CX. An interferometric study of same optical properties of evaporated silver films

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Abstract
Thermally evaporated silver films have been studied in the reflectivity range of 4 to 95 per cent. The air-silver and glass-silver reflection and transmission coefficients, the corresponding reflection phase changes and the apparent film thickness have been measured and compared with those of sputtered silver films. For very thin films, in a region where the light absorption is high, the glass-silver reflection coefficient passes through a minimum, and in the yellow and the green, but not in the blue, the glass-silver reflection phase change suddenly alters from an advance to a retardation. This transition in the phase change is intimately associated with the reflected fringe asymmetry.