Exact light propagation between rotated planes using non-uniform sampling and angular spectrum method

Abstract

A novel method is proposed for simulating exact light propagation between rotated planes using non-uniform sampling and angular spectrum method. Angular spectrum method (ASM) was widely used for simulating light diffraction between rotated planes using uniform sampling and interpolation of positive spatial frequency spectrums along z axis on a rotated destination plane which is an approximation valid only for large sampling interval on a source plane and for small rotation angle of a destination plane. To simulate exact wave propagation between rotated planes independent on sampling interval on a source plane or rotation angle of a destination plane, we applied non-uniform sampling to angular spectrum method. In the proposed method, we can produce simulation results between rotated planes with high accuracy for any sampling interval on a source plane or for any rotated angle.