Fig. 7.

An illustration of consistent registration performance across a wide range of distances for the on-axis HMD system. Five identical white bar targets were placed at 3, 4, 5, 6, and 7 feet from the HMD system. The registration was purposely shifted down to provide a simultaneously clear view of the real objects and their virtual edge images. This picture was captured with a digital camera aimed through the HMD. Five identical gauges depicted next to the white bars show that the registration was consistent from 3′ to 7′. Note, however, that the edges are dimmer than the white target in this implementation.