Indirect time-of-flight 3D ranging based on SPADs

S. Bellisai; F. Villa; S. Tisa; D. Bronzi; F. Zappa

doi:10.1117/12.908222

20 January 2012 Indirect time-of-flight 3D ranging based on SPADs

S. Bellisai, F. Villa, S. Tisa, D. Bronzi, F. Zappa

Proceedings Volume 8268, Quantum Sensing and Nanophotonic Devices IX; 82681C (2012) https://doi.org/10.1117/12.908222
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

Systems for 3D image acquisition are the enabling technology for a number of applications such as architectural studies, safety and security, automotive. Single-sensor active-illumination cameras are the most promising system, ensuring a good depth measurement accuracy combined with a simple structure (no double sensor required), simplest measurement algorithm and night and daytime operation. These systems are based on the measurement of the time delay between the emission of light signal and the detection of the back-reflected signal (Time of Flight - TOF). The direct measurement of the time delay between two adjacent pulses is called direct TOF (dTOF), while if the time delay is obtained starting from the phase delay of a periodic waveform we speak of indirect TOF (iTOF). We present two different 0.35μm CMOS Silicon mini-arrays for iTOF 3D ranging based on square and sinusoidal waveforms, in which the sensitive element is a Single-Photon Avalanche Diode (SPAD).

Citation Download Citation

S. Bellisai, F. Villa, S. Tisa, D. Bronzi, and F. Zappa "Indirect time-of-flight 3D ranging based on SPADs", Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82681C (20 January 2012); https://doi.org/10.1117/12.908222

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