Video-speed detection of the absolute position of a light point on a large-area photodetector based on luminescent waveguides.
A large-area photosensor is presented that uses the coupling of light into the planar waveguide mode of a polycarbonate foil by luminescent dyes to extend the active area of silicon photodiodes attached to the surface of the foil in a regular pattern. The photodiode signal is directly related to the distance between the point where light is coupled into the foil and the photodiode, thus enabling a precise recovery of the position of a localized light signal hitting the foil. We present a large-area device that can trace the movement of a light point generated by a laser pointer hitting its surface.
Koeppe
Robert
R
Department of Soft Matter Physics, JKU Linz, Altenbergerstr 69, A-4040 Linz, Austria. robert.koeppe@isiqiri.com
Neulinger
Anton
A
Bartu
Petr
P
Bauer
S
S