Formulas are derived for calculating the absorption coefficient of a dispersed medium, using measured values of the reflectances and transmittances of layers of finite thickness. Two methods for determining the absorption coefficient in the case of weak absorption are proposed. For the first method to be realized, it is sufficient to have one sample of finite thickness, for the second one two samples are needed: one of finite and the other of infinite thickness. It is shown that the second method permits one to determine the absorption coefficient with an error only slightly greater than the minimal one over a wider range of thicknesses than the first method.
1. G.V. Rozenberg, Spectroscopy of Light- Scattering Media, (Izdat. Akad. Nauk BSSR,
2. G.V. Rozenberg, M.J. Sakhnovskii, and S.G. Guminetskii, Opt. Spektrosk. 23, No. 5,
3. E.P. Zege, O.P. Bushmakova, I.L. Katsev, and М.V. Konovalov, Zh. Prikl. Spektrosk. 30, No. 5, 900 (1979).
4. E.P. Zege and I.L. Katsev, Zh. Prikl. Spektrosk. 33, No. 3, 550 (1980).
5. E.P. Zege, M.P. Znachenok, and I.L. Katsev, Zh. Prikl. Spektrosk. 33, No. 4, 735 (1980).
6. K. Case and P. Zweifeld, Linear Theory of Transfer [in Russian, Mir, Moscow, (1972)].
7. O.V. Morozhenko and E.G. Yanovitskii, Tables for Calculating the Intensities of the Atmospheric Radiation (Naukova Dumka, Kiev, 1964).
8. M.A. Voishvillo, Opt. Spektrosk. 31, No. 2, 275 (1971).
9. M.A. Voishvillo, Opt. Spektrosk. 31, No. 3, 458 (1971).
10. G.V. Rozenberg, Usp. Fiz. Nauk, 91, No. 4, 569 (1967).