Showing papers by "Jannik C. Meyer published in 2002"
TL;DR: In this article, a parabolic refractive x-ray lens was used to image the interior of opaque samples with sub-micrometer resolution, at a resolution well below 1 μm.
Abstract: Based on parabolic refractive x-ray lenses we have built a hard x-ray microscope that allows one to image the interior of opaque samples with submicrometer resolution We have combined magnified imaging with tomography to obtain the three-dimensional structure of the sample at a resolution well below 1 μm Using an aluminum lens to record a magnified tomogram of a test sample (microprocessor), a resolution of slightly above 400 nm was found for the three-dimensional reconstruction Lenses made of beryllium are expected to improve this resolution to well below 100 nm The resulting challenges concerning instrumentation and numerical methods are discussed
61 citations
TL;DR: Parabolic refractive X-ray lenses are optical components especially suitable for third-generation synchrotron radiation sources as mentioned in this paper, and they can be used for micrometre and sub-micrometres focusing and for imaging in absorption and phase contrast.
Abstract: Parabolic refractive X-ray lenses are optical components, especially suitable for third-generation synchrotron radiation sources. This article describes the status of the development of our lenses and illustrates the possibilities for micrometre and submicrometre focusing and for X-ray imaging in absorption and phase contrast. The parabolic lens profile ensures distortion-free imaging of high quality. First characteristics of Be lenses are given. A microscope based on Be lenses is expected to have a lateral resolution below 80 nm.
59 citations
TL;DR: In this article, the parabolic refractive xray lenses of beryllium have been used for hard x-ray microscopy and microanalysis at synchrotron radiation sources.
Abstract: The development of parabolic refractive x-ray lenses has opened new possibilities for hard x-ray microscopy and microanalysis at synchrotron radiation sources. Using aluminium, we have fabricated parabolic refractive xray lenses of high quality that are used for distortion free, magnifying imaging with sub-micrometer resolution. Combined with tomographic techniques, this allows one to reconstruct the three-dimensional inner structure of a sample at sub-micrometer resolution with minimal sample preparation. The lenses can be used to image the synchrotron radiation source onto a sample in a reducing geometry, generating an intensive hard x-ray microbeam at the sample position. The microbeam allows one to perform hard x-ray analytical techniques with a spatial resolution in the micrometer and sub-micrometer range, such as fluorescence and absorption spectroscopy, diffraction, or small angle scattering. Recently, we have succeeded to make parabolic refractive xray lenses of beryllium. These lenses are more than one order of magnitude more transparent for hard x-rays than aluminium lenses. In addition, they have a larger aperture that can lead to a higher resolution (down to 50nm) and a larger field of view (about 1mm) in imaging experiments. The beryllium lenses have been characterized in first experiments. Their optical performance is compared to that of the aluminium lenses.