Miniaturized compound refractive X-ray zoom lens

Kornemann, Elisa; Márkus, Ottó; Opolka, Alexander; Zhou, Tao; Greving, Imke; Storm, Malte; Krywka, Christina; Mohr, J.

doi:10.1364/oe.25.022455

Cited by 16 publications

(15 citation statements)

References 20 publications

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“…The simulated and measured focal distances f all showed the expected behavior regarding the astigmatism and required static focal point, with variations in the range of less than 0.1% [see Table 3, col. [3][4][5][6][7]. This validates the concept and functionality of the designed zoom lens.…”

Section: Optical Characterization Of X-ray Zoom Lenssupporting

confidence: 74%

“…The achieved angular tolerance was 90°±0.06° by laser triangulation. Details of the construction, mounting and precision of the lens elements as well as the electronic control of the X-ray zoom lens are explained elsewhere [5]. Fig.…”

Section: Fabrication Of Customized X-ray Zoom Lensmentioning

confidence: 99%

“…To achieve this, the microscopy setup has to be changed from a chromatic CRL to an objective with variable focal length, which can easily be included into the existing experimental setup. The recently introduced X-ray zoom lens [5,6] can keep a fixed working distance and constant magnification factor over a required energy range. This X-ray zoom lens consists of SU-8 lens elements fabricated by deep X-ray lithography [7][8][9] and positioned on bendable zoom lens fingers.…”

Section: Introductionmentioning

confidence: 99%

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X-ray zoom lens allows for energy scans in X-ray microscopy

et al. 2019

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We introduce a new design and development of a compound refractive X-ray zoom lens for energy scans in X-ray microscopy. Energy scans are, in principle, equivalent to radial scans in the reciprocal space for X-ray diffraction. Thanks to the absence of sample or detector motions, energy scans are better suited for microscopy, which requires high stability. In addition, close to the absorption edge of an element, energy scans can yield chemical information when coupled with resonant effects in either full field diffraction X-ray microscopy (FFDXM) or X-ray absorption near edge structure (XANES) microscopy. Here, we demonstrate the concept by using a customized compound refractive X-ray zoom lens for 11 keV near the Ge Kαedge. The working distance and magnification were kept constant during the energy scans by adapting the lens composition on switchable zoom lens fingers. This alleviates the need to reposition the lens while changing the energy and makes quantitative analysis more convenient for FFDXM. The fabricated zoom lens was characterized and proven suitable for the proposed measurement.

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Section: Optical Characterization Of X-ray Zoom Lenssupporting

confidence: 74%

Section: Fabrication Of Customized X-ray Zoom Lensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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X-ray zoom lens allows for energy scans in X-ray microscopy

et al. 2019

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“…There are plenty of examples of how to adjust the beam profile for a certain purpose in visible light optics [12], nevertheless so far mainly focusing concepts have been transferred to the hard X ray regime. For focusing X-rays at energies above approximately 10 keV refractive X ray optics are used, as for these energies the absorption of the lens materials decreases [13][14][15][16][17]. Using a refractive line focus lens to get an enlarged beam after the focal plane is not a suitable way to enlarge the vertical beam size, as in this case the absorption beam woul At the (KIT/IMT) sion limitat lowing we ies using sy…”

Section: Introductionmentioning

confidence: 99%

Optimizing illumination for full field imaging at high brilliance hard X-ray synchrotron sources

et al. 2018

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A new technique is presented to overcome beam size limitation in full field imaging at high brilliance synchrotron sources using specially designed refractive X-ray optics. These optics defocus the incoming beam in vertical direction and reshape the intensity distribution from a Gaussian to a more desirable top-hat-shaped profile at the same time. With these optics X-ray full-field imaging of extended objects becomes possible without having to stack several scans or applying a cone beam geometry in order to image the entire specimen. For in situ experiments in general and for diffraction limited sources in particular this gain in field of view and the optimization of the intensity distribution is going to be very beneficial.

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“…X-ray lenses, forming cavities in a suitable material, whose refractive index in the X-ray range is normally below 1, are used since years. Starting from cylindrical lenses for line foci 10 or crossed cylinders 11 and spherical lenses 12 for a spot focus, these have been developed further to a paraboloid shape with increasing focusing efficiency [11][12][13][14] . To obtain focal distances in the centimeter range, several single lenses are stacked to obtain coma) Electronic mail: anton.plech@kit.edu pound refractive lenses (CRL) 12 .…”

mentioning

confidence: 99%

Scalable, large area compound array refractive lens for hard X-rays

Reich

Rolo

Letzel

et al. 2018

Applied Physics Letters

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We demonstrate the fabrication of a 2D Compound Array Refractive Lens (CARL) for multi-contrast X-ray imaging. The CARL consists of six stacked polyimide foils with each displaying a 2D array of lenses with a 65 µm pitch aiming for a sensitivity on sub-micrometer structures with a (few-)micrometer resolution in sensing through phase and scattering contrast at multiple keV. The parabolic lenses are formed by indents in the foils by a paraboloid needle. The ability for fast single-exposure multi-contrast imaging is demonstrated by filming the kinetics of pulsed laser ablation in liquid. The three contrast channels: absorption, differential phase and scattering are imaged with a time resolution of 25 µs. By changing the sample-detector distance it is possible to distinguish between nanoparticles and microbubbles, respectively.

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Miniaturized compound refractive X-ray zoom lens

Cited by 16 publications

References 20 publications

X-ray zoom lens allows for energy scans in X-ray microscopy

X-ray zoom lens allows for energy scans in X-ray microscopy

Optimizing illumination for full field imaging at high brilliance hard X-ray synchrotron sources

Scalable, large area compound array refractive lens for hard X-rays

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