video streams (thermal, weapons system, etc.)

OST

Off-road driving, discreetly, in all conditions.
Allows you to SEE THE REAL SCENE ENHANCED.

  • Off-road driving at night as well as in daylight
  • Mix of the real scene with additional information
  • Wide-angle sensors (80°) in pitch darkness (NATO level 5)
  • Visible/thermal fusion

In summary

The CPT prioritizes the quality of computer-generated images or zoomed camera views.

  • Brightness and resolution of displayed images and embedded elements
  • Simulator mode for training
  • Lower cost and maintenance
  • Robustness

OST prioritizes the quality of perception of the real scene.

  • Direct view of the scene through the visor
  • No risk of motion sickness
  • Comfort
  • No need for user optical adjustments (IPD, diopters, etc.)