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该论文提出了一种2×32像素的飞行时间（TOF）距离传感器阵列，通过像素级的环境光抑制技术，实现了在高达120klx环境光下的稳定测距。解决了传统TOF传感器在强环境光下性能下降的问题。
Real-time 3D imaging has reached a state of development where several fields of application are possible, such as factory automation, consumer electronics, security, and robotics. The first commercial products have already been launched, or will be available soon. Accuracies in the centimeter range or even below, low cost, and robustness to disturbances in realistic indoor and outdoor environments are the key performance demands for these sensors, which are mostly based on the time-of-flight (TOF) principle either in pulsed or continuouswave (CW) mode. Results with single-photon avalanche diodes (SPADs) and an array size of 128×128 pixels [1] permit a standard deviation of 1.4mm between two range maps after a measurement time of 1s with 0.25W solid-state laser pulses. Ambient light and/or temperature increase the dark-count rate of SPADs significantly, which dramatically reduces accuracy. The CW phase-correlation method
Gerald Zach, Horst Zimmermann
Vienna University of Technology, Vienna, Austria