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. 2012 Apr;18(2):336-42.
doi: 10.1017/S1431927611012633. Epub 2012 Feb 14.

Fully automated measurement of the modulation transfer function of charge-coupled devices above the Nyquist frequency

Wouter Van den Broek  1 , Sandra Van Aert, Dirk Van Dyck
Affiliations

Fully automated measurement of the modulation transfer function of charge-coupled devices above the Nyquist frequency

Wouter Van den Broek et al. Microsc Microanal. 2012 Apr.

Abstract

The charge-coupled devices used in electron microscopy are coated with a scintillating crystal that gives rise to a severe modulation transfer function (MTF). Exact knowledge of the MTF is imperative for a good correspondence between image simulation and experiment. We present a practical method to measure the MTF above the Nyquist frequency from the beam blocker's shadow image. The image processing has been fully automated and the program is made public. The method is successfully tested on three cameras with various beam blocker shapes.

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