Abstract

Optical thin film methods were used to determine the refractive index and absorption coefficient of paper at 70.5,96.5, and 118.8 μm. Transmittances and reflectances were measured of paper, two quartz and two TPX plates, as well as of the paper pressed between the quartz and TPX plates. Measurements were performed at angles of incidence between 0 and 50°. The optical constants found provided a reasonable fit between the experimental points and the calculated performance. The small residual departures between the two sets of data are probably due to inhomogeneities within the paper.

© 1986 Optical Society of America

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