Abstract

A brief description is given of a method for approximate synthesis of multilayer filters consisting of either homogeneous layers or inhomogeneous films. The method is based on the fact that the amplitude reflectance is the approximate Fourier transform of the function 12U(p)/U(p), where U(p) is the effective refractive index as a function of the optical thickness p. Two forms of the sampling theorem are applied to obtain explicit expressions for the film parameters in terms of the specified reflectivity at certain sampling values of the frequency. Numerical examples are included.

© 1967 Optical Society of America

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