Spectrally resolved white light interferometer for measuring dispersion in the visible and near infrared range
| Autor: | Arosa, Y., Lago, E. Lopez, de la Fuente, R. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Measurement 122 (2018) 6-13 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.measurement.2018.03.012 |
| Popis: | We design a spectrally resolved interferometer to measure the refractive index of transparent samples over a broad spectral range between 400 and 550 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 between 400 and 1050 nm, a homemade transmission grating spectrometer that measures the interferogram in between 950 and 1550 nm, 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 0.0001 in the refractive index after fitting it with the Cauchy formula. Comment: 18 pages, 11 figures, 3 tables |
| Databáze: | arXiv |
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