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Title : 3D Imaging at 150m with QVGA SPAD Camera
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3D Imaging at 150m with QVGA SPAD Camera

Nature paper "Long-range depth imaging using a single-photon detector array and non-local data fusion" by Susan Chan, Abderrahim Halimi, Feng Zhu, Istvan Gyongy, Robert K. Henderson, Richard Bowman, Stephen McLaughlin, Gerald S. Buller, and Jonathan Leach from Heriot-Watt University, University of Edinburgh, and University of Bath uses 670nm wavelength to improve the SPAD sensor QE:

"In LIDAR (light detection and ranging) applications, single-photon sensitive detection is an emerging approach, offering high sensitivity to light and picosecond temporal resolution, and consequently excellent surface-to-surface resolution. The use of large format CMOS (complementary metal-oxide semiconductor) single-photon detector arrays provides high spatial resolution and allows the timing information to be acquired simultaneously across many pixels. In this work, we combine state-of-the-art single-photon detector array technology with non-local data fusion to generate high resolution three-dimensional depth information of long-range targets. The system is based on a visible pulsed illumination system at a wavelength of 670 nm and a 240 × 320 array sensor, achieving sub-centimeter precision in all three spatial dimensions at a distance of 150 meters. The non-local data fusion combines information from an optical image with sparse sampling of the single-photon array data, providing accurate depth information at low signature regions of the target."

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