Hartmann, Johannes Franz (1865-1936)

Astronomy and Astrophysics – Astronomy

Scientific paper

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History And Archaeoastronomy, Biographies

Scientific paper

Born in Erfurt, Germany, became professor in Potsdam where he developed astrophysics. During this time an 80 cm refracting telescope was installed in the observatory for photographic use. Its performance was disappointing, and Hartmann developed the method of testing optics today named after him. The Hartmann test consists of partly obscuring the lens with a Hartmann shutter, and revealing diffe...

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