Cone-beam imaging with sub-100 nm focal-sized Kirkpatrick–Baez mirrors

We report about magnified hard X-ray imaging in cone-beam geometry with a secondary source size of 85×95 nm2. The small spot size is achieved by focusing with Kirkpatrick–Baez (KB) mirrors at a third-generation synchrotron source. This small and more divergent source projects a magnified sample shadow, overcoming the resolution limit of the detection system. The proposed scheme allows imaging with high resolution and efficiency at the same time. In addition, it should be suitable for coherent imaging experiments.