Arosa Lobato, YagoLópez Lago, María ElenaFuente Carballo, Raúl de la2024-01-312024-01-312018-07Yago Arosa, Elena López-Lago, Raúl de la Fuente, Spectrally resolved white light interferometer for measuring dispersion in the visible and near infrared range, Measurement, Volume 122, 2018, Pages 6-13, https://doi.org/10.1016/j.measurement.2018.03.012.0263-2241http://hdl.handle.net/10347/32132We design a spectrally resolved interferometer to measure the refractive index of transparent samples over a broad spectral range of 400–1550 nm. The measuring device consists of a Michelson interferometer whose output is analysed by means of three fibre spectrometers: a homemade prism spectrometer which obtains the interferogram generated by the sample in the 400–1050 nm range, a homemade transmission grating spectrometer that measures the interferogram in the 950–1550 nm near infrared range, and a commercial Czerny-Turner spectrometer used to make high-precision measurements of the displacement between the Michelson mirrors. The whole system is illuminated by a white-light source with an emission spectrum similar to that of a black body. We test the instrument on solid and liquid samples achieving accuracy of up to 10−4 in the refractive index after fitting it with the Cauchy formula.engAtribución-NoComercial-CompartirIgual 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-sa/4.0/Wide spectrumRefractive indexChromatic dispersionInterferometryjournal article10.1016/j.measurement.2018.03.012open access