In what year was the inventor of the Abbe prism born?
Ernst Abbe Ernst Karl Abbe HonFRMS (23 January 1840 – 14 January 1905) was a German physicist, optical scientist, entrepreneur, and social reformer. Together with Otto Schott and Carl Zeiss, he laid the foundation of modern optics. Abbe developed numerous optical instruments. He was a co-owner of Carl Zeiss AG, a German manufacturer of research microscopes, astronomical telescopes, planetariums and other optical systems.
Louise du Pierry Louise du Pierry or Dupiery, née "Elisabeth Louise Felicité Pourra de la Madeleine" (30 July 1746 – 27 February 1807), was a French astronomer and professor.