Experimental demonstration of wave-front coded imaging with a very low response of the modulation transfer function at the Nyquist frequency

doi:10.1364/AO.58.009562

CORC > 西安光学精密机械研究所 > 中国科学院西安光学精密机械研究所 > 空间光学应用研究室

	Experimental demonstration of wave-front coded imaging with a very low response of the modulation transfer function at the Nyquist frequency
	Zhao, Hui2 ; Mi, Jiao 1,2; Yu, Congcong1,2 ; Ge, Rui 1,2; Fan, Xuewu2
刊名	Applied Optics
	2019-12-10
卷号	58 期号:35 页码:9562-9569
ISSN号	1559128X;21553165
DOI	10.1364/AO.58.009562
产权排序	1
英文摘要	Wave-front coding (WFC) is a well-known technique that can be used to extend the depth of field (DOF) of incoherent imaging systems. The phase masks make the optical transfer function drop significantly, and digital restoration must be used to obtain a clear image with a largely extended DOF. According to the existing literature, in order to obtain satisfactory restoration results, the optical modulation transfer function (MTF) at the Nyquist frequency is required to be bigger than 0.1, which has already become a popularly accepted design constraint. However, according to our experimental research reported in this paper, this requirement is overly strict. By assembling one already fabricated WFC lens and another camera having physically higher resolution, the MTF of the newly assembled WFC system used in the experimentation has quite a low response at its Nyquist frequency. The experimental results demonstrate that when the optical MTF value at the Nyquist frequency reaches the minimum value of about 0.05, visually satisfactory restoration results can still be obtained as long as the MTF is optimized to be highly insensitive to defocus and the corresponding SNR of the coded intermediate images goes beyond 20 dB at the same time. The experimental results indicate that the overly strict constraint could be alleviated while designing a WFC system. © 2019 Optical Society of America.
语种	英语
出版者	OSA - The Optical Society
内容类型	期刊论文
源URL	[http://ir.opt.ac.cn/handle/181661/32075]
专题	西安光学精密机械研究所_空间光学应用研究室
通讯作者	Zhao, Hui
作者单位	1.University of Chinese Academy of Sciences, Beijing; 100049, China 2.Space Optics Lab, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710019, China;
推荐引用方式 GB/T 7714	Zhao, Hui,Mi, Jiao,Yu, Congcong,et al. Experimental demonstration of wave-front coded imaging with a very low response of the modulation transfer function at the Nyquist frequency[J]. Applied Optics,2019,58(35):9562-9569.
APA	Zhao, Hui,Mi, Jiao,Yu, Congcong,Ge, Rui,&Fan, Xuewu.(2019).Experimental demonstration of wave-front coded imaging with a very low response of the modulation transfer function at the Nyquist frequency.Applied Optics,58(35),9562-9569.
MLA	Zhao, Hui,et al."Experimental demonstration of wave-front coded imaging with a very low response of the modulation transfer function at the Nyquist frequency".Applied Optics 58.35(2019):9562-9569.