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Heliostat
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
A heliostat throws sunlight where it might be used for photography or scientific observations. This example is based on the form devised by Leon Foucault in 1862. It has a rectangular mirror measuring 8.5 x 2.75 inches, a latitude arc, a declination arc, a clock drive, and a circular base with three leveling screws.
National Museum of American History’s own descriptionSubjects
Credit lineHeliostat. National Museum of American History, U.S. Military Academy. CC0.
