多重分形波带片

Multifractal zone plates.

作者信息

Giménez Fernando, Furlan Walter D, Calatayud Arnau, Monsoriu Juan A

机构信息

I.U. Matemática Pura y Aplicada, Universidad Politécnica de Valencia, E-46022 Valencia, Spain.

出版信息

J Opt Soc Am A Opt Image Sci Vis. 2010 Aug 1;27(8):1851-5. doi: 10.1364/JOSAA.27.001851.

DOI:10.1364/JOSAA.27.001851

PMID:20686590

Abstract

We present multifractal zone plates (MFZPs) as what is to our knowledge a new family of diffractive lenses whose structure is based on the combination of fractal zone plates (FZPs) of different orders. The typical result is a composite of two FZPs with the central one having a first-order focal length f surrounded by outer zones with a third-order focal length f. The focusing properties of different members of this family are examined and compared with conventional composite Fresnel zone plates. It is shown that MFZPs improve the axial resolution and also give better performance under polychromatic illumination.

摘要

我们提出了多重分形波带片（MFZP），据我们所知，它是一种新型的衍射透镜，其结构基于不同阶次的分形波带片（FZP）的组合。典型的结果是两个FZP的组合，中心的FZP具有一阶焦距f，周围的外环具有三阶焦距f。研究了该家族不同成员的聚焦特性，并与传统的复合菲涅耳波带片进行了比较。结果表明，MFZP提高了轴向分辨率，并且在多色照明下表现更好。