Abstract: The Helmet-Mounted Display (HMD) concept is now widely used to meet the ever increasing mission requirements of modern helicopters especially for the very demanding tasks of night navigation, piloting, and use of armaments. However, a careful review of the system and ergonomic issues has to be undertaken in order to define a product that will be accepted by the aircrew and efficient in the battle field environment. Special attention must be paid in the specifications and implementation of the image sensors used to display the external scene in front of the eyes of the aircrew members. A technical approach, including various designs and the most significant performances, is described. !5
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