"Now, by leveraging Sony's technologies such as back-illuminated pixel structure, stacked configurations and Cu-Cu connections cultivated in the development of CMOS image sensors, and achieving the SPAD pixels and distance measuring processing circuitry on a single chip, Sony has succeeded in developing a compact yet high-resolution sensor.
This enables high-precision, high-speed measurement at 15-centimeter range resolutions up to a distance of 300 meters (When measuring an object with a height of 1 meter and reflectance of 10% using additive mode of 6 x 6 pixels (H x V) under cloudy daylight conditions.)"
Sony ISSCC 2021 presentation gives few more details about the new SPAD chip:
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