The latest advances of Quanta Image Sensors (QIS) with CMOS photon-counting pixels are discussed in this paper, featuring two commercially available QIS devices with 16MPixel and 4MPixel resolution and 1.1µm and 2.2µm pixel sizes, respectively. These two breakthrough sensors both achieve reliable photon number resolving with deep sub-electron read noise under room temperature with full-speed operation. The low-noise readout is combined with a sizable full well capacity to realize high dynamic range (HDR). The new QIS devices provide unprecedented capability and value under low-light and HDR imaging conditions for security, defense, scientific, and consumer imaging applications.
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