This work is divided in three parts: In the first part a model for evaluating the multiple scattering contribution, as a function of particle properties, to optical measurement systems (as LIDAR or particle-counters) is developed. This model, based on `Successive Singular Scattering` method, uses the Monte-Carlo approach to calculate all multiple-scattering orders. Application of this model to LIDAR systems was found to agree with results obtained by previous accepted models. The advantage of our model is that it can handle multiple-scattering computations in off-axis geometries and is not limited therefore to monostatic systems (where the light propagation direction and the detector field-of-view are on the same axis). The second and third part of this work discuss different aspects of mathematical inversion of optical measurements containing multiple-scattering.
Bnayahu, Yair 
- Israel Atomic Energy Commission, Yavne (Israel). Soreq Nuclear Research Center