Time-correlated underwater depth imaging using an asynchronous linear single photon avalanche diode detector array

Author(s):  
Aurora Maccarone ◽  
Ulrich Steinlehner ◽  
Giulia Acconcia ◽  
Ivan Giuseppe Labanca ◽  
Ivan Rech ◽  
...  
2013 ◽  
Vol 21 (19) ◽  
pp. 22098 ◽  
Author(s):  
Aongus McCarthy ◽  
Ximing Ren ◽  
Adriano Della Frera ◽  
Nathan R. Gemmell ◽  
Nils J. Krichel ◽  
...  

CLEO: 2014 ◽  
2014 ◽  
Author(s):  
Ximing Ren ◽  
Aongus McCarthy ◽  
Adriano Della Frera ◽  
Nathan R. Gemmell ◽  
Nils J. Krichel ◽  
...  

2016 ◽  
Vol 55 (4) ◽  
pp. 739 ◽  
Author(s):  
Jordana Blacksberg ◽  
Erik Alerstam ◽  
Yuki Maruyama ◽  
Corey J. Cochrane ◽  
George R. Rossman

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Susan Chan ◽  
Abderrahim Halimi ◽  
Feng Zhu ◽  
Istvan Gyongy ◽  
Robert K. Henderson ◽  
...  

2015 ◽  
Vol 23 (26) ◽  
pp. 33777 ◽  
Author(s):  
Giuseppe Intermite ◽  
Aongus McCarthy ◽  
Ryan E. Warburton ◽  
Ximing Ren ◽  
Federica Villa ◽  
...  

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4850
Author(s):  
Aurora Maccarone ◽  
Giulia Acconcia ◽  
Ulrich Steinlehner ◽  
Ivan Labanca ◽  
Darryl Newborough ◽  
...  

We present an optical depth imaging system suitable for highly scattering underwater environments. The system used the time-correlated single-photon counting (TCSPC) technique and the time-of-flight approach to obtain depth profiles. The single-photon detection was provided by a linear array of single-photon avalanche diode (SPAD) detectors fabricated in a customized silicon fabrication technology for optimized efficiency, dark count rate, and jitter performance. The bi-static transceiver comprised a pulsed laser diode source with central wavelength 670 nm, a linear array of 16 × 1 Si-SPAD detectors, with a dedicated TCSPC acquisition module. Cylindrical lenses were used to collect the light scattered by the target and image it onto the sensor. These laboratory-based experiments demonstrated single-photon depth imaging at a range of 1.65 m in highly scattering conditions, equivalent up to 8.3 attenuation lengths between the system and the target, using average optical powers of up to 15 mW. The depth and spatial resolution of this sensor were investigated in different scattering conditions.


2020 ◽  
Vol 59 (14) ◽  
pp. 4488 ◽  
Author(s):  
Peter W. R. Connolly ◽  
Ximing Ren ◽  
Aongus McCarthy ◽  
Hanning Mai ◽  
Federica Villa ◽  
...  

Author(s):  
R. Zhang ◽  
S. Draycott ◽  
I. Gyongy ◽  
D. M. Ingram ◽  
I. Underwood

Commonly deployed measurement systems for water waves are intrusive and measure a limited number of parameters. This results in difficulties in inferring detailed sea state information while additionally subjecting the system to environmental loading. Optical techniques offer a non-intrusive alternative, yet documented systems suffer a range of problems related to usability and performance. Here, we present experimental data obtained from a 256 × 256 Single Photon Avalanche Diode (SPAD) detector array used to measure water waves in a laboratory facility. 12 regular wave conditions are used to assess performance. Picosecond resolution time-of-flight measurements are obtained, without the use of dye, over an area of the water surface and processed to provide surface elevation data. The SPAD detector array is installed 0.487 m above the water surface and synchronized with a pulsed laser source with a wavelength of 532 nm and mean power <1 mW. Through analysis of the experimental results, and with the aid of an optical model, we demonstrate good performance up to a limiting steepness value, ka , of 0.11. Through this preliminary proof-of-concept study, we highlight the capability for SPAD-based systems to measure water waves within a given field-of-view simultaneously, while raising potential solutions for improving performance.


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