Andre Couder

André Couder (Alençon, November 27th 1897 - Paris, January 16th 1979) was a engineer-optician and Astronome French.

Resulting from the Institute of chemistry of Paris, André Couder joined the optical laboratory of the Observatoire of Paris in 1925 of which he becomes the director and acquires a world reputation quickly there; one owes him from now on, and until his retirement in 1968, the majority of the optical parts of the French instruments, of the Astrolabe of 6 centimetres opening to the Télescope of 193 centimetres which equips the Observatoire with High-Provence. It contributed in an important way to almost each aspect of the optical system of the telescopes. It developed techniques of polishing of parabolic surfaces after thermal deformation. He invented the screen with notches, the anastigmat To bend with 2 mirrors, a development of the telescope of Schwarzschild. He also invented “the null test” and recommended metal mirrors of the practical experiments. The “Law To bend” is the fundamental law of the primary education supports of mirror. Elected official member of the section of astronomy of the Academy of Science on June 14th 1954 and section of sciences of the universe in 1976, he became the president in 1968 about it.

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