A new linear transfer theory and characterization method for image detectors. Part II: Experiment

作者：Lubk Axel^*; Roeder Falk; Niermann Tore; Gatel Christophe; Joulie Sebastien; Houdellier Florent; Magen Cesar; Hytch Martin J

来源：Ultramicroscopy, 2012, 115: 78-87.

DOI：10.1016/j.ultramic.2012.01.011

• Detection quantum efficiency
• Point spread function
• Modulation transfer function
• Image detector

A novel generalized linear transfer theory describing the signal and noise transfer in image detectors has been developed in Part I (Niermann, this issue, [1]) of this paper. Similar to the existing notion of a point spread PSF) describing the transfer of the first statistical moment (the average), a noise spread NSF) was introduced to characterize the spatially resolved transfer of noise (central second moment, covariance). Following the theoretic results developed in Part I (Niermann, this issue, [1]), a new experimental method based on single spot illumination has been developed and applied to measure 2D point and 4D noise spread functions of CCD cameras used in TEM. A dedicated oversampling method has been used to suppress aliasing in the measured quantities. We analyze the 4D noise spread with respect to electronic and photonic noise contributions.

• 出版日期2012-4