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Vibration Microscope
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
The vibration microscope (or optical comparator) was used to calibrate the frequency of a tuning fork in terms of a fork of known frequency. Hermann von Helmholtz invented the form; Jules Antoine Lissajous introduced that in which the reference fork is driven electromagnetically. This electromagnetic example is inscribed “Rudolph Koenig a Paris” and was used at the U.S. Military Academy at West Point.
National Museum of American History’s own descriptionSubjects
Credit lineVibration Microscope. Rudolph Koenig. National Museum of American History, United States Military Academy. CC0.
