Abstract: A number of helmet mounted displays have been designed in recent years. The majority of these designs have been dismissed on the grounds of safety when considering the optical configuration. The principle of the design discussed in this paper is that of a display projected using the visor, where it acts not only as the display visor but also provides windblast, laser, and nuclear flash, protection. The display is projected by means of a holographic combining element on the visor. This paper addresses the design and manufacture of the holographic components employed, discussing the use of DuPont photopolymer material for this application. Off-axis holograms configured around the geometry of the head/helmet, give a wide field of view, with good eye relief. Well defined reflective and transmissive properties of the hologram are required to give full system compatibility. The resultant system does not compromise the safety of the user, whilst maintaining a fully integrated man/machine interface, i.e. low mass, and manageable center of gravity.!6
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