Abstract
Expressions to describe fringe contours in the region of interference of two coherent beams are derived for three combinations of plane and spherical wave geometries. Equations for the fringe contours for these basic configurations are given in detail. The fringe contrast ratio is shown to be spatially variable whenever spherical wave fronts are involved and can be controlled by altering the reference- to signal-beam irradiance ratio. These results are important for the fabrication of matched filters, holographic components, and optical interferometric testing.
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