Figure 4
Comparison between the calculated (top panel) and the measured (bottom panel) transmission curves, normalized to clean mirror conditions. The calculated curves were obtained for carbon layers of thickness 20 nm (blue), 26 nm (magenta), 30 nm (black) and 50 nm (red). The measured transmission curves (bottom panel) were obtained after 17, 23, 25 and 50 days operation (indicated by blue, magenta, black and red data points, respectively). |