%0 Book Section
%T Considerations on the design of diffractive optical needles
publisher IEEE Computer Society
%D 2019
%U 978-1-5386-6013-3
%@ https://hdl.handle.net/20.500.14352/13995
%X According to intensity consideration along the propagation axis, we derived mathematical conditions for a family of modulating functions able to produce needles of arbitrary length, sub-wavelength width and almost constant irradiance. These functions are derived by introducing mathematical constrains on the on-axis power content. As a result, the modulating distribution is continuous with no jumps within or at the edge of the pupil. Numerical results suggests that the proposed approach is suitable for producing high quality needles.
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