WORKSHOP PAPER
Light-Emission Crosstalk Model and Dynamic Correction Algorithm for Large-Scale SPAD Image Sensors
A. Abdelghafar1, K. Morimoto1, H. Sekine1, H. Tsuchiya1, M. Shinohara1, Y. Ota1, J. Iwata1, Y. Matsuno1, K. Sakurai1, T. Ichikawa1
1Canon Inc., Kanagawa, Japan

Abstract

We present a new dynamic correction algorithm to suppress the impact of light-emission (LE) crosstalk in single-photon avalanche diode (SPAD) image sensors. The proposed algorithm demonstrated a capability of correcting both LE crosstalk and nonlinearity in a SPAD sensor, minimizing the effect of hot clusters and color shift that could potentially appear over the array. The results demonstrated a significant improvement in dark signal non-uniformity and color reproducibility. The proposed algorithm allows large-scale SPAD sensors to be implemented in various fields of imaging applications such as surveillance, biomedical and automotive.
Publisher: IISS (Int. Image Sensors Society)
Year: 2023
Workshop: IISW
URL: https://doi.org/10.60928/efkw-jmws
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Keywords

Light-Emission Crosstalk, SPAD Image Sensors, Dynamic Correction Algorithm,

References

1) I. Rech et al., "Optical crosstalk in single photon avalanche diode arrays: A new complete model", Opt. Express, 2008. https://doi.org/10.1364/oe.16.008381
2) R. Younger et al., "Crosstalk analysis of integrated Geiger-mode avalanche photodiode focal plane arrays", Defense + Commercial Sensing, 2009. https://doi.org/10.1117/12.819173
3) S. Jahromi and J. Kostamovaara, "Timing and probability of crosstalk in a dense CMOS SPAD array in pulsed TOF applications", Opt. Express, 2018. https://doi.org/10.1364/oe.26.020622
4) K. Ito et al., "A Back Illuminated 10 m SPAD Pixel Array Comprising Full Trench Isolation and Cu-Cu Bonding with Over 14% PDE at 940nm", IEEE Int. Electron Devices Meeting (IEDM), 2020. https://doi.org/10.1109/iedm13553.2020.9371944
5) Y. Maruyama et al., "A 1024 × 8, 700-ps Time-Gated SPAD Line Sensor for Planetary Surface Exploration With Laser Raman Spectroscopy and LIBS", IEEE J. Solid-State Circuits, 2014. https://doi.org/10.1109/jssc.2013.2282091
6) Y. Ota et al., "A 0.37W 143dB-Dynamic-Range 1Mpixel Backside-Illuminated Charge-Focusing SPAD Image Sensor with Pixel-Wise Exposure Control and Adaptive Clocked Recharging", IEEE Int. Solid- State Circuits Conference (ISSCC), 2022. https://doi.org/10.1109/isscc42614.2022.9731644
7) K. Morimoto et al., "3.2 Megapixel 3D-Stacked Charge Focusing SPAD for Low-Light Imaging and Depth Sensing", IEEE Int. Electron Devices Meeting (IEDM), 2021. https://doi.org/10.1109/iedm19574.2021.9720605