etalon
AN OPTICAL INTERFEROMETER MADE FROM TWO PARALLEL MIRRORS
Etalon; Fabry-Perot; Fabry-Perot Interferometer; Fabry-Perot Étalon; Fabry-Perot interferometer; Fabry-Perot etalon; Fabry-Perot étalon; Coefficient of Finesse; Coefficient of finesse; Fabry-Pérot etalon; Fabry perot etalon; Fabry Perot etalon; Fabry-Perot Etalon; Étalon; Fabry-Pérot étalon; Fabry-Pérot; Fabry Pérot etalon; Fabry Pérot étalon; Fabry Perot; Fabry Pérot; Fabry-Pérot interferometer; Fabry–Perot interferometer; Fabry–Pérot interferometers; Fabry-Perot device; Fabry–Perot etalon; Fabry–Pérot etalon; Fabry–Pérot; Fabry–Pérot laser; Fabry-Perot laser; Fabry-Pérot laser; Fabry-Pérot interferometers; Faby-Perot filter; Fabry-Perot filter; Fabry–Pérot interferometry; Finesse Coefficient; Fabry-Pérot interferometry; Fabry Pérot interferometer
['?t?l?n]
¦ noun Physics a device consisting of two reflecting plates, for producing interfering light beams.
Origin
early 20th cent.: from Fr. etalon, lit. 'standard of measurement'.