Ultra-High-Speed Charge-Domain Temporally Compressive CMOS Image Sensors

Multi-tap charge modulators can implement temporal compressive sensing in the charge domain, which allows efficient sampling of spatiotemporal information. This processing requires no signal processing circuit on the image sensor. The operation speed is limited only by the speed of the charge modulator, not by the readout frame rate. This chapter explains the concept and benefits of and signal processing for compressive imaging in ultra-high-speed single-event filming and light detection and ranging (LiDAR). Based on our prototype ultra-high-speed CMOS image sensor that works at a burst frame rate of 303 Mfps, single-event filming of laser-induced plasma in laser processing and the decomposition of multiple reflections, which are one kind of multi-path interference in LiDAR, are demonstrated.