Miniature image sources are now appearing in a variety of technologies that have the potential for application to military head mounted displays. These technologies take the form of emissive, transmissive, reflective, and scanning display configurations. Each of these technologies have particular characteristics that make them attractive for use in head mounted display systems. The diversity of military applications result in varying set of requirements that must be considered during the image source selection process. However, initial selection of a new technology for head mounted applications involves the evaluation of a few basic characteristics. A candidate technology should be adaptable to either direct-view or see-through display systems and have an appropriate size, resolution, luminance, and required power.