Bartolini Erasmus

Bartolini Erasmus (13.VIII 1625 - 4.XI 1698) - Danish physicist and mathematician. Born in Roskilde. He studied at the University of Leiden, improved knowledge in France, Italy and England (in 1654 and received a master's degree). Since 1675 - Professor, University of Copenhagen (he was Dean of the Faculty of Medicine and the rector).
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. In the paper "Experiments with crystals of Iceland spar lime, which reveal a surprising and strange refraction" (1669) described the discovery of the phenomenon of double refraction in crystals of Iceland spar
. I noticed that, falling on the surface of Iceland spar, a ray of light, refracted, forks, and in the crystal there exists a direction along which such a phenomenon does not occur. Opening Bartolini marked the beginning of crystal optics. A follower of Descartes ..