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Designing the Response of an Optical Quad-Cell as Position-Sensitive Detector

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2 Author(s)
Salles, L.P. ; Center for R&D on Electr. Eng. (CPDEE), Univ. Fed. de Minas Gerais, Belo Horizonte, Brazil ; de Lima Monteiro, D.W.

This paper focuses on 2-D position-sensitive detectors based on the quad-cell architecture, and presents design solutions to compensate the usual nonlinear response of a conventional quad-cell to radially symmetric light spots. It has been observed that by changing the quad-cell perimeter geometry and by adding a properly sized central region with a different sensitivity, the output response can be linearized. The simulation results presented herein will enable one to estimate the most appropriate quad-cell design for the requirements of a given application.

Published in:

Sensors Journal, IEEE  (Volume:10 ,  Issue: 2 )