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- Fresnel_Imager abstract "A Fresnel imager is a proposed ultra-lightweight design for a space telescope that uses a Fresnel array as primary optics instead of a typical lens. It focuses light with a thin opaque foil sheet punched with specially shaped holes, thus focusing light on a certain point by using the phenomenon of diffraction. Such patterned sheets, called Fresnel zone plates, have long been used for focusing laser beams, but have so far not been used for astronomy. No optical material is involved in the focusing process as in traditional telescopes. Rather, the light collected by the Fresnel array is concentrated on smaller classical optics (e.g. 1/20th of the array size), to form a final image.The long focal lengths of the Fresnel imager (a few kilometers) require operation by two-vessel formation flying in space at the L2 Sun-Earth Lagrangian point. In this two spacecraft formation-flying instrument, one spacecraft holds the focussing element: the Fresnel interferometric array; the other spacecraft holds the field optics, focal instrumentation, and detectors.".
- Fresnel_Imager wikiPageExternalLink PropalFresnel-CosmicVision_20070706.pdf.
- Fresnel_Imager wikiPageExternalLink aa2880-05.pdf.
- Fresnel_Imager wikiPageExternalLink FresnelArraysPosterA4V3.pdf.
- Fresnel_Imager wikiPageExternalLink papierFresnelV1.pdf.
- Fresnel_Imager wikiPageID "24279120".
- Fresnel_Imager wikiPageLength "6844".
- Fresnel_Imager wikiPageOutDegree "20".
- Fresnel_Imager wikiPageRevisionID "699519835".
- Fresnel_Imager wikiPageWikiLink Augustin-Jean_Fresnel.
- Fresnel_Imager wikiPageWikiLink Category:European_Space_Agency.
- Fresnel_Imager wikiPageWikiLink Category:Interferometric_telescopes.
- Fresnel_Imager wikiPageWikiLink Category:Space_observatories.
- Fresnel_Imager wikiPageWikiLink Category:Ultraviolet_telescopes.
- Fresnel_Imager wikiPageWikiLink Cosmic_Vision.
- Fresnel_Imager wikiPageWikiLink Diffraction.
- Fresnel_Imager wikiPageWikiLink European_Space_Agency.
- Fresnel_Imager wikiPageWikiLink Fresnel_diffraction.
- Fresnel_Imager wikiPageWikiLink Fresnel_lens.
- Fresnel_Imager wikiPageWikiLink Fresnel_number.
- Fresnel_Imager wikiPageWikiLink Lagrangian_point.
- Fresnel_Imager wikiPageWikiLink Observatoire_Midi-Pyrénées.
- Fresnel_Imager wikiPageWikiLink Solar_System.
- Fresnel_Imager wikiPageWikiLink Telescope.
- Fresnel_Imager wikiPageWikiLink Ultraviolet.
- Fresnel_Imager wikiPageWikiLink Zone_plate.
- Fresnel_Imager wikiPageWikiLinkText "Fresnel Imager".
- Fresnel_Imager wikiPageWikiLinkText "Fresnel imager".
- Fresnel_Imager wikiPageUsesTemplate Template:ESA_projects.
- Fresnel_Imager wikiPageUsesTemplate Template:Reflist.
- Fresnel_Imager wikiPageUsesTemplate Template:Space_observatories.
- Fresnel_Imager subject Category:European_Space_Agency.
- Fresnel_Imager subject Category:Interferometric_telescopes.
- Fresnel_Imager subject Category:Space_observatories.
- Fresnel_Imager subject Category:Ultraviolet_telescopes.
- Fresnel_Imager hypernym Design.
- Fresnel_Imager type Agency.
- Fresnel_Imager type Interferometer.
- Fresnel_Imager type Organization.
- Fresnel_Imager type Programme.
- Fresnel_Imager type Redirect.
- Fresnel_Imager type Organization.
- Fresnel_Imager comment "A Fresnel imager is a proposed ultra-lightweight design for a space telescope that uses a Fresnel array as primary optics instead of a typical lens. It focuses light with a thin opaque foil sheet punched with specially shaped holes, thus focusing light on a certain point by using the phenomenon of diffraction. Such patterned sheets, called Fresnel zone plates, have long been used for focusing laser beams, but have so far not been used for astronomy.".
- Fresnel_Imager label "Fresnel Imager".
- Fresnel_Imager sameAs Q5503150.
- Fresnel_Imager sameAs m.07s83l8.
- Fresnel_Imager sameAs Q5503150.
- Fresnel_Imager wasDerivedFrom Fresnel_Imager?oldid=699519835.
- Fresnel_Imager isPrimaryTopicOf Fresnel_Imager.