This paper describes the design and characterization of a 134-pixel linear array sensor for three-dimensional measurements based on both multiple-pulse indirect-time-of-flight (ITOF) and optical triangulation (OT) techniques. In OT mode, a winnertake-all (WTA) stage allows for a fast localization of the spot position along the pixel array so that only useful pixels are selectively read out, for a maximum operation speed of 131 kVoxel/s. Distance measurements in OT mode over the range 0.4 m–1.0 m are obtained with a best precision of 0.004%–0.21%, while ITOF operation allows mapping the range 0.8–3 m at 125 voxel/s with a relative precision of 1.7%–3.8%. Background rejection up to 10 klux has also been demonstrated without the need of any optical filters.

A 134-pixel CMOS Sensor for Combined Time-of-Flight and Optical Triangulation 3D Imaging

Sgrott, Oreste;Mosconi, Daniel;Perenzoni, Matteo;Pedretti, Gianmaria;Gonzo, Lorenzo;Stoppa, David
2010

Abstract

This paper describes the design and characterization of a 134-pixel linear array sensor for three-dimensional measurements based on both multiple-pulse indirect-time-of-flight (ITOF) and optical triangulation (OT) techniques. In OT mode, a winnertake-all (WTA) stage allows for a fast localization of the spot position along the pixel array so that only useful pixels are selectively read out, for a maximum operation speed of 131 kVoxel/s. Distance measurements in OT mode over the range 0.4 m–1.0 m are obtained with a best precision of 0.004%–0.21%, while ITOF operation allows mapping the range 0.8–3 m at 125 voxel/s with a relative precision of 1.7%–3.8%. Background rejection up to 10 klux has also been demonstrated without the need of any optical filters.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11582/14609
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