Line Plot from Scientific Research

Reflectance spectra of the ACFs for the visible and IR ranges. The reflectance is sensitive to the achromaticity of the ACFs. The red line (denoted by 1) is the reflectance of the normal Cu film. The reflectance of the ACFs (denoted by 29) decreases as the achromaticity increases. The smallest reflectance is 2.5% at 550 nm, with a value of 19.5% at 1800 nm, for the darkest ACF (denoted by 10) with RGB indices of (0, 0, 0).

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