Abstract

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 modulus of the Fresnel transform of a planar reflective object that is obscured by a thin moving diffuser. In a physical interpretation of that operation presented in this paper, we think of the object as being made up of a superposition of lens-like components, each with focal power appropriate to image the diffuser back onto itself and each with an associated attenuation and phase shift. This interpretation leads to the conclusion, which is verified analytically, that the same information about the object can be obtained without making interferometric measurements, i.e., without exploiting enhanced backscatter.

© 1993 Optical Society of America

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