The line spread function and edge spread function for incoherent illumination are expressed in terms of the transfer function in the presence of rotationally nonsymmetric aberrations. A sampling theorem is derived which expresses the edge spread function in terms of sampled values of the line spread function. Typical numerical results are presented for third-order coma.
RICHARD BARAKAT and AGNES HOUSTON, "Line Spread and Edge Spread Functions in the Presence of Off-Axis Aberrations," J. Opt. Soc. Am. 55, 1132-1135 (1965)