کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5466693 1518297 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Imaging with straight-edge phase plates in the TEM
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Imaging with straight-edge phase plates in the TEM
چکیده انگلیسی
The image of a simple phase object produced by a round lens with a Foucault or Hilbert phase plate can be determined with Abbe imaging theory and a 2D transform expressed in cylindrical coordinates. The contributions to the image amplitude from a uniform disc object and an azimuthally varying plate can then be distinguished and their phases relative to the incident wave can be compared. It appears that the usual choice of added phase for a Hilbert plate causes the image of a weak disc object to vanish as the plate edge approaches the axis, but a different choice of plate thickness can enable a weak phase object to provide a linear contribution to image intensity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 182, November 2017, Pages 124-130
نویسندگان
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