Paper
21 February 2014 Off-axis focusing and imaging of scaled zone plates and anamorphic photon sieves
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Abstract
Zone plates and photon sieves can be used to focus soft X-rays and hard X-rays. Relative to the parallel plane wave incidence and focusing on the optical axis, we here present two different models to describe the other kinds of focusing properties. The former, the scaled zone plates or photon sieves are appropriate for the titled plane wave to image, which can alter the propagation direction. The latter, the eccentric elliptical zone plates or photon sieves are appropriate for the point-to-point off-axis focusing. Based on the above-mentioned models, the different algorithms are discussed in detail under the condition of different numerical apertures. Furthermore, the correctness of our model has been verified through the commercial software VirtualLAB. The obtained results can be used for the analysis, design, and simulation of different zone plates and photon sieves, meanwhile the non-coaxial characteristics can increase the flexibility of the optical system.
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Junyong Zhang, Liangjun Zhang, Zhaoyang Jiao, and Yanli Zhang "Off-axis focusing and imaging of scaled zone plates and anamorphic photon sieves", Proc. SPIE 9142, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics: Optical Imaging, Remote Sensing, and Laser-Matter Interaction 2013, 91420S (21 February 2014); https://doi.org/10.1117/12.2054372
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KEYWORDS
Zone plates

Wave plates

Diffraction

Wave propagation

Hard x-rays

Imaging systems

X-rays

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