G. Welch et Wt. Rhodes, IMAGING THROUGH A RANDOM-PHASE SCREEN BY ENHANCED BACKSCATTER - A PHYSICAL INTERPRETATION, Applied optics, 32(15), 1993, pp. 2692-2696
It has been shown recently that enhanced backscatter processes can be
exploited in imaging diffuser-obscured objects. Through the use of an
interferometric measurement system it is possible to determine the mod
ulus of the Fresnel transform of a planar reflective object that is ob
scured by a thin moving diffuser. In a physical interpretation of that
operation presented in this paper, we think of the object as being ma
de up of a superposition of lens-like components, each with focal powe
r appropriate to image the diffuser back onto itself and each with an
associated attenuation and phase shift. This interpretation leads to t
he conclusion, which is verified analytically, that the same informati
on about the object can be obtained without making interferometric mea
surements, i.e., without exploiting enhanced backscatter.