Scientific Results

Measuring the refractive index of vitreous materials at cryogenic temperatures with a spectrometer

Year: 2008

Authors: Vannoni M., Mochi I., Olivieri M., Mondello G., Molesini G.

Autors Affiliation: CNR, Istituto Nazionale di Ottica Applicata, Largo E Fermi 6, Firenze 50125, Italy; Istituto Nazionale di Astrofisica, Osservatorio Astrofisico di Arcetri, Largo E Fermi 5, Firenze 50125,Italy; Galileo Avionica, Via A Einstein 35, Campi Bisenzio 50013, Italy

Abstract: The use of a spectrometer to measure the refractive index of a prism glass sample in the visible and near-infrared regions at cryogenic temperature is reported. The details of the measuring cell and the experimental apparatus are provided, and a specific data reduction procedure based on ray tracing is introduced. Demonstrative results on a BK7 prism sample in a temperature range from 105 to 293 K and wavelength from 480 to 894 nm are presented. The measurement uncertainty is 3 x 10(-5) (2 sigma).


Volume: 19 (8)      Pages from: 085304  to: 085304

KeyWords: Cryogenics; Infrared devices; Prisms; Ray tracing; Spectrometers; Thermoelectricity; Uncertainty analysis; Cryogenic measurement; Cryogenic temperatures; Experimental apparatus; Measurement uncertainty; Measuring cells; Temperature range; Visible and near infrared; Vitreous materials; Refractive index
DOI: 10.1088/0957-0233/19/8/085304

Citations: 5
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