Phase contrast soft x-ray microscopy using Zernike zone plates
نویسندگان
چکیده
منابع مشابه
Soft-X-ray microscopy using spiral zone plates.
Phase sensitive soft-x-ray microscopy methods enable the study of specimens for which phase effects are a prevalent contrast mechanism. One way to detect these phase effects is to optically implement the radial Hilbert transform by using spiral zone plates (SZPs), which results in the isotropic measurement of the amplitude and phase gradient in a sample. Soft-x-ray microscopy using an SZP as a ...
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X-ray imaging in differential interference contrast (DIC) with submicrometer optical resolution was performed by using a twin zone plate (TZP) setup generating focal spots closely spaced within the TZP spatial resolution of 160 nm. Optical path differences introduced by the sample are recorded by a CCD camera in a standard full-field imaging and by an aperture photodiode in a standard scanning ...
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Zernike phase contrast has been added to a full-field X-ray microscope with Fresnel zone plates that was in operation at 6.95 keV. The spatial resolution has also been improved by increasing the magnification of the microscope objective looking at the CsI(Tl) scintillation crystal. Cu no. 2000 meshes and a zone plate have been imaged to see the contrast as well as the spatial resolution. A Halo...
متن کاملFractal Zone Plates for X-ray Microscopy
Fresnel zone plates are diffractive elements that are essential to form images in X-ray microscopy[1,2]. One of the main shortcomings of Fresnel zone plates their high chromatic aberration. Recently presented, Fractal Zone Plates (FZPs) [3] are diffractive lenses characterized by a fractal focal structure with an extended focal depth, as compared with Fresnel lenses. This behaviour predicts an ...
متن کاملCompact Zernike phase contrast x-ray microscopy using a single-element optic.
We demonstrate Zernike phase contrast in a compact soft x-ray microscope using a single-element optic. The optic is a combined imaging zone plate and a Zernike phase plate and does not require any additional alignment or components. Contrast is increased and inversed in an image of a test object using the Zernike zone plate. This type of optic may be implemented into any existing x-ray microsco...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2008
ISSN: 1094-4087
DOI: 10.1364/oe.16.001559