Abstract
Space-invariant, multilevel, diffractive phase elements are designed for
large-scale pattern-formation tasks. The importance of the design algorithm
and the phase-encoding geometry of the diffractive element is discussed with
regard to the performance of both on- and off-axis reconstruction, notably for
pixelated gratings. A new phase-encoding scheme is presented that results in
an increase of the diffraction efficiency for the off-axis
case.
© 1997 Optical Society of America
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