In what year was the inventor of the Abbe prism born?
Abbe prism In optics, an Abbe prism, named for its inventor, the German physicist Ernst Abbe, is a type of "constant deviation dispersive prism" similar to a Pellin–Broca prism.
Étienne-Louis Malus Étienne-Louis Malus (] ; 23 July 1775 – 24 February 1812) was a French officer, engineer, physicist, and mathematician.