Abstract
In this paper, we present a new user–display interaction technology
in which a laser-pointer is used to select objects on a display screen. In
this interaction technology, the user points to the object on the display,
using a laser-pointer to make a selection. This allows interaction from a
distance, which is an advantage over state-of-the-art touchscreen technologies.
This interaction technology will be referred to as “Remote-Touch”.
It consists of a laser-pointer, a transparent micro-structured light-guiding
substrate, and position-sensitive detectors (PSDs). The substrate, which is
patterned with a micro-structure of pyramid-shaped indentations, is put in
front of the display. When the laser-light hits the display the micro-structure
in the polymethyl methacrylate (PMMA) substrate reflects part of the laser-light
to the sides of the display screen. The PSDs at the edge of the PMMA substrate
read-out the position of the laser-spot. This paper focuses on the optical
performance of the micro-structured PMMA substrate.
© 2007 IEEE
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