Intensity distribution behavior of self-image systems into turbulent media

We start by studying light propagation through a Lau-libe arrangement-two R onchi grids out of phase by half a period-within a turbulent medium. We sho w that degradation produced by the turbulence can be estimated in terms of the spacing between grids, the number of lines per millimeter, and C-epsilo n(2), the structure constant of the medium. We also propose a way to evalua te the structure constant in an experimental arrangement in the laboratory. (C) 1999 Optical Society of America [S0740-3232(99)00104-0].