Journal
OPTICS LETTERS
Volume 25, Issue 1, Pages 1-3Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.25.000001
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A diffractive Alvarez lens is demonstrated that consists of two separate phase plates, each having complementary 16-level surface-relief profiles that contain cubic phase delays. Translation of these two components in the plane of the phase plates is shown to produce a variable astigmatic focus. Both spherical and cylindrical phase profiles are demonstrated with good accuracy, and the discrete surface-relief features ale shown to cause less than lambda/10 wave-front aberration in the transmitted wave front over a 40 mm x 80 mm region. (C) 2000 Optical Society of America.
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