We present a family of phase-only zone plates with substructure rings. For extending the depth of field, the foci are merged axially. And the substructure rings follows sequences used in spread spectrum techniques.
© 2006 Optical Society of America
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(070.6110) Fourier optics and signal processing : Spatial filtering
J. Ojeda-Castañeda, A. Sauceda-Carvajal, and J. e. a. Landgrave, "Extended Depth of Field: Axially Merging Foci," in Frontiers in Optics, OSA Technical Digest (CD) (Optical Society of America, 2006), paper JWD59.
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