Any instrument in which the interference of waves (e.g. of light) from a common source is employed to make precise measurements of (linear or…

a type of interferometer for measuring small distances in which a beam of light is split by a half-silvered mirror into two beams that travel by…

A device used to produce interfering beams of light, consisting essentially of two plane parallel reflecting plates of fixed separation and (in some…

Used attributively or jointly to designate the étalon invented by Fabry and Pérot (see étalon, n.), and also an interferometer designed on the…

A type of optical interferometer in which light is split into two beams whose paths can be widely separated before they are recombined at another…