Abstract

The optical constants of molybdenum are determined by Drude’s method for opaque films sputtered in air and in hydrogen, and for mirrors of massive metal, at wave-lengths 0.578μ, 0.546μ and 0.436μ. The indices of refraction and absorption, and the computed reflectivity are found to vary with the conditions of sputtering, and to be considerably less than for the massive metal. To eliminate any possible effect due to surface films formed by chemical action of the atmosphere, the final stage of polishing one of the bulk metal mirrors is carried out under kerosene, and the mirror is observed while immersed in kerosene. The results are not appreciably different when the same mirror is observed in air.

© 1934 Optical Society of America

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