An apodized cubic phase mask used in a wavefront coding system to extend the depth of field

doi:10.1088/1674-1056/ac5979

Abstract The point spread function (PSF) caused by a wavefront coding system with a cubic phase mask has big side-lobes which leads to bad image restoration. This paper proposes a novel apodized cubic phase mask to suppress the side-lobes of the PSF. Simulated annealing algorithm is used to optimize the cubic and the truncation parameter of the phase mask. The system with the novel phase mask has better performance in the modulation transfer function (MTF) especially in low-and-medium spatial frequency region. The simulation results show that the restored images with the novel phase mask are superior to the one with the classic cubic phase mask in contrast and ringing effect. The experimental results show that the side-lobes of the PSF are suppressed by using the apodized cubic phase mask.

Keywords: apodized cubic phase mask wavefront coding depth of field image restoration

Received: 28 October 2021
Revised: 10 February 2022
Accepted manuscript online:

PACS:	42.30.-d	(Imaging and optical processing)
	42.30.Kq	(Fourier optics)
	42.30.Lr	(Modulation and optical transfer functions)
	42.30.Va	(Image forming and processing)

Corresponding Authors: Tingyu Zhao,E-mail:zhaotingyu@zstu.edu.cn
E-mail: zhaotingyu@zstu.edu.cn

About author: 2022-3-2

Cite this article:

Lina Zhu(朱丽娜), Fei Li(李飞), Zeyu Huang(黄泽宇), and Tingyu Zhao(赵廷玉) An apodized cubic phase mask used in a wavefront coding system to extend the depth of field 2022 Chin. Phys. B 31 054217

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[1]	Optical transfer function analysis of circular-pupil wavefront coding systems with separable phase masks Zhao Ting-Yu(赵廷玉), Liu Qin-Xiao(刘钦晓), and Yu Fei-Hong(余飞鸿) . Chin. Phys. B, 2012, 21(6): 064203.

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An apodized cubic phase mask used in a wavefront coding system to extend the depth of field

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