[Wien] How to calculate the reflectivity when calculating optical properties

[phedra phedra]

Dear Wien users,
I want to calculate the reflectivity. According to UG, the absorption 
coefficients are given in the file case.absorp. But it seems like that the 
reflectivity are not given. Although the calculated result gives the file 
case.reflectivity, the value for the columns reflect_xx, reflect_yy and 
reflect_zz in the case.reflectivity are all zero.
So I want to calculate the reflectivity with imaginary and real part of the 
dielectric tensors myself. The imaginary parts can be found in the file 
case.joint. But where can I get the real parts? 
Why the labels, i.e Im_eps_xx, Im_eps_yy and Im_eps_zz, in files case.joint 
and case.epsilon are the same, but the corresponding values below the 
labels are not equal to each other for the two different files? There occur 
the same things for the columns Re_sigma_xx, Re_sigma_yy and Re_sigma_zz in 
different files case.sigmark and case.absorp.
Sorry for my little knowledge about optical theory.
Look forward to reply. Thanks in advance.
Best regards
Phedra

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