Huaping Zang, Chenglong Zheng, Quanping Fan, Chuanke Wang, Lai Wei, Leifeng Cao, Xiangru Wang, Erjun Liang. Generation of X-ray vortex with ultra-long depth of focus using axial line-focused spiral zone plates[J]. Chinese Optics Letters, 2018, 16(8): 080501
- Chinese Optics Letters
- Vol. 16, Issue 8, 080501 (2018)
Fig. 1. Transmittance for SZPs with the topological charge p = 1 x y r 2 θ p = 1 x y r 2 θ
Fig. 2. Schematic diagram of diffraction by the ALFSZPs.
Fig. 3. (a) The calculated axial irradiance of conventional SZPs; (b) the calculated axial irradiance of ALFSZPs with focal depths from 450 to 550 mm, Δ f = 100 mm N = 699 Δ d = 0.0858 μm 2 Δ f = 50 mm N = 699 Δ d = 0.0429 μm 2 Δ f = 50 mm N = 349 Δ d = 0.0858 μm 2
Fig. 4. (a), (b), and (c) Calculated diffraction patterns of ALFSZPs at the positions of 450, 500, and 550 mm. (d), (e), and (f) Calculated diffraction patters of conventional SZPs with the same parameters at the positions of 450, 500, and 550 mm.
Fig. 5. ALFSZPs with different integer topological charges and axial irradiances from 450 to 550 mm. (a), (b) The topological charge p = 0 p = 1 p = 2
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