Mr. Lorenzo Gonzo Profile

Lorenzo Gonzo

Senior Research Scientist at Smart Optical Sensors and Interfaces

SPIE Involvement:

Author

Publications (7)

Proceedings Article | 14 May 2010 Paper

A 120x160 pixel CMOS range image sensor based on current assisted photonic demodulators

Lucio Pancheri, David Stoppa, Nicola Massari, Mattia Malfatti, Lorenzo Gonzo, Quazi Hossain, Gian-Franco Dalla Betta

Proceedings Volume 7726, 772615 (2010) https://doi.org/10.1117/12.854438

KEYWORDS: Modulation, Cameras, Sensors, Electrodes, Image sensors, Imaging systems, Distance measurement, Phase shift keying, Phase measurement, Correlation function

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Proceedings Article | 14 May 2010 Paper

Analysis and design of a CMOS-based terahertz sensor and readout

Daniele Perenzoni, Matteo Perenzoni, Lorenzo Gonzo, Antonio Capobianco, Francesco Sacchetto

Proceedings Volume 7726, 772618 (2010) https://doi.org/10.1117/12.854442

KEYWORDS: Sensors, Field effect transistors, Plasma, Antennas, Terahertz radiation, Transistors, Millimeter wave sensors, CMOS technology, Molybdenum, MATLAB

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Proceedings Article | 6 May 2010 Paper

Highly parallel SPAD detector for time-resolved lab-on-chip

Michele Benetti, Daniele Iori, Lucio Pancheri, Fausto Borghetti, Laura Pasquardini, Lorenzo Lunelli, Cecilia Pederzolli, Lorenzo Gonzo, Gian-Franco Dalla Betta, David Stoppa

Proceedings Volume 7723, 77231Q (2010) https://doi.org/10.1117/12.854565

KEYWORDS: Sensors, Luminescence, Chemical elements, Microfluidics, CMOS sensors, CMOS technology, Optical simulations, CCD image sensors, Monte Carlo methods, Electronics

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Fluorescence lifetime detection is widely used in molecular biology to monitor many cell parameters (such as pH, ion concentrations, etc.) and for an early diagnosis of many pathologies. In a typical fluorescence lifetime experiment a pulsed laser is used to excite the fluorescent dyes and the emitted light is revealed by means of high sensitivity detectors, typically: intensified CCD, PMTs or Single-Photon Avalanche Diodes (SPADs).In this contribute we present a SPAD detector module fabricated in a 0.35μm High Voltage CMOS technology to be used within a lab-on-chip system consisting of a micro-reactor array for bioaffinity assays based on fluorescence markers. The detector module, having a total area of 600 x 900 μm2, can be arranged to build a small pixel array to be directly coupled to the micro-reactors. No emission filters are needed, since the ultra-short laser pulse is cut off in the time domain. The module consists of a 10x10-SPAD array, where each SPAD cell is equipped with dedicated active quenching and recharging circuit. Each cell has a pitch of 26μm with a fill factor of 48%. The SPADs have been binned in order to realize a large photosensitive area detector exhibiting a reasonably low dark count rate (DCR) and reduced dead time, as required in a fast measurement system. A memory has also been implemented in order to enable only low DCR SPADs, so that a total DCR of about 100kHz can be achieved for the whole photosensitive area. The digital output generated by the SPAD array is sent to a time-discriminator stage which allows a time-gated detection of the incident light. Two time-windows have been implemented in this architecture. Their time width is controlled by an on-chip digital PLL locked to the external laser clock whereas the width of the time-windows can be set within the range 500ps-10ns with a resolution of 500ps. Photons detected within each time window are then counted by two 10-bits digital counters. Time-interleaved operation has been implemented to read out the pixel data in parallel with the photon detection phase.

Proceedings Article | 29 January 2007 Paper

Digital documentation of complex architectures by integration of multiple techniques: the case study of Valer Castle

Francesca Voltolini, Sabry El-Hakim, Fabio Remondino, Stefano Girardi, Alessandro Rizzi, Marco Pontin, Lorenzo Gonzo

Proceedings Volume 6491, 64910U (2007) https://doi.org/10.1117/12.702727

KEYWORDS: 3D modeling, Data modeling, Laser scanners, 3D image processing, Data acquisition, Cameras, Systems modeling, 3D acquisition, Visualization, Global Positioning System

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Proceedings Article | 22 June 2004 Paper

A fully integrated CMOS sensor for optical tracking

N. Massari, N. Viarani, Lorenzo Gonzo, Massimo Gottardi, Andrea Simoni

Proceedings Volume 5503, (2004) https://doi.org/10.1117/12.579865

KEYWORDS: Sensors, Optical tracking, CMOS sensors, Feature extraction, Digital electronics, Binary data, Transistors, CMOS technology, Image processing, Standards development

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Proceedings Article | 19 November 2003 Paper

A novel 3D staring system for driver assistance

Lorenzo Gonzo, Andrea Simoni, Massimo Gottardi, David Stoppa, Luigi Viarani, Piermario Repetto, Luca Liotti, Bartolomeo Pairetti, Elena Borello, Elena Balocco

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.530082

KEYWORDS: Electronics, Receivers, Safety, Transmitters, 3D image processing, Roads, Sensors, Optical design, Signal detection, Prototyping

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