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Fresnel zone plates - x-ray-optics.de
- http://www.x-ray-optics.de/index.php/en/types-of-optics/diffracting-optics/fresnel-zone-plates
- Fig. 1: Focusing X-rays with a diffracting zone plate . As for visible light, Fresnel zone plates for X-rays can be absorbing or phase shifting. Absorbing zone plates are more common in the X-ray range. They are made of an X-ray absorbing material, e. g. some micrometers gold, on a membrane transparent for X-rays, e. g. Si 3 N 4. Normally the absorber metal is structured by …
Fresnel zone plate theory, generation, tolerancing, …
- http://zoneplate.lbl.gov/
- Fresnel zone plate theory and equations. Learn about zone locations, resolution, bandwidth restrictions, and field of view. Learn more. Generator. An easy-to-use Fresnel zone plate generator / calculator that creates zone plate GDS files to match the wavelength, imaging conjugates, and constraints that you provide.
Zone Plate
- https://zoneplates.com/zone%20plate.html
- A Fresnel Zone Plate (ZP) is a circular diffraction grating, with radially varying line period such that the diffracted light forms a focal spot at some distance f from the ZP. In diffraction limited conditions, the size of the focal spot is equal to 1.22 * drn , where drn is the width of the outermost zone of the ZonePlate.
Use of a Fresnel zone plate for optical image formation …
- https://pubmed.ncbi.nlm.nih.gov/20168637/
- Use of a Fresnel zone plate for optical image formation with short wavelength radiations Appl Opt. 1977 Apr 1;16(4):1070-3. doi: 10.1364/AO.16.001070. ... In typical experiments with narrow field objects, it is shown that the zone plate behaves like a diffraction-limited lens, the gain in resolution is noticeable as the wavelength decreases ...
Zone Plates - RP Photonics
- https://www.rp-photonics.com/zone_plates.html
- Fresnel zone plates are optical devices for focusing light (or other electromagnetic radiation) based on diffraction. They are used particularly in extreme spectral regions, where …
lens - What is a zone plate? - Photography Stack Exchange
- https://photo.stackexchange.com/questions/11552/what-is-a-zone-plate
- A zone plate is a way of focusing light, like a lens, but using Fresnel diffraction instead of refraction. This is cool from a theoretical point of view, because it demonstrates the wave nature of light. And it's cool from a photography point of view, because the images produced have a unique glow, with an impressionistic almost-painted look.
Fresnel Lenses & Zone Plates - Eastjesus
- http://www.eastjesus.net/tech/imo/Fresnel.htm
- Zone plate with varying density as a function of phase. On a practical level, Fresnel lenses are most useful for creating very large lensing components where the more traditional lens would not be practical. The Fresnel zone plate, on the other hand, is …
Image Grating Metrology Using a Fresnel Zone Plate
- http://snl.mit.edu/pub/theses/CJ-Thesis.pdf
- proposed. The Fresnel zone plate is a circularly symmetric diffraction grating that contains a wide range of spatial frequencies. The work begins with a basic under-standing of the zone plate, followed by the physics of the image metrology. Closed mathematical solution is obtained to describe the diffraction pattern of incident plane waves by a Fresnel zone plate. For a given …
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