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

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6 Author(s)
Sgrott, O. ; Fondazione Bruno Kessler (FBK), Trento, Italy ; Mosconi, D. ; Perenzoni, M. ; Pedretti, G.
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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 winner-take-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.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:45 ,  Issue: 7 )

Date of Publication:

July 2010

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