Abstract
The k function arises in obtaining the general solution of the eikonal equation for a homogeneous, isotropic medium and describes the shape and the structure of individual wave fronts in a wave-front train as well as the associated caustic surface. The effect that refraction by a spherical refracting surface has on this k function is examined. This general result is applied to the refraction of a train of spherical wave fronts arising from a finite object point and is illustrated by several special cases.
© 1995 Optical Society of America
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