Two-dimensional optical position sensor

E. Burstein, Aryeh M. Weiss

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations


A novel two dimensional optical position sensor based on confinement of luminescence within a flat panel is described. The basis of the sensor is a flat luminescent panel, such as those used in luminescent solar energy concentrators. In these concentrators, a glass or plastic plate is either coated or impregnated with a fluorescent material. The incident radiation produces luminescent emission, much of which is confined within the plate through total internal reflection, and is thus guided to solar cells which line the thin edges of the plate. In order to use such a plate as a position sensor, four detectors are placed along two orthogonal axes at the edges of the plate, and the plate is illuminated with a spot of light. The spot of light induces luminescence, which is detected by the four detectors. The detectors' output is processed to provide position information. Position sensors based on the above idea were constructed, using both microscope slides coated with a fluorescent dye, and poly(methyl methacrylate) plates which were cast in the presence of a fluorescent dye so that they exhibited fluorescence throughout their volume. The results showed that the detector output varied monotonically with position. This paper presents the results obtained to date, together with a theory which relates the detector output to position. Suggestions for the improvement of the sensor, particularly in the areas of materials processing and sensor geometry, are provided.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Number of pages8
StatePublished - 1995
Externally publishedYes
Event9th Meeting on Optical Engineering in Israel - Tel-Aviv, Isr
Duration: 24 Oct 199426 Oct 1994

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


Conference9th Meeting on Optical Engineering in Israel
CityTel-Aviv, Isr


Dive into the research topics of 'Two-dimensional optical position sensor'. Together they form a unique fingerprint.

Cite this