Absolute calibration of a charge-coupled device camera with twin beams

  title={Absolute calibration of a charge-coupled device camera with twin beams},
  author={Ivano Ruo-Berchera and Alice Meda and Ivo Pietro Degiovanni and Giorgio Brida and Maria Luisa Rastello and Marco Genovese},
  journal={Applied Physics Letters},
We report on the absolute calibration of a Charge-Coupled Device (CCD) camera by exploiting quantum correlation. This method exploits a certain number of spatial pairwise quantum correlated modes produced by spontaneous parametric-down-conversion. We develop a measurement model accounting for all the uncertainty contributions, and we reach the relative uncertainty of 0.3% in low photon flux regime. This represents a significant step forward for the characterization of (scientific) CCDs used in… 

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