The Long-Range Light Pen as a Head-Based User-Computer Interface: Head-Mounted “Sights” versus Head Positioning for Computer Access by the Disabled

Abstract

The long-range light pen was developed as a means for enhancing the human-computer communication abilities of individuals incapable of keyboard use. The technique was also seen as having application as an auxiliary means of communication for instances where a keyboard was the primary communication input channel. One drawback associated with the particular device is that it is limited to use with c.r.t. displays, suggesting that different technologies will be required for interface with other display types. This paper presents preliminary findings from the first of several phases of experimentation intended to determine appropriate design criteria both for display formatting and for control algorithms.

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