Single photon imaging Lidar using three Geiger-mode avalanche diodes

Zhenyang Zhang; Caiwen Ma; Xiuqin Su; Songmao Chen; Shuchao Wang; Wenhua Zhu

doi:10.1117/12.2547913

18 December 2019 Single photon imaging Lidar using three Geiger-mode avalanche diodes

Zhenyang Zhang, Caiwen Ma, Xiuqin Su, Songmao Chen, Shuchao Wang, Wenhua Zhu

Proceedings Volume 11338, AOPC 2019: Optical Sensing and Imaging Technology; 1133835 (2019) https://doi.org/10.1117/12.2547913
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

In this paper, based on the principle that signals only occurs on a few time-bins (timing accuracy of a modern TCSPC module) due to short period illumination and the noise which is almost a constant for all bins, we designed an algorithm for denoising by using signals from multiple detectors and further improving the performance by adopting signal processing technique (e.g. median filtering). To exploit the information from the histograms efficiently, it is necessary to choose the gating width in an appropriate range, so that a well-placed window is large enough to capture most of signals, but without accepting too many noise. Whether to accept the signal is determined by weighting signals from multi-detectors within each gate width, where only multiple detections are recorded during the period can be accepted, otherwise detection is considered as noise and removed in the final reconstruction. Thus the three-dimensional information (the twodimensional spatial information and the depth information) of the target can be obtained accurately. In the algorithm, the results are evaluated numerically by signal to reconstruction error (SRE). The advantage is learned by comparing with several classic methods, the data used in this paper are derived from a mathematical model which account for Poisson statistics and Lidar equation.

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Zhenyang Zhang, Caiwen Ma, Xiuqin Su, Songmao Chen, Shuchao Wang, and Wenhua Zhu "Single photon imaging Lidar using three Geiger-mode avalanche diodes", Proc. SPIE 11338, AOPC 2019: Optical Sensing and Imaging Technology, 1133835 (18 December 2019); https://doi.org/10.1117/12.2547913

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KEYWORDS

LIDAR

Single photon

Interference (communication)

Reflectivity

Signal detection

3D image processing

Photon counting

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