Patent Document ID: 20160273906
Application ID: 15036471
Patent Flag: 0

Claim One:
1. A method of calculating electromagnetic scattering properties of a structure comprising: measuring radiation scattered from the structure to obtain measurement data; providing a prior estimate of the electromagnetic scattering properties of the structure; deriving a regularization coefficient from the measurement data; obtaining estimates of the scattering properties by using trial values of the scattering properties and the regularization coefficient in a mathematical model of scattering of radiation by the structure; determining whether a termination condition is met by reference to a merit function, parameters of the merit function including the regularization coefficient and the prior estimate and the estimates of the scattering properties; and if the termination condition is not met, iteratively repeating obtaining prediction data and deriving a regularization coefficient until the termination condition is satisfied; whereby the new trial values provided by the final iteration represent the calculated electromagnetic scattering properties.