Linearity of responsivity

{
  "id": "MLC-T-CHM-006638",
  "term": "Linearity of responsivity",
  "field": "Chemistry",
  "definition": "The property of a radiation detector by which its electrical output rises in strict proportion to the radiant power reaching it, across a stated range of power, so that twice the power gives twice the signal. Departures from this behavior appear at very low power, where noise and dark current dominate, and at very high power, where the detector saturates. Responsivity itself is the output signal per unit of incident radiant power, for example amperes per watt for a photodiode.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "radiation detector",
    "irradiation",
    "radiant power",
    "wavelength"
  ],
  "references": [
    "PAC, 1995, 67, 1745. 'Nomenclature, symbols, units and their usage in spectrochemical analysis-XI. Detection of radiation (IUPAC Recommendations 1995)' on page 1750 (https://doi.org/10.1351/pac199567101745)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/linearity-of-responsivity/"
}