This paper describes a novel architecture for an optical position sensor which has been implemented on a single chip using standard digital CMOS technology. The prototype device consists of 20×20 active pixels and two row and column parallel processing units with corresponding digital decoding logic. The image contour is extracted by means of distributed peak-detection, implemented at pixel level, followed by a digital extraction of the beam centroid position executed at row and column level. The sensor chip achieves up to 3000 frames/s with a position accuracy of 0.013 pixel and a total power consumption of 15 mW at 5 V.
A Fast CMOS Optical Position Sensor With High Subpixel Resolution
Massari, Nicola;Gonzo, Lorenzo;Gottardi, Massimo;Simoni, Andrea
2004-01-01
Abstract
This paper describes a novel architecture for an optical position sensor which has been implemented on a single chip using standard digital CMOS technology. The prototype device consists of 20×20 active pixels and two row and column parallel processing units with corresponding digital decoding logic. The image contour is extracted by means of distributed peak-detection, implemented at pixel level, followed by a digital extraction of the beam centroid position executed at row and column level. The sensor chip achieves up to 3000 frames/s with a position accuracy of 0.013 pixel and a total power consumption of 15 mW at 5 V.File in questo prodotto:
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