Loads measured spectra into a layer of type 'Glass coating'.

You have to specify the following parameters:

stack_index: Index of the layer stack (integer)

layer_index: Index of the layer in the stack (integer)

T : filename (including path) of the transmittance spectrum

R-air: filename (including path) of the reflectance spectrum (air side)

R-glass: filename (including path) of the reflectance spectrum (glass side)

file_format: File format as integer number (see file format specification)

option_t : file option for transmittance data

option_r_air : file option for reflectance data (air side)

option_r_glass : file option for reflectance data (glass side)

If you read the spectra from individual files which contain one spectrum only, all file options are 1.

If you read all spectra from a single file which contains all required data, you have to use the same filename for T, R-Top and R-Bottom and specify different values for option_t, option_r_top and option_r_bottom, depending of the sequence of the data in the file.