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Scanning Electron Microscope (SEM) ... The "Virtual Source" at the top represents the electron gun, producing a stream of monochromatic electrons. ... The final lens, the Objective, focuses the scanning beam onto the part of the specimen desired.
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www.unl.edu/CMRAcfem/semoptic.htm
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It was developed by Max Knoll and Ernst Ruska in Germany in 1931. The first Scanning Electron Microscope (SEM) debuted in 1942 with the first commercial instruments around 1965. Its late development was due to the electronics involved in "scanning" the beam of electrons across the sample.
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www.unl.edu/CMRAcfem/em.htm
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Science Learning Network Home / SLN Inquiry Resources / © 1996 Museum of Science, Boston ... How the SEM Works ... Microscope Links...
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www.mos.org/sln/sem/intro.html
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; How does the SEM work? ... ; What is the SEM? ... Info on the Scanning Electron Microscope -includes a picture of the SEM.
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www.mse.iastate.edu/microscopy/home.html
www.mse.iastate.edu/microscopy/home.html
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The Early History and Development of The Scanning Electron Microscope ... The early history of the Scanning Electron Microscope (SEM) is filled with many amusing stories. It is my great ambition to write the complete book one day ......in my spare time.
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www2.eng.cam.ac.uk/~bcb/history.htm
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The history of the scanning electron microscope ... In October, 1948 Professor Sir Charles Oatley, together with his research student Dennis McMullan, began the research and development that was to lead to the launch of the world's first series production scanning electron microscope in 1965. Through generations of...
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www2.eng.cam.ac.uk/~bcb/semhist.htm
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Electron microscope - Wikipedia, the free encyclopedia
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An electron microscope is a type of microscope, a scientific instrument which is used to magnify things on a fine scale. That uses a particle beam of electrons to illuminate a specimen and create a ...
en.wikipedia.org/wiki/Electron_microscope
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SEM stands for scanning electron microscope. The SEM is a microscope that uses electrons instead of light to form an image. Since their development in the early 1950's, scanning electron microscopes have developed new areas of study in the medical and physical science communities.
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www.purdue.edu/REM/rs/sem.htm
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