In general, in one aspect, the invention features a system including a light source, a plurality of interferometers configured to receive light from the light source and to form output light, each interferometer including a first optic and a second optic, the first and second optics configured to be...http://www.google.fr/patents/US7639367?utm_source=gb-gplus-shareBrevet US7639367 - Interferometer system for monitoring an object
