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5 August 2002 Impact of helmet-mounted display visor spectral characteristics on visual performance
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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 will examine the impact of the additional reflective coating on visual performance through a helmet-mounted display visor. It will propose 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 will examine visual phenomena that may affect visual performance through a coated visor.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter L. Marasco "Impact of helmet-mounted display visor spectral characteristics on visual performance", Proc. SPIE 4711, Helmet- and Head-Mounted Displays VII, (5 August 2002);


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