Abstract
Effects of spherical aberrations in converging and diverging
lens–axicon doublets are investigated. Intensity profiles are obtained
in the line and ring focal regions by numerically solving the
Fresnel–Kirchhoff integral. Comparisons with aberration-free
computations show that higher peak irradiances occur for the converging
doublet when spherical aberrations are included. Results are presented for
axicons with small apex angles in lens–axicon combinations illuminated
by collimated Gaussian 1.064-µm laser beams.
© 1997 Optical Society of America
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