Jules Duboscq

Louis Jules Duboscq (March 5, 1817 – September 24, 1886) was a French instrument maker, inventor, and pioneering photographer. He was known in his time, and is remembered today, for the high quality of his optical instruments.
Life and work.
Duboscq was born at Seine-et-Oise in 1817. He was apprenticed in 1834 to Jean-Baptiste-François Soleil (1798–1878), a prominent instrument maker, and he married one of Soleil's daughters, Rosalie Jeanne Josephine, in 1839.
Among the instruments Duboscq built were a stereoscope (marketing David Brewster's lenticular stereoscope), a colorimeter, a polarimeter, a heliostat and a saccharimeter.