Head-Mounted Displays

Three HMD's were used during the course of the dissertation experiments. The below specification are taken from [96]. Specifications sometimes vary slightly depending on the source.

For the reported presence experiments described in Chapter 5, the Division dVisor was used. The dVisor features 294x141 pixels, horizontal FOV 105$^{\circ}$, vertical FOV 41$^{\circ}$, and 46$^{\circ}$stereo overlap. It weighs 8.8 pounds.

The presence measure experiments described in Chapter 4 used the Virtual Research VR4 HMD. The VR4 has the advantages over the dVisor of higher resolution; of being much less heavy and bulky; and of being light-tight. Unfortunately, the VR4 has a lower FOV than the dVisor. The VR4 features 247x230 pixels, horizontal FOV 48$^{\circ}$, vertical FOV 36$^{\circ}$, and 100% stereo overlap. It weighs 33 ounces.

The experiments reported in Chapter 6 made use of the Virtual i-O i-glasses! VTV/VPC. This HMD features 263x230 color pixels and a 30$^{\circ}$ horizontal by 24$^{\circ}$ vertical FOV with 100% overlap between the two eyes. It weighs 8 ounces. The image is displayed on a semi-transparent half-silvered mirror. The half-silvered mirror has the crucial advantage (for the experiments reported in Chapter 6) of allowing both a see-through and occluded mode. In the see-through mode, the image on the half-silvered mirror is overlaid on the external environment. By mounting an occlusion behind the mirror, the HMD can also be used in a mode in which only the display itself is visible.

Human Interface Technology Lab

Human Interface Technology Lab