Constitution

  
Figure 1: Structure of a desktop environment for electronic circuit inspection by augmented reality.

  
Figure 2: A view of the system.

Figure 1 and 2 show a structure of this system and its outlook, respectively. This system consists of the following items.

• Camera
  Two cameras are located both side of working area to avoid occluding object by worker`s arm.
• PC
  This PC roles an important part of this system. It stores an AR manual (see chapter 2) and calculates the target position taken from a camera image to generate display information of virtual image. These are processed in real time.
• Display
  Graphical instructions are displayed.
• Half mirror
  The graphical instructions generated by the display and the real image of the board are merged optically by this half mirror.

  The electronic circuits to be inspected are planar print circuit boards. Therefore, if it corresponds the light path length to the display with the light path length to the real circuit boards, the worker can watch them at same plane.