WAir-wedge shearing interferometer
WAtom interferometer
WFabry–Pérot interferometer
WFizeau interferometer
WGalaxy H-Alpha Fabry-Perot System
WGires–Tournois etalon
WJamin interferometer
WLarge Aperture Experiment to Detect the Dark Ages
WLinnik interferometer
WLISA Pathfinder
WMach–Zehnder interferometer
WMagdalena Ridge Observatory
WMichelson interferometer
WMichelson stellar interferometer
WMirau interferometer
WMultiple satellite imaging
WNeutron interferometer
WPoint diffraction interferometer
WShearing interferometer
WSydney University Stellar Interferometer
WTAMA 300
WTwyman–Green interferometer
WWhite light scanner
WWhite–Juday warp-field interferometer