Optical Sensors in Radiometry: Detector Types, D*, NEP and Applications

In short Two physical families. Quantum (photon) detectors count photo-generated carriers; thermal detectors measure the heat that absorbed light produces. Photodiodes are the workhorse. Linear, fast and efficient, with detectivity D* of about 10¹²–10¹⁴ Jones from the UV to the short-wave IR, mostly at room temperature. Low light and long waves. Photomultipliers and single-photon devices […]
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