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Daniel Schwenter
Daniel Schwenter (Schwender) (31 January 1585 – 19 January 1636) was a German Orientalist, mathematician, inventor, poet, and librarian.
Schwenter was born in Nuremberg. He was professor of oriental languages and mathematics at the University of Altdorf. This is achieved by a preface written by Schwenter in the book ''Kurtzer, gründtlicher, warhaffter, gebesserter und vermehrter Underricht, Zuberaitung und Gebrauch deß Circkels, Schregmeß und Linial'' from George Galgemair and by an old chronicle of the University of Altdorf.〔Ralf Kern: Wissenschaftliche Instrumente in ihrer Zeit. Volume 2. Cologne, 2010. pp. 276-277.〕 His works include ''Delicia Physico-Mathematicae'' (Nuremberg, 1636) and ''Geometriae practicae novae et auctae tractatus I-IV'' (published posthumously in 1641). As a linguist, Schwenter was familiar with Greek, Hebrew, Arabic, Syriac, and Aramaic. He was also an authority on Euclid. He died in Altdorf bei Nürnberg.
== Schwenter and the Scioptric Ball ==
He is credited with developing the scioptric ball in 1636. This is a universal joint that allows a microscope, mounted on the ball, to be swiveled into any position. Its invention was inspired by Schwenter's studies of the human eye. The scioptric ball provided a firm anchor for a microscope or telescope while allowing the telescope to be swiveled in all directions in order to follow the course of an eclipse or for drawing panoramic views. It was in some ways the first wide-angle lens.
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