@article{oai:repo.qst.go.jp:00080264,
 author = {香村, 芳樹 and 澤田, 佳 and 水牧, 仁一朗 and Owada, Kenji and Watanuki, Tetsu and 石川, 哲也 and Owada, Kenji and Watanuki, Tetsu},
 issue = {16},
 journal = {Optics Express},
 month = {Aug},
 note = {The distribution of topological charges on X-ray vortices was measured by differential Fourier space filtering microscope, differential radial Hilbert transform microscope. It was experimentally verified for the first time using a Spiral Fresnel zone plate objective lens. This X-ray microscope is highly sensitive to X-ray topological defects, such as edges and vortices, at the exit-face wave field of objects. Its efficient use is also discussed.},
 pages = {24115--24122},
 title = {X-ray microscope for imaging topological charge and orbital angular momentum distribution formed by chirality},
 volume = {28},
 year = {2020}
}