Eindhoven University of Technology has made a photodiode with such low noise (<10-6mA/cm2 dark current) and wide dynamic range (<150dB), that it can optically detect a heartbeat at a distance of 1.3m. TU Eindhoven researcher Riccardo Ollearo having the pulse in his finger measured remotely by thin-film photodiode Through an unexpected photo-multiplier effect, it can ...
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