A method for the measurement of the refractive index of dielectric cylinders
J Alonso; E Bernabeu; J Alonso; Departamento de Óptica, Universidad Complutense de Madrid, Ciudad Universitaria s/n, Facultad de Ciencias Físicas, 28040 Madrid, Spain; E Bernabeu; Departamento de Óptica, Universidad Complutense de Madrid, Ciudad Universitaria s/n, Facultad de Ciencias Físicas, 28040 Madrid, Spain
Журнал:
Pure and Applied Optics: Journal of the European Optical Society Part A
Дата:
1997-03-01
Аннотация:
A method for the precise measurement of the refractive index in dielectric rods of arbitrary diameter is proposed, tested and analysed. The method uses a grid of regularly spaced lines which is observed through the transparent cylinder under monochromatic illumination. The images of the grid lines are rotated with respect to the original orientation, and the maximum deflection angle is uniquely related with the refractive index. The sensitivity of the method is analytically studied and an experimental proof is given.
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