Refractometry of liquid samples with spectrally resolved white light interferometry
- 1 April 1990
- journal article
- Published by IOP Publishing in Measurement Science and Technology
- Vol. 1 (4) , 356-361
- https://doi.org/10.1088/0957-0233/1/4/008
Abstract
An interferometric method is presented to measure the differential refractive index Delta n of a liquid solution. The procedure is based on the spectroscopic analysis of the phase of a light beam which travels through the sample. The interferogram is recorded by a linear array of CCD photodiodes. The analogue signal so obtained is automatically processed by a microcomputer in order to get the refractive index. Precision of 2*10-7 in Delta n is obtained. Experimental examples and alternative methods of data processing are presented.Keywords
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