Ernst Ruska-Centre and Peter Grünberg Institute, Forschungszentrum Jülich, D-52425 Jülich, Germany.
Ultramicroscopy. 2013 Jun;129:18-29. doi: 10.1016/j.ultramic.2013.03.001. Epub 2013 Mar 14.
In order to investigate the reproducibility of measurements of transmission electron microscope detector modulation transfer functions (MTFs) we measure the MTF of a charge-coupled device (CCD) camera using five different methods. MTFs derived from a sharp edge, a circular aperture and electron holographic interference fringes are found to agree closely with one other. The difficulty of obtaining accurate measurements of MTFs and the potential of using focused electron probes to make direct measurements of MTFs is discussed. We highlight the sensitivity of image contrast after deconvolution to small differences in the measured MTF.
为了研究透射电子显微镜探测器调制传递函数（MTF）测量的可重复性，我们使用五种不同的方法测量了电荷耦合器件（CCD）相机的 MTF。发现从锐边、圆形孔径和电子全息干涉条纹得出的 MTF 彼此非常吻合。讨论了获得准确的 MTF 测量值的难度以及使用聚焦电子探针进行直接 MTF 测量的潜力。我们强调了在反卷积后图像对比度对测量的 MTF 微小差异的敏感性。
