Fig. 5
From: Wear-resistant surface coloring by ultrathin optical coatings
Calculated (a) and measured (b) reflectance (red curve) as well as transmittance (black curve) spectra of a MDM film stack at normal incidence. Inset: Scheme of MDM film that is made of TiN-AlN-TiN from top to bottom. The thickness of film from the topmost to the bottom layer is TiN = 20 nm, AlN = 70 nm, and TiN = 20 nm, respectively. Calculated (e) and measured (f) reflectance (red curve) and transmittance (black curve) spectra of a FROC film at normal incidence. Inset: scheme of FROC film consisting of TiAlN-TiN-AlN-TiN. The thickness of each layer from top to bottom is TiAlN = 20 nm, TiN = 20 nm, AlN = 70 nm, and TiN = 20 nm, respectively. Measured transmittance spectra of a MDM film (c) and a FROC film (g) versus incidence angle. Photographs of a MDM and a FROC coating on glass. The coatings are semi-transparent. The reflection of a glove and transmission of another glove can be observed simultaneously. The MDM reflects and transmits different colors (d). The FROC, however, reflects and transmits nearly the same color (h)