Principle of Operation: Mirrors

The HUD incorporates 4 mirrors. These mirrors reflect the display content onto the windshield. Three of the mirrors are curved. These mirrors adapt the display content onto the screen.

Fig 1: Identifying Mirrors

Courtesy of BMW OF NORTH AMERICA, INC.

This flat mirror determines the size and distance of the HUD projection. The curved mirrors are made of plastic while the flat mirror is made of glass.

The projected HUD image content appears at a distance of approximately 2.2 meters (7.2 feet) from the eye.

Fig 2: Identifying Principle Of Operation

Courtesy of BMW OF NORTH AMERICA, INC.