File:Ctftoimage2.png

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Ctftoimage2.png (763 × 317 pixels, file size: 180 KB, MIME type: image/png)

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English: Electron phase contrast transfer function (CTF) and wavefield image analysis: At left find maps of contrast-transfer versus spatial-frequency without (left-half) and with (right-half) spherical aberration, as a function of imaging-system defocus in the vertical direction.

At right find images (left-half) and image power-spectra (right-half) showing contrast transfer zeros at Gaussian and Scherzer[1] defocus.

In the thin-specimen limit, cyan bands in the panel at left show specimen-regions of increased projected-potential as darker, while red bands show contrast as reversed.
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Author P. Fraundorf

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I, the copyright holder of this work, hereby publish it under the following license:
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This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
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  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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  1. Otto Scherzer (1949) "The theoretical resolution limit of the electron microscope", J. Appl. Phys. 20, 20 (link).

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current12:46, 2 February 2016Thumbnail for version as of 12:46, 2 February 2016763 × 317 (180 KB)Unitsphere (talk | contribs)User created page with UploadWizard

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