15 February 2012 Fully integrated system-on-chip for pixel-based 3D depth and scene mapping
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Abstract
We present for the first time a fully integrated system-on-chip (SoC) for pixel-based 3D range detection suited for commercial applications. It is based on the time-of-flight (ToF) principle, i.e. measuring the phase difference of a reflected pulse train. The product epc600 is fabricated using a dedicated process flow, called Espros Photonic CMOS. This integration makes it possible to achieve a Quantum Efficiency (QE) of >80% in the full wavelength band from 520nm up to 900nm as well as very high timing precision in the sub-ns range which is needed for exact detection of the phase delay. The SoC features 8x8 pixels and includes all necessary sub-components such as ToF pixel array, voltage generation and regulation, non-volatile memory for configuration, LED driver for active illumination, digital SPI interface for easy communication, column based 12bit ADC converters, PLL and digital data processing with temporary data storage. The system can be operated at up to 100 frames per second.
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Martin Popp, Martin Popp, Beat De Coi, Beat De Coi, Markus Thalmann, Markus Thalmann, Radoslav Gancarz, Radoslav Gancarz, Pascal Ferrat, Pascal Ferrat, Martin Dürmüller, Martin Dürmüller, Florian Britt, Florian Britt, Marco Annese, Marco Annese, Markus Ledergerber, Markus Ledergerber, Gion-Pol Catregn, Gion-Pol Catregn, } "Fully integrated system-on-chip for pixel-based 3D depth and scene mapping", Proc. SPIE 8298, Sensors, Cameras, and Systems for Industrial and Scientific Applications XIII, 82980Z (15 February 2012); doi: 10.1117/12.917050; https://doi.org/10.1117/12.917050
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