نتایج جستجو برای: ray optics
تعداد نتایج: 332908 فیلتر نتایج به سال:
X-ray mirrors are widely used at synchrotron radiation sources for focusing X-rays into focal spots of size less than 1 µm. The ability of the beamline optics to change the size of this spot over a range up to tens of micrometres can be an advantage for many experiments such as X-ray microprobe and X-ray diffraction from micrometre-scale crystals. It is a requirement that the beam size change s...
Applications S.D. Padiyar, Hui Wang, M.V. Gubarev,* W.M. Gibson, and C.A. MacDonald Center for X-ray Optics, University at Albany, State University Of New York at Albany, 1400 Washington Avenue, Albany, New York 12222 *Currently at Marshall Space Flight Center, Huntsville, Alabama 35824. Abstract Polycapillary optics, arrays of thin-walled, hollow borosilicate glass channels, can be employed to...
We present a transformation optics approach for molding the light flow at the deep-subwavelength scale, using metamaterials with uniquely designed dispersion. By conformal transformation of the electromagnetic space, we develop a methodology for realizing subwavelength ray optics with curved ray trajectories. This enables deep-subwavelength-scale beams to flow through two- or three-dimensional ...
We study the ray optics of generalized lenses (glenses), which are ideal thin lenses generalized to have different object- and image-sided focal lengths, and the most general light-ray-direction-changing surfaces that stigmatically image any point in object space to a corresponding point in image space. Gabor superlenses [UK patent541,753 (1940); J. Opt. A1, 94 (1999)JOAOF81464-425810.1088/1464...
It has been almost one hundred years since Einstein formulated his special theory of relativity in 1905. He showed that the basic space-time symmetry is dictated by the Lorentz group. It is shown that this group of Lorentz transformations is not only applicable to special relativity, but also constitutes the scientific language for optical sciences. It is noted that coherent and squeezed states...
Abstract Revolution in X-Ray OpticsThe past half-decade has witnessed a technological revolution in our abilityto generate, control , manipulate, focus, and detect x rays. The emergence ofx-ray lasers and synchrotron insertion devices has increased the brightness oflaboratory x-ray sources eight to twelve orders of magnitude. Also, significantadvances have occurred in th...
Due to their short wavelength, X-rays can in principle be focused down to a few nanometres and below. At the same time, it is this short wavelength that puts stringent requirements on X-ray optics and their metrology. Both are limited by today's technology. In this work, we present accurate at wavelength measurements of residual aberrations of a refractive X-ray lens using ptychography to manuf...
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