Ernst August Friedrich Ruska, German physicist and electrical engineer developed a transmission electron microscope employing electron beams and electromagnetic lenses in 1931-1933 Berlin, Germany. Rheinhold Rudenberg, filed the first patent for an electron microscope, yet the first commercial electron microscope was introduced in by Siemens-Reiniger-Werke AG in 1939. Russian-American inventor Vladimir Kosma Zworykin of the RCA Laboratory, Camden, NJ, USA, demonstrated by Ladislaus Morton on April 20, 1940, at the American Philosophical Society convention in Philadelphia, PA, USA. The microscope was 10 feet (3 meters) high, weighed about 1,000 pounds (454 kilograms), and magnified up to 100,000 diameters.
1931-33, 1939, April 20th 1940
Ernst August Friedrich Ruska
- History of Electron Microscope
The first prototype of microscope which uses a beam of electrons rather protons (light) was constructed by the German scientists Max Knoll and Ernst Ruska in 1931. However, the world’s first electron microscope is sometimes considered the model that was built by Ruska in 1933 with a capacity to resolve to 50nm.
- Introduction to Electron Microscopy – History | Thermo Fisher Scientific
The light microscope probably developed from the Galilean telescope during the 17th century. … Ernst Ruska at the University of Berlin, along with Max Knoll, combined these characteristics and built the first transmission electron microscope (TEM) in 1931, for which Ruska was awarded the Nobel Prize for Physics in 1986.
- Transmission electron microscopy – Wikipedia
Jump to History – Transmission electron microscopy is a microscopy technique in which a beam of electrons is transmitted through a specimen to form an …
- Electron microscope – Wikipedia
Jump to History – History … The first prototype electron microscope, capable of … Manfred von Ardenne pioneered the scanning electron microscope.
- History of electron microscopy, 1931-2000 – Caltech Authors
Dec 10, 2002 – Early History of Electron Microscopy: 1931 to 1960 … in Berlin produced the earliest scanning-transmission electron microscope in 1937. At the …