Control of the Focal Depth by Annular Phase-Only Pupil Filters

被引：0
作者：
Zhao Xiaofeng [1 ]
Liu Changqing [1 ]
Hou Chuanxun [1 ]
Wei Yinpeng [1 ]
Zhang Zhili [1 ]
机构：
[1] Xian Res Inst Hitech, Sect 202, Xian 710025, Shaanxi, Peoples R China
来源：
AOPC 2017: OPTICAL SENSING AND IMAGING TECHNOLOGY AND APPLICATIONS | 2017年 / 10462卷
基金：
中国国家自然科学基金;
关键词：
annular phase-only pupil filter; super-resolution; Gaussian beam; depth of focus; OPTICAL-DATA STORAGE; FOCUSING PROPERTIES; SUPERRESOLUTION;
D O I：
10.1117/12.2284393
中图分类号：
TP7 [遥感技术];
学科分类号：
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要：
The general scalar diffractive theory for Gaussian beam has been investigated. The two-zone and three-zone annular phase-only pupil filters are adopted to provide specific numerical descriptions of improvement of DOF, respectively. The simulated results show that the annular phase-only pupil filters can be used to control the DOF of the optical system. For the well designed filters they can help improve the DOF in the axial direction and increase the resolution in the transverse direction, simultaneously. However, the Strehl ratio of the optical system maybe decline and the side-lobe to peak intensity ratio will increase with the improvement of the DOF which is hard for the optical imaging. Comparison results show that the two kinds of three-zone annular phase-only pupils have the same impact on the control of the light intensity distribution.
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页数：7
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