Super-resolution imaging method and implementation device on the basis of Fresnel zone plate coding

Abstract

The invention discloses a super-resolution imaging method and an implementation device on the basis of Fresnel zone plate coding aiming at solving the problem of failure in obtaining super-resolution images of targets to be measured by the Fresnel zone plate coding method in the prior art. The method comprises following steps: (1) performing coding and imaging to a target to be measured by use of Fresnel zone plates as coding holes to obtain a coded pattern of the target to be measured; (2) performing recovery to the coded pattern by use of a penetration rate function of the mth order Gabor zone plate of the Fresnel zone plate to obtain a super-resolution original image of the target to be measured; m>0. The method and device have reasonable concept, ingenious design, and wide application range. The penetration rate function of the mth order Gabor zone plate of the Fresnel zone plate is used for recovering the coded pattern and therefore the limit of Rayleigh criterion is broken and better super-resolution imaging of targets to be measured is achieved.

Description

technical field [0001] The invention relates to the field of high-energy radiation imaging, in particular to a Fresnel zone-plate coding-based super-resolution imaging method and an implementation device thereof. Background technique [0002] The zone plate coding imaging technology is an imaging technology that obtains the three-dimensional information of the target through one exposure. It was proposed by Mertz and Young in 1961. At present, this technology is widely used in astronomy, nuclear medicine, laser inertial confinement fusion research and other fields, and its application and development in the field of inertial confinement fusion research (ICF) has attracted people's attention. [0003] In the ICF, important physical information such as the symmetry and uniformity of the driving radiation source and the growth of the hydrodynamic instability of the implosion compressed plasma can be obtained through the image of the implosion compression region. In particle an...

AI Technical Summary

Problems solved by technology

[0005] As we all know, spatial resolution is one of the important indicators to measure the performance of imaging devices, but the spatial resolution of Fresnel zone plate imaging is limited by the width Δr of the outermost ring of the zone plate, that is, only objects with a size greater than 1.22Δr can be resolved

Therefore, under the limitation of the Rayleigh criterion, the traditional Fresnel zone plate encoding imaging method is difficult to achieve super-resolution imaging of the target to be measured

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