Challenges in Phase Plate Product Development
نویسندگان
چکیده
The use of a phase plate in electron microscopy has shown renewed interest, triggered by a publication on this topic in 2001 by Danev and Nagayama [1]. This interest can be understood from the fact that many samples that are studied in TEM are weak phase objects. The use of a phase plate is the obvious method of choice to convert otherwise invisible phase modulations into visible amplitude modulations in the detected intensity profile. A phase plate can provide in-focus phase contrast, unlike the conventional method where a strong defocus is needed to generate contrast at low spatial resolutions, with the added consequence of introducing contrast reversals as a function of frequency.
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