Abstract

We show the principles of Herpin index and Epstein equivalent period approximations in graphic form and discuss the possibilities and limitations of the approximations with changes in wavelength and angle of incidence.

© 1989 Optical Society of America

Three-layer approximation of dielectric thin film systems

Torben Skettrup
Appl. Opt. 28(14) 2860-2863 (1989)

Graphical aids in the use of equivalent index in multilayer-filter design

Curtis Ufford and Philip Baumeister
J. Opt. Soc. Am. 64(3) 329-334 (1974)

Equivalent layers in oblique incidence: the problem of unsplit admittances and depolarization of partial reflectors

Zdeněk Knittl and Helena Houserková
Appl. Opt. 21(11) 2055-2068 (1982)

Refractive index as a variable in the numerical design of optical thin film systems

J. A. Dobrowolski and S. H. C. Piotrowski
Appl. Opt. 21(8) 1502-1511 (1982)

Gaussian and equivalent-step-index approximations for nonlinear waveguides

R. A. Sammut and C. Pask
J. Opt. Soc. Am. B 8(2) 395-402 (1991)