Abstract
The paper presents new measurements of the optical constants and of the reflectance and transmittance of evaporated aluminum films produced from the purest grade of aluminum with extremely fast evaporation at about 10−5 mm Hg. The optical constants were determined by Drude’s polarimetric method from opaque films and by reflectance, transmittance, and true thickness measurements of semitransparent films. The following results were obtained.

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