Tom Fellmann

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Investigating various virtual reality (VR) tools, we have described main components for a generic VR Engine. In this paper, we discuss the system architecture of a VR Engine (VaiR), and demonstrate the basic elements of this generic VR programming interface. The VaiR Engine integrates VR hardware and software within a graphics Application Programming(More)
A medical examination and questionnaire in various office workplaces (N = 295) shows that in intensive work at visual display terminals rheumatic and asthenopic disorders are very frequent. Muscle pain and eye complaints are correlated. The incidence of eye disorders and visual acuity are related to lighting conditions (local and temporal oscillation of(More)
An apparatus for measuring the sharpness, the oscillation degree and the stability of characters of 8 different VDTs were developed. Furthermore the contrast of luminances between the essential surfaces was measured. The following results were observed: 2 VDTs had good ergonomic qualities, one was only sufficient and 5 VDTs had insufficient ergonomic light(More)
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