Contrast transfer function: Difference between revisions

Revision as of 05:51, 13 June 2015

Revision as of 20:35, 13 June 2015

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As shown in the figure, the most restrictive envelope term will dominate in damping the contrast transfer function. In this particular example, the temporal envelope term is the most restrictive. BecuaseBecause the envelope terms damp more strongly at higher spatial frequencies, there comes a point where no more phase signal can pass through. This is called the '''Information Limit''' of the microscope, and is one measure of the resolution.

<br /> Modeling the envelope function can give insight into both TEM instrument design, and imaging parameters. By modeling the different aberrations via envelope terms, it is possible to see which aberrations are most limiting the phase signal.