Using a three-scale expansion, we solved the equation governing the propagation of the coherence function in a random medium with a mean index of refraction profile. An expression for the intensity distribution near a caustic was obtained including both diffraction and scattering effects. The expression may be readily evaluated in the absence of scattering and in the case of weak or strong scattering. Numerical examples are presented.
ASJC Scopus subject areas
- Arts and Humanities (miscellaneous)
- Acoustics and Ultrasonics