TY - JOUR T1 - Nondestructive determination of thickness and refractive index of transparent films JF - IBM Journal of Research Devices Y1 - 1964 A1 - W. A. Pliskin A1 - E. E. Conrad AB -

A simple nondestructive method of measuring the refractive index and thickness of transparent films on reflective substrates has been developed. The technique involves the use of a microscope equipped with a monochromatic filter on the objective and a stage that can be rotated so that the reflected light is observed at various angles. The film thickness, d, is given by d = {[ΔNλ]/[2µ(cos} r2, - cos r1)], where λ is the wavelength of the filtered light, µ is the refractive index, and {ΔN} is the number of fringes observed between the angles of refraction r2, and r1.

VL - 8 UR - http://portal.acm.org/citation.cfm?id=1662391 N1 -
KW - Pliskin1964 ER -