Abstract

The shapes of the reflected and transmitted fringes of an interferential wedge are studied theoretically and experimentally. It is shown that, for high reflectivities of wedge coatings, interesting interference patterns are obtained, such as bright narrow fringes in reflection. The fringe profiles are computed for different wedge geometries, coating reflectivities, and incidence angles in the cases of equal and unequal coating reflectivities. The localization of the fringes is studied in relation to the focusing effect that is due to the wedge. The interferential wedge properties of frequency selectivity and tunability are discussed briefly with regard to applications to spectroscopy and laser technology.

© 1981 Optical Society of America

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