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- Cheshire_eyepiece abstract "A Cheshire eyepiece or Cheshire collimator is a simple tool that helps aligning the optical axes of the mirrors or lenses of a telescope, a process called collimation. It consists of a peephole to be inserted into the focuser in place of the eyepiece. Through a lateral opening, ambient light falls on the brightly painted oblique back of the peephole. Images of this bright surface are reflected by the mirrors or lenses of the telescope and can thus be seen by a person peering through the hole. A Cheshire eyepiece contains no lenses or other polished optical surfaces. The tool was first described by F. J. Cheshire in 1921. It was repopularized in the 1980s and is now mass-produced. Amateur astronomers in particular use them to collimate reflecting or refracting telescopes.Some modern models of Cheshire eyepieces in common use include extended sight tubes and are equipped with crosshairs. When inserted into a Newtonian telescope whose primary mirror is marked in its center, such aids allow the user to adjust the position and tilt of both the secondary and the primary mirror.".
- Cheshire_eyepiece thumbnail Cheshire_telescope_collimation_tool.jpg?width=300.
- Cheshire_eyepiece wikiPageID "34255844".
- Cheshire_eyepiece wikiPageLength "2071".
- Cheshire_eyepiece wikiPageOutDegree "9".
- Cheshire_eyepiece wikiPageRevisionID "670341705".
- Cheshire_eyepiece wikiPageWikiLink Category:Optical_devices.
- Cheshire_eyepiece wikiPageWikiLink Collimated_light.
- Cheshire_eyepiece wikiPageWikiLink Newtonian_telescope.
- Cheshire_eyepiece wikiPageWikiLink Optical_axis.
- Cheshire_eyepiece wikiPageWikiLink Optical_telescope.
- Cheshire_eyepiece wikiPageWikiLink Primary_mirror.
- Cheshire_eyepiece wikiPageWikiLink Reflecting_telescope.
- Cheshire_eyepiece wikiPageWikiLink Refracting_telescope.
- Cheshire_eyepiece wikiPageWikiLink File:Cheshire_telescope_collimation_tool.jpg.
- Cheshire_eyepiece wikiPageWikiLinkText "Cheshire collimator".
- Cheshire_eyepiece wikiPageWikiLinkText "Cheshire eyepiece".
- Cheshire_eyepiece wikiPageUsesTemplate Template:Reflist.
- Cheshire_eyepiece subject Category:Optical_devices.
- Cheshire_eyepiece hypernym Tool.
- Cheshire_eyepiece type Software.
- Cheshire_eyepiece type Application.
- Cheshire_eyepiece comment "A Cheshire eyepiece or Cheshire collimator is a simple tool that helps aligning the optical axes of the mirrors or lenses of a telescope, a process called collimation. It consists of a peephole to be inserted into the focuser in place of the eyepiece. Through a lateral opening, ambient light falls on the brightly painted oblique back of the peephole. Images of this bright surface are reflected by the mirrors or lenses of the telescope and can thus be seen by a person peering through the hole.".
- Cheshire_eyepiece label "Cheshire eyepiece".
- Cheshire_eyepiece sameAs Q1070568.
- Cheshire_eyepiece sameAs Cheshire-Okular.
- Cheshire_eyepiece sameAs m.0hzrq4t.
- Cheshire_eyepiece sameAs Q1070568.
- Cheshire_eyepiece wasDerivedFrom Cheshire_eyepiece?oldid=670341705.
- Cheshire_eyepiece depiction Cheshire_telescope_collimation_tool.jpg.
- Cheshire_eyepiece isPrimaryTopicOf Cheshire_eyepiece.