André Blondel (28.08.1863-15.11.1938) was a French physicist and a member of the Paris Academy of Sciences (1913). He was born in Dijon. He studied at the École Polytechnique and graduated from the École des Ponts et Chaussées (1888). In 1888-89 he worked in M. Cornu's laboratory at the École Polytechnique. From 1893 he was professor at the École des Mines and at the École des Ponts et Chaussées. At the end of the 1890s his legs became paralysed, but he continued his research, having founded a laboratory at Levallois.
His work was in the fields of optics, electromagnetism, acoustics and mechanics. He refined a number of photometric units and introduced the concepts of luminous flux and illuminance. He invented (1893) the electromagnetic oscillograph with a bifilar suspension, and is the founder of oscillographic methods. His work was also on the theory of electrical machines and on wireless communication.
A foreign member of the USSR Academy of Sciences (1932).