Topic: sem-resolution-and-magnification

Electron lenses and aberrations: what affects the resolution in electron microscopes?

By Marijke Scotuzzi - Aug 30, 2018

Resolution is one of the most important parameters in a scanning electron microscope (SEM). The lower the resolution, the smaller the features that can be seen. The resolution, which is typically not defined (and therefore measured) in a unique way, depends on the size of the beam when focused on the sample.

Resolution is one of the most important parameters in a scanning electron microscope (SEM). The lower the resolution, the smaller the features that can be seen. The resolution, which is typically not defined (and therefore measured) in a unique way, depends on the size of the beam when focused on the sample.

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Inside a scanning electron microscope: the SEM electron column explained

By Marijke Scotuzzi - Dec 21, 2017

Scanning electron microscopes (SEMs) use an electron beam to image samples with a resolution down to the nanometer scale. The electrons are emitted from a filament and collimated into a beam in the electron source. The beam is then focused on the sample surface by a set of lenses in the electron column. How does an electron lens work? And which kind of lenses exist? How are lenses combined to form an electron column? In this blog, we will answer these questions and give a general insight into the working principle of an electron column.

Scanning electron microscopes (SEMs) use an electron beam to image samples with a resolution down to the nanometer scale. The electrons are emitted from a filament and collimated into a beam in the electron source. The beam is then focused on the sample surface by a set of lenses in the electron column. How does an electron lens work? And which kind of lenses exist? How are lenses combined to form an electron column? In this blog, we will answer these questions and give a general insight into the working principle of an electron column.

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Spot size in scanning electron microscopy (SEM): why it matters!

By Antonis Nanakoudis - Nov 9, 2017

Scanning electron microscopes have emerged as a very valuable characterization method in recent years, following the major technological developments and the continuous shrinking of material dimensions. SEMs are versatile tools that allow users to perform many different types of analyses on a wide range of materials and to achieve the best results, users should carefully select the main microscope settings. One of those settings is the spot size, i.e. the diameter of the probe at the sample. In this blog, I explain how to adjust the spot size in a SEM — and how to achieve the right balance between high-resolution imaging and a high beam current to get the results you’re looking for.

Scanning electron microscopes have emerged as a very valuable characterization method in recent years, following the major technological developments and the continuous shrinking of material dimensions. SEMs are versatile tools that allow users to perform many different types of analyses on a wide range of materials and to achieve the best results, users should carefully select the main microscope settings. One of those settings is the spot size, i.e. the diameter of the probe at the sample. In this blog, I explain how to adjust the spot size in a SEM — and how to achieve the right balance between high-resolution imaging and a high beam current to get the results you’re looking for.

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Microscopy resolution resolved! A simple explanation for an often misunderstood term

By Luigi Raspolini - Mar 24, 2017

There are different definitions of resolution and they depend on what kind of application you are working on. This blog's intent is to highlight and clarify the differences between the resolution of a LCD screen and the idea of resolution in microscopy.

There are different definitions of resolution and they depend on what kind of application you are working on. This blog's intent is to highlight and clarify the differences between the resolution of a LCD screen and the idea of resolution in microscopy.

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Magnification (in SEM): is it the key to analyse your samples?

By Luigi Raspolini - Mar 16, 2017

Magnification is a very simple concept, but it sometimes can create confusion because of its own definition. The aim of this blog is to clarify this topic and focus on other parameters which can describe better how big an object is represented.

Magnification is a very simple concept, but it sometimes can create confusion because of its own definition. The aim of this blog is to clarify this topic and focus on other parameters which can describe better how big an object is represented.

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