We describe a new approach to suppress undesired diffraction orders in
the signal area of a Fourier plane diffractive optical element (DOE). We
implement this new approach for the DOE design by a two-stage iterative
Fourier transform algorithm that incorporates an adaptive optimization of the
signal-to-noise ratio and does not require the introduction of a dummy output
area outside the field of view. A comparison among this approach and three
other approaches are presented on the basis of numerical results from several
sample diffraction patterns.
© 1997 Optical Society of America
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