Development of High Speed Single Photon Counting Image Sensor
The detectors on CMOS SPAD image sensors have been shown to provide detection performance on par with single high-speed single photon counting devices with significantly reduced size, cost, and power consumption. This allows them to be integrated to form a highly-miniaturized single chip image sensor. To date efforts have focused on smart pixels, where complex circuitry is integrated in the pixel with the detector. It is our belief that some of the innate advantages of these remarkable detectors are lost with this approach, and bringing these circuits out of the pixel in an arrayed format would greatly improve the pixel fill factor and the performance of the image sensor. Our research is focused on the development of a highly miniaturized CMOS SPAD image sensor, capable of running with lower power and equal performance through improved circuitry, proposal to be presented.
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