Research on high-efficiency arithmetic to improve ray trace method

A technique named local aperture grid optimization arithmetic was presented to improve the efficiency of the classical method. The chief aperture that contains all the rays in the incident field was divided into local aperture grids, on which selected sampling rays was calculated to determine its contribution level. Pre-defined calculation level was used to determine whether to calculate the rest rays on the local aperture or not. Therefore the rays that have no or little RCS contribution were neglected and the calculating time consumed on intersecting judgment was reduced. By programming examination, the optimization arithmetic was proved to be fairly precise and remarkably efficient, and also applied.