Abstract

We have measured the spectral reflectance of a cupric sulfate single crystal for unpolarized radiation at near-normal incidence. Values of the refractive index n(ν) and the absorption index k(ν) have been obtained by subtractive Kramers-Kronig phase-shift analysis. The values of ∫ k(ν) for the characteristic SO4−− bands in the spectrum of the crystal are compared with values of ∫ k(ν) for these bands obtained by extrapolation of values of k(ν) determined for cupric sulfate solutions.

© 1977 Optical Society of America

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