Simulating the degraded visual environment: aeromedical assistance to an HMD research program

John S. Crowley; Phillip A. Johnson; Melissa H. Ledford; Clarence E. Rash

doi:10.1117/12.352844

12 July 1999 Simulating the degraded visual environment: aeromedical assistance to an HMD research program

John S. Crowley, Phillip A. Johnson, Melissa H. Ledford, Clarence E. Rash

Proceedings Volume 3689, Helmet- and Head-Mounted Displays IV; (1999) https://doi.org/10.1117/12.352844
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

In order to conduct helmet-mounted display (HMD) helicopter research flights in daylight, two versions of a simulated degraded visual environment (SDVE) were developed. SDVE-1 consisted of a tailored fire-retardant black cloth hood that is draped over the pilot's helmeted head and ventilated with a standard personal ventilator. While SDVE-1 successfully eliminated troublesome reflections, improved display readability, and was reasonably comfortable, pilots reported disturbing sensations of sensory deprivation and isolation. SDVE-2 combined colored filters on the hood and helicopter windscreen to allow the pilot a view of the cockpit interior while blocking light from the external environment. This system has been well accepted and has facilitated safe in- flight HMD research. Motion sickness remains an issue in HMD flight performance research.

Citation Download Citation

John S. Crowley, Phillip A. Johnson, Melissa H. Ledford, and Clarence E. Rash "Simulating the degraded visual environment: aeromedical assistance to an HMD research program", Proc. SPIE 3689, Helmet- and Head-Mounted Displays IV, (12 July 1999); https://doi.org/10.1117/12.352844

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