Target Oriented Illumination Analysis as a Comparative Approach of PSPI and Finite Difference Methods

The present work discusses an alternative approach for illumination studies using the commonly known Raytracing method. Previous papers have pointed out the effectiveness of the finite difference modeling, despite the fact of the high computational cost. Alves et al. (2009) proposed a technique of target orientating using Finite Difference (FD) which reduces significantly the computational efforts in comparison to the traditional approach based on modeling followed by migration. This work shows the first 2D results of a new approach to target oriented illumination using Phase Shift Plus Interpolation (PSPI) modeling. We make a comparison of illumination studies through FD and PSPI modeling utilizing several velocity models.