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- Depth-graded_multilayer_coating abstract "A depth-graded multilayer coating is a multi-layer coating optimised for broadband response by varying the thickness of the layers used.A multi-layer coating consisting of alternating layers with different optical properties and the same thickness will tend to have a narrow frequency response, getting narrower as more layers are added; for some applications such as precise focussing of a monochromatic laser light source this is exactly what's desired, but it is useless for astronomical optics where it is often required to detect a whole range of frequencies emitted by some source of interest.The design of such coatings generally starts with an approximate analytical solution and then uses the simplex method of multi-variable optimisation to solve for optimal thicknesses of the layers. Typically the thin layers (to reflect high-energy X-rays) are on the inside since low-energy X-rays are absorbed more readily. One model used is a power law distribution of thicknesses, with the thickness of the ith bilayer as a/(b+i)^c for some optimised a, b, c.An optimum multilayer design depends on the graze angle, so ideally a different prescription would be used on each shell of a multi-shell X-ray Wolter mirror; in practice the same prescription is used for about ten shells.Characterising such coatings requires a synchrotron as a variable-wavelength X-ray source.The Danish Space Research Institute in Copenhagen is (in 2012) the world centre of excellence for such coatings, though a good deal of the earlier research and development was done in Russia.".
- Depth-graded_multilayer_coating wikiPageID "36084530".
- Depth-graded_multilayer_coating wikiPageLength "2226".
- Depth-graded_multilayer_coating wikiPageOutDegree "9".
- Depth-graded_multilayer_coating wikiPageRevisionID "622238258".
- Depth-graded_multilayer_coating wikiPageWikiLink Broadband.
- Depth-graded_multilayer_coating wikiPageWikiLink Category:Thin-film_optics.
- Depth-graded_multilayer_coating wikiPageWikiLink Copenhagen.
- Depth-graded_multilayer_coating wikiPageWikiLink Danish_Space_Research_Institute.
- Depth-graded_multilayer_coating wikiPageWikiLink Frequency.
- Depth-graded_multilayer_coating wikiPageWikiLink Laser.
- Depth-graded_multilayer_coating wikiPageWikiLink Optical_coating.
- Depth-graded_multilayer_coating wikiPageWikiLink Russia.
- Depth-graded_multilayer_coating wikiPageWikiLink Synchrotron.
- Depth-graded_multilayer_coating wikiPageWikiLinkText "depth-graded multilayers".
- Depth-graded_multilayer_coating wikiPageUsesTemplate Template:Refimprove.
- Depth-graded_multilayer_coating subject Category:Thin-film_optics.
- Depth-graded_multilayer_coating hypernym Coating.
- Depth-graded_multilayer_coating type Company.
- Depth-graded_multilayer_coating type Film.
- Depth-graded_multilayer_coating type Film.
- Depth-graded_multilayer_coating comment "A depth-graded multilayer coating is a multi-layer coating optimised for broadband response by varying the thickness of the layers used.A multi-layer coating consisting of alternating layers with different optical properties and the same thickness will tend to have a narrow frequency response, getting narrower as more layers are added; for some applications such as precise focussing of a monochromatic laser light source this is exactly what's desired, but it is useless for astronomical optics where it is often required to detect a whole range of frequencies emitted by some source of interest.The design of such coatings generally starts with an approximate analytical solution and then uses the simplex method of multi-variable optimisation to solve for optimal thicknesses of the layers. ".
- Depth-graded_multilayer_coating label "Depth-graded multilayer coating".
- Depth-graded_multilayer_coating sameAs Q5260959.
- Depth-graded_multilayer_coating sameAs m.0j_3hlk.
- Depth-graded_multilayer_coating sameAs Q5260959.
- Depth-graded_multilayer_coating wasDerivedFrom Depth-graded_multilayer_coating?oldid=622238258.
- Depth-graded_multilayer_coating isPrimaryTopicOf Depth-graded_multilayer_coating.