Ultra long high resolution beam by multi-zone rotationally symmetrical complex pupil filter

被引：47

作者：

Xu, Yingshun

Singh, Janak

Sheppard, Colin J. R.

Chen, Nanguang

机构：

[1] Natl Univ Singapore, Div Bioengn, Singapore 117574, Singapore

[2] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore

[3] ASTAR, Inst Microelect, Singapore 117685, Singapore

来源：

OPTICS EXPRESS | 2007年 / 15卷 / 10期

关键词：

D O I：

10.1364/OE.15.006409

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An ultra long high resolution beam with extension of depth of focus (DoF) in the axial direction as well as high resolution in the transverse direction has been demonstrated by a seven-zone rotationally symmetrical complex pupil filter imposed at the aperture of a focusing lens. Both amplitude and phase of the transmitted light are modulated in different zones. The scalar diffraction theory is used to optimize the zone parameters. Simulation results show that extended DoF of the beam is increased by 16 times while the spot size at the beam waist is reduced to 0.7 times. (C) 2007 Optical Society of America

引用

收藏

页码：6409 / 6413

页数：5

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