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On Dark Field Techniques in Transmission Electron Microscopy by K. Shirota; T. Yamamoto; T. Yanaka; O. Vingsbo is a Physics and Astronomy article available to read on EtoBox.

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Different dark field techniques in transmission electron microscopy are investigated. In particular, a displaced aperture technique is developed, which produces high quality off-axis dark field images. The essential feature of the method is that the chromatic aberration of the objective and intermediate lenses is compensated for with the aid of a one-stage beam deflector in the object plane of the intermediate lens. In addition, the image distortion and the effect of the curvature of the image field are minimized by reducing the coefficient of sperical aberration of the intermediate lens. Diffracted beams, forming angles alpha up to 2.5 degrees with the optical axis, can be used for dark field imaging. Resolutions better than 30 A for alpha = 2 degrees, and 17 A for alpha = 1 degree, are obtained.

Who reads On Dark Field Techniques in Transmission Electron Microscopy?

Author

K. Shirota; T. Yamamoto; T. Yanaka; O. Vingsbo

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-3991)

Published

1975

Language

EN

Field

Physics and Astronomy (Physical Sciences)