- A
dioptra (sometimes also
named dioptre or diopter, from Gr****: διόπτρα) is a
classical astronomical and
surveying instrument,
dating from the 3rd century...
-
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....
- and
angles were
measured using a
sighting rod that the Gr****s
called a
dioptra, the
forerunner of the
Arabic alidade. A
detailed contemporary collection...
-
Instruments used in
surveying include:
Alidade Alidade table Cosmolabe Dioptra Dumpy level Engineer's
chain Geodimeter Graphometer Groma (surveying) Laser...
- is
often attributed to Hipparchus. A
combination of the
planisphere and
dioptra, the
astrolabe was
effectively an
analog computer capable of
working out...
- 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...
-
photography A
theodolite or
similar surveyor's
angle measuring device A
dioptra, an old
surveying device An
alidade A
surgical speculum An
instrument for...
-
Dioptra Island (Bulgarian: остров Диоптра, romanized: ostrov
Dioptra, IPA: [ˈɔstrov
diˈɔptrɐ]) is the con****uous 290 m long in east-west
direction and...
- year.
Anathem Armillary sphere De
architectura Epicycle Lemniscate On the
Dioptra The word is rare in English, not to be
found in most dictionaries. The...
- the
direct light from a star Cosmolabe –
Ancient astronomical instrument Dioptra –
classical surveying instrument from the 3rd
century BCE
Equatorial ring –...
