Determination of the refractive index and Abbe number of glass of spherical lenses.

The paper deals with the problem of determination of basic parameters of unknown spherical lenses, namely their radii of curvature, thicknesses, and refractive indices of materials, for example, optical glasses, from which these lenses are made. Four methods are proposed to obtain these parameters and mathematical relations are derived that allow us to determine the refractive index and Abbe number of lens material based on the measured radius values, the thickness, and the position of the focal point or the focal length.