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本文提出了一种新的Fresnel波带片编码成像的重建方法.与传统的重建方法相比，这种新方法可以实现更高的空间分辨水平.具体而言，传统意义上来讲，Fresnel波带片编码成像的空间分辨水平取决于编码波带片的最外环宽度.本文提出的重建方法突破了这一限制，可以达到最外环宽度的1/m（m为正整数），从而超越了通常意义上的瑞利极限.
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关键词:
- 波带片编码成像 /
- 高分辨重建 /
- Fresnel波带片 /
- 高阶Gabor波带片
Zone plate coded imaging is an experimental technique for particle and strong X-ray imaging, which is widely applied to astronomy, nuclear medicine, and laser inertial confinement fusion researches. From conventional perspective, spatial resolution of zone plate depends on the encoding zone plate width of outermost ring r with a size greater than 1.22r. In X-ray region, however, the outermost ring width of Fresnel zone plate is limited by processing technology. Such a limitation makes it impossible to fabricate a sufficiently small zone plate, thus restricting the applications of Fresnel zone plate coded imaging. In this paper, we present a new reconstruction method of zone plate coded imaging by using a higher-order order Gabor zone plate. With the proposed method, higher spatial resolution can be achieved than with the regular methods, thus the spatial resolution is improved by 1/m times the width of outermost ring (where m is a positive integer). Consequently such a breakthrough goes beyond the limits of Rayleigh criterion in general.-
Keywords:
- zone plate coding /
- high-resolution imaging /
- Fresnel zone plate /
- higher-order Gabor zone plate
[1] Mertz L, Young N O 1961Proceedings of International Conference on Optical Instruments and Techniques(London:ChapmanHall) p305
[2] Chakrabarti S K, Palit S, Debnath D 2009Exp.Astron. 24 109
[3] Barret H H 1972J.Opt.Soc.Am. 13 382
[4] Ceglio N M, Attwood D T, George E V 1977J.Appl.Phys. 48 1566
[5] Ceglio N M, Coleman L W 1977Phys.Rev.Lett. 39 20
[6] Ceglio N M, Larsen J T 1980Phys.Rev.Lett. 44 579
[7] Wen S H, Ding Y K 2012Laser Inertial Confinement Fusion Diagnostics(Beijing:National Defend Industry Press) pp270(in Chinese)[温树槐, 丁永坤2012激光惯性约束聚变诊断学(北京:国防工业出版社)第270页]
[8] Ceglio N M, Geroge E V 1975Am.Phys.Soc. 20 1320
[9] Ceglio N M 1983Recent Advances in X-Ray Optics(Berlin:Springer Berlin Heidelberg) p97
[10] Ress D, Bell P M, Bradley D K 1993Rev.Sci.Instrum. 64 1404
[11] Ress D, DaSilva L B, R A 1995Rev.Sci.Instrum. 66 579
[12] Delage O 1995Rev.Sci.Instrum. 66 1205
[13] Pollaine S M 2001Phys.Plasmas 8 2357
[14] Brunol J, Sauneuf R, Gex J P 1979Opt.Commun. 31 129
[15] Fews A P, Lamb M J, Savage M 1992Opt.Commun. 94 259
[16] Nugent K A 1988Rev.Sci.Instrum. 59 1658
[17] Hu J S, Cheng L H, Cao L F, Dong J J, Ding Y K 1989Acta Opt.Sin. 9 263(in Chinese)[胡家升, 程丽红, 曹磊峰, 董建军, 丁永坤1989光学学报9 263]
[18] Cao L F 2002Ph.D. Dissertation(Mianyang:China Academy of Engineering Physics)(in Chinese)[曹磊峰2002博士学位论文(绵阳:中国工程物理研究院激光聚变研究中心)]
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[1] Mertz L, Young N O 1961Proceedings of International Conference on Optical Instruments and Techniques(London:ChapmanHall) p305
[2] Chakrabarti S K, Palit S, Debnath D 2009Exp.Astron. 24 109
[3] Barret H H 1972J.Opt.Soc.Am. 13 382
[4] Ceglio N M, Attwood D T, George E V 1977J.Appl.Phys. 48 1566
[5] Ceglio N M, Coleman L W 1977Phys.Rev.Lett. 39 20
[6] Ceglio N M, Larsen J T 1980Phys.Rev.Lett. 44 579
[7] Wen S H, Ding Y K 2012Laser Inertial Confinement Fusion Diagnostics(Beijing:National Defend Industry Press) pp270(in Chinese)[温树槐, 丁永坤2012激光惯性约束聚变诊断学(北京:国防工业出版社)第270页]
[8] Ceglio N M, Geroge E V 1975Am.Phys.Soc. 20 1320
[9] Ceglio N M 1983Recent Advances in X-Ray Optics(Berlin:Springer Berlin Heidelberg) p97
[10] Ress D, Bell P M, Bradley D K 1993Rev.Sci.Instrum. 64 1404
[11] Ress D, DaSilva L B, R A 1995Rev.Sci.Instrum. 66 579
[12] Delage O 1995Rev.Sci.Instrum. 66 1205
[13] Pollaine S M 2001Phys.Plasmas 8 2357
[14] Brunol J, Sauneuf R, Gex J P 1979Opt.Commun. 31 129
[15] Fews A P, Lamb M J, Savage M 1992Opt.Commun. 94 259
[16] Nugent K A 1988Rev.Sci.Instrum. 59 1658
[17] Hu J S, Cheng L H, Cao L F, Dong J J, Ding Y K 1989Acta Opt.Sin. 9 263(in Chinese)[胡家升, 程丽红, 曹磊峰, 董建军, 丁永坤1989光学学报9 263]
[18] Cao L F 2002Ph.D. Dissertation(Mianyang:China Academy of Engineering Physics)(in Chinese)[曹磊峰2002博士学位论文(绵阳:中国工程物理研究院激光聚变研究中心)]
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