Angles of incidence for s- and p-polarized light have been computed and confirmed experimentally for which monochromatic interference in transparent thin films on absorbing substrates results in optimum interference fringe contrast (visibility = 1). Under these angles of incidence and with polarized light, film thickness determinations which are not possible at normal incidence or with unpolarized light can be carried out by use of thin-film interference.
© 1980 Optical Society of America
Rolf H. Muller and Michael L. Sand, "Optimum angle of incidence for monochromatic interference in transparent films on absorbing substrates," J. Opt. Soc. Am. 70, 93-97 (1980)