Title : Omron and Politecnico di Milano Design SPAD-based Rangefinder
link : Omron and Politecnico di Milano Design SPAD-based Rangefinder
Omron and Politecnico di Milano Design SPAD-based Rangefinder
Politecnico di Milano, Italy, and Omron, Japan, publish a MDPI paper "Spot Tracking and TDC Sharing in SPAD Arrays for TOF LiDAR" by by Vincenzo Sesta, Fabio Severini, Federica Villa, Rudi Lussana, Franco Zappa, Ken Nakamuro, and Yuki Matsui.
"In this work, we study a novel architecture for Single Photon Avalanche Diode (SPAD) arrays suitable for handheld single point rangefinders, which is aimed at the identification of the objects’ position in the presence of strong ambient background illumination. The system will be developed for an industrial environment, and the array targets a distance range of about 1 m and a precision of few centimeters. Since the laser spot illuminates only a small portion of the array, while all pixels are exposed to background illumination, we propose and validate through Monte Carlo simulations a novel architecture for the identification of the pixels illuminated by the laser spot to perform an adaptive laser spot tracking and a smart sharing of the timing electronics, thus significantly improving the accuracy of the distance measurement. Such a novel architecture represents a robust and effective approach to develop SPAD arrays for industrial applications with extremely high background illumination."
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