A dioptra (sometimes also named dioptre or diopter, from Greek: διόπτρα) is a classical astronomical and surveying instrument, dating from the 3rd century...
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Hero of Alexandria (redirect from On the Dioptra)
observed in Alexandria and Rome used as a hypothetical example in Hero's Dioptra, and found that it best matched the details of an eclipse in 62 AD; A....
26 KB (2,937 words) - 17:14, 14 August 2024
Instruments used in surveying include: Alidade Alidade table Cosmolabe Dioptra Dumpy level Engineer's chain Geodimeter Graphometer Groma (surveying) Laser...
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and angles were measured using a sighting rod that the Greeks called a dioptra, the forerunner of the Arabic alidade. A detailed contemporary collection...
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is often attributed to Hipparchus. A combination of the planisphere and dioptra, the astrolabe was effectively an analog computer capable of working out...
135 KB (13,741 words) - 22:18, 26 August 2024
designed. In old texts, the speculum may also be referred to as a diopter or dioptra. Like an endoscope, a speculum allows a view inside the body; endoscopes...
13 KB (1,451 words) - 13:08, 27 August 2024
Diopter (disambiguation) (redirect from Dioptra (disambiguation))
photography A theodolite or similar surveyor's angle measuring device A dioptra, an old surveying device An alidade A surgical speculum An instrument for...
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Dioptra Island (Bulgarian: остров Диоптра, romanized: ostrov Dioptra, IPA: [ˈɔstrov diˈɔptrɐ]) is the conspicuous 290 m long in east-west direction and...
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the direct light from a star Cosmolabe – Ancient astronomical instrument Dioptra – Classical surveying instrument from the 3rd century BCE Equatorial ring –...
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Instruments Armillary sphere Astrolabe Celestial globe Compass Cross-staff Dioptra Equatorial ring Equatorial sundial Globe Gnomon Mural instrument Quadrant...
33 KB (3,102 words) - 03:41, 15 June 2024