The potential diffraction-limited angular resolution of an X-ray telescope with aperture diameter D =1 m operating at 1 keV is Δθ≈λ∕ D =260 μ arc seconds, but to achieve such an impressive performance requires X-ray optics with unprecedented precision and quality. Fourier optics analysis...
(SPIE v.4849 215 2002; SPIE v. 5166 202 2003). This decision has been driven by the need for a diffraction limited angular field size of the order of one degree, combined with the need for rather large telephoto advantage: to match the pixel sizes to the diffraction spot size a focal...
the same PSF can be used for different objects unless the object plane is changed. Limited FOV is another restriction, which is set by the angular memory effect, namely the decorrelation of the scattered intensity field. However, because the limited FOV is set on the field angle, and also ...
Owing to the helical phase term, the central lobe of this beam carries orbital angular momentum with topological charge l = 1. The measured dark core size with rπ = 0.70rmax is Eð2397 58Þnm, more than a factor of 1.3 smaller than the achieved core with a diffraction-limited beam...
Blaze is defined as the concentration of a limited region of the spectrum into any order other than the zero order. Blazed gratings are manufactured to produce maximum efficiency at designated wavelengths. A grating may, therefore, be described as “blazed at 250 nm” or “blazed at 1 micron...
In the case of sensitive samples or complex sample environments, the sample is held stationary and both tube and detector rotate with angular speed θ in opposite directions (θ/θ diffractometer). The divergent X-ray beam is limited by a set of slits reducing the lateral (divergence slit) ...
The wavelength resolution of a grating-tuned external cavity is determined by the angular dispersion multiplied by the acceptance angle for coupling back into the gain medium active region. The angular dispersion can therefore be used as a figure of merit, but it must be remembered that the param...
Due to the instrument's excellent laser system design with 92 detectors and a very wide angular range from 0.016° to 165°, it achieves a measurement range from 0.02 μm to 2,600 μm, covering both nano and millimeter scales. 2.2High Resolution ...
For soft X-ray, the HODs of zone plates have been used to enhance imaging resolution22, which, however, is still diffraction-limited due to the lack of independent manipulation of HODs. Here, we manipulate the HOD of a flat lens through its analytical width of the zone so that the same...
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited ThesaurusAntonymsRelated WordsSynonymsLegend: Switch tonew thesaurus Noun1. diffraction- when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light...