Visors are an important component in modern helmet-mounted displays (HMDs). In addition to their more conventional use as eye protection, they can be used as the final element in the optical system that relays visual information to the observer. To enhance their usefulness as the final optical element (as a beam splitter or image combiner), visors are sometimes coated to increase their reflectivity and improve the efficiency of the optics. However, pilots often object to the addition of reflective patches, indicating, among other reasons, that they decrease observed target contrast and, therefore, decrease target detection range. This paper examines the impact of the additional reflective coating on visual performance through a helmet-mounted display visor. It proposes design parameters based on the spectral nature of the coating that might make it more useful to both the HMD designer and to the HMD wearer. Finally, this paper examines visual phenomena that may affect visual performance through a coated visor.
Impact of helmet-mounted display visor spectral characteristics on visual performance
2002
11 Seiten, 6 Quellen
Conference paper
English
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