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Proceedings Paper

Control of the focal depth by annular phase-only pupil filters
Author(s): Xiaofeng Zhao; Changqing Liu; Chuanxun Hou; Yinpeng Wei; Zhili Zhang
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Paper Abstract

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.

Paper Details

Date Published: 24 October 2017
PDF: 7 pages
Proc. SPIE 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications, 1046228 (24 October 2017); doi: 10.1117/12.2284393
Show Author Affiliations
Xiaofeng Zhao, Xi'an Research Institute of High Technology (China)
Changqing Liu, Xi'an Research Institute of High Technology (China)
Chuanxun Hou, Xi'an Research Institute of High Technology (China)
Yinpeng Wei, Xi'an Research Institute of High Technology (China)
Zhili Zhang, Xi’an Research Institute of High Technology (China)


Published in SPIE Proceedings Vol. 10462:
AOPC 2017: Optical Sensing and Imaging Technology and Applications
Yadong Jiang; Haimei Gong; Weibiao Chen; Jin Li, Editor(s)

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