Anisoplanatic short-exposure imaging in turbulence

A conventional approach to short-exposure imaging through the turbulent atmosphere is generalized to imaging of nonisoplanatic objects. A new approximate formula for a short-exposure modulation transfer function is obtained, based on the path-integral representation of the field in a random medium. This formula is free of some of the drawbacks of previous approximations and describes the influence of diffraction effects and medium fluctuation distribution along the propagation path. Results of computation of short-exposure structure functions and short-exposure modulation transfer functions are presented.