Classical diffraction theory is used to investigate the effects of high numerical aperture on the focusing of coherent light. By expanding the diffracted beam in plane waves, we show that the lens action can be expressed as a succession of three Fourier transforms. Furthermore, polarization effects are included in the model in a natural way. Some numerical results of the theory are also presented.
© 1986 Optical Society of America
Original Manuscript: December 20, 1985
Manuscript Accepted: July 23, 1986
Published: December 1, 1986
M. Mansuripur, "Distribution of light at and near the focus of high-numerical-aperture objectives," J. Opt. Soc. Am. A 3, 2086-2093 (1986)