A few years ago, Edoardo Charbon, an EPFL professor and head of the Advanced Quantum Architecture Laboratory, unveiled a new, ultra-high-power camera called Swiss SPAD2. His device was the first to be able to capture and count the very smallest form of light particle: the photon. It can also generate 3D images and calculate depth of field by measuring the amount of time it takes for a photon to travel from the camera to an object.
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Source: Phys.org