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.

Duboscq was born at Villaines-sous-Bois (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.

[1] Among the instruments Duboscq built were a stereoscope (marketing David Brewster's lenticular stereoscope), a colorimeter,[2] a polarimeter, a heliostat and a saccharimeter.