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graticule

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
graticule
Graduated transparent scale engraved or photographed, placed in the front focal plane of the eyepiece of an optical instrument for direct observation of the apparent image size or position in the field of view. Example: the focusing screen of a focimeter. Syn. reticule.
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He also donated a cross bar micrometer graticule jig, his bifilar micrometer, his chronograph and a handheld terrestrial telescope which was later auctioned via Sotheby's.
Will Hay (1888-1949) and his telescopes by Mobberley, Martin P.; Goward, Kenneth J. / Journal of the British Astronomical Association
Under a binocular dissecting microscope, two mutually perpendicular lengths across the eyeball (the distances between tangents to its outer surface) were measured using the parallel lines of an eyepiece graticule.
Stereology and some structural correlates of retinal and ... by Mayhew, Terry M. / Image Analysis and Stereology
Above this is attached a movable 'rete', a kind of openwork graticule bearing little curlicued pointers identifying the positions of the bright stars.
The Astrolabe by Glass, Ian / Monthly Notes of the Astronomical Society of Southern Africa
 
 
 
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