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Type of optical telescope
A refracting telescope (also called a refractor or dioptric telescope) is a type of optical telescope that uses a lens as its objective to form an image
Refracting_telescope
invention soon spread across Europe. The design of these early refracting telescopes consisted of a convex objective lens and a concave eyepiece. Galileo
History_of_the_telescope
the aperture. The second largest refracting telescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific
List of largest optical refracting telescopes
List_of_largest_optical_refracting_telescopes
Instrument that makes distant objects appear magnified
reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. In the 20th
Telescope
Astronomical observatory in Wisconsin, USA
doublet lens refracting telescope, the largest refractor ever successfully used for astronomical observation. The Swedish 1-m Solar Telescope in the Canary
Yerkes_Observatory
Italian physicist and astronomer (1564–1642)
others, among the first to use a refracting telescope as an instrument to observe stars, planets or moons. The name "telescope" was coined for Galileo's instrument
Galileo_Galilei
Type of reflecting telescope
eyepiece. They are free of chromatic aberration found in refracting telescopes. Newtonian telescopes are usually less expensive for any given objective diameter
Newtonian_telescope
Astronomical observatory in Nice, France
1880s). In the records for the largest refracting telescopes, all three were outperformed by the 91 cm (36 in) refractor installed at the Lick Observatory
Nice_Observatory
Telescope for observations with visible light
types of optical telescope : Refracting telescopes, which use lenses and less commonly also prisms (dioptrics) Reflecting telescopes, which use mirrors
Optical_telescope
Telescopes which utilize curved mirrors to form an image
image. The reflecting telescope was invented in the 17th century by Isaac Newton as an alternative to the refracting telescope which, at that time, was
Reflecting_telescope
Large telescope with a lens
century. Great refractors were large refracting telescopes using achromatic lenses (as opposed to the mirrors of reflecting telescopes). They were often
Great_refractor
Atmospheric Cherenkov telescope used to detect gamma rays Infrared telescope Radio telescope Submillimeter telescope Ultraviolet telescope (see also Ultraviolet
List_of_telescope_types
Telescope in California, United States
The James Lick Telescope is a refracting telescope built in 1888. It has a lens, which is 91 centimetres (36 in) in diameter—a major achievement in its
James_Lick_telescope
English design engineer
Zerochromat retrofocally corrected refractor, including a folded 30-inch f/12 version he built in 1999. This refracting telescope is the largest ever built by
John_Wall_(inventor)
for taking the first photograph of the solar eclipse with a small refracting telescope. Nicholls, Will (2017-08-05). "This First-Ever Solar Eclipse Photo
Julius_Berkowski
Largest practical refracting telescope, the Yerkes Observatorys' 40 inch (101.6 cm) refractor, is built. 1900 — The largest refractor ever, Great Paris
Timeline of telescope technology
Timeline_of_telescope_technology
World's largest telescopes
telescope Lists of telescopes List of optical telescopes List of largest optical reflecting telescopes List of largest optical refracting telescopes List
List of largest optical telescopes historically
List_of_largest_optical_telescopes_historically
Optical sighting device for firearms
called a scope informally, is an optical sighting device based on a refracting telescope. Sights are equipped with a referencing pattern (reticle) mounted
Telescopic_sight
Refractor telescope in California, US
The Carnegie telescope (i.e. Carnegie double astrograph) is a twin 20-inch (510 mm) refractor telescope located at Lick Observatory in California, United
Carnegie_telescope
Astronomical observatory and historic landmark in Arizona, US
discovered in 1930 by Clyde Tombaugh. Lowell is home to a 24-inch Clark Refracting Telescope, built in 1896, which is still in use today for public observing
Lowell_Observatory
Science center in California
(Present) Observatory built: 2000, at Skyline Boulevard Leah Type - Refracting telescope Maker - Alvan Clark & Sons, 1883 Aperture – 8 inches Focal Length
Chabot Space and Science Center
Chabot_Space_and_Science_Center
Refractor in the Penteli Observatory, Greece
for Robert Stirling Newall and when completed it was the largest refracting telescope in the world. It was located at Newall's private observatory until
Newall_Telescope
Historic site in New South Wales, Australia
(16 in) Schmidt-Cassegrain telescope and an historic 29-centimetre (11 in) refractor telescope built in 1874, the oldest telescope in Australia in regular
Sydney_Observatory
optical telescopes in North America. A list of optical telescopes located in North America by aperture. Some of the big traditional refracting lens telescopes
List of the largest optical telescopes in North America
List_of_the_largest_optical_telescopes_in_North_America
German astronomer and mathematician (1571–1630)
refracting telescope, the Keplerian telescope, which became the foundation of the modern refracting telescope, while also improving on the telescope design
Johannes_Kepler
Historic 6-inch refracting telescope
The Napoleon III Telescope is an historic 6-inch refracting telescope owned by the University of Notre Dame. The telescope was given to the university
Napoleon III Telescope (University of Notre Dame)
Napoleon_III_Telescope_(University_of_Notre_Dame)
Refracting telescope design that reduces chromatic aberration
The achromatic telescope is a refracting telescope that uses an achromatic lens to correct for chromatic aberration. When an image passes through a lens
Achromatic_telescope
Double telescope in Meudon, France
Refractor (also known as the Grande Lunette) is a double telescope with lenses (83 cm + 62 cm), in Meudon, France. It is a twin refracting telescope built
Meudon_Great_Refractor
Tubeless telescope (17th century)
An aerial telescope is a type of very long focal length refracting telescope, built in the second half of the 17th century, that did not use a tube. Instead
Aerial_telescope
Telescope at Paris Observatory, installed in 1857
Arago telescope (Lunette Arago) is a 38 cm (15 inch) aperture refracting telescope at Paris Observatory, installed in 1857. Francois Arago ordered this
Arago_telescope
of the world Selected largest telescopes Sidereal Messenger Large refracting telescopes (date 1884) Portals: Astronomy Stars Outer space Solar System
List of largest optical reflecting telescopes
List_of_largest_optical_reflecting_telescopes
optical refracting telescopes List of optical telescopes List of proposed space telescopes List of radio telescopes List of solar telescopes List of space
Lists_of_telescopes
Type of telescope mount
telescope", which was a very long focal length refracting telescope that did not use a tube. In these telescopes a hand held eyepiece and an objective mounted
Infinite-axis_telescope
Observatory in London, England
ball. 1838 - Sheepshanks equatorial, a 6.7 inches (170 mm) aperture refracting telescope installed. 1852 - Time signals were distributed through telegraph
Royal_Observatory,_Greenwich
Type of catadioptric telescope
instrument with the long focal length of a refracting telescope with the lower cost per aperture of a reflecting telescope. The compact design makes it very portable
Schmidt–Cassegrain_telescope
Emergence of modern science (1572-1687)
Gregorian telescope was built. In 1666, Newton argued that the faults of the refracting telescope were fundamental because the lens refracted light of
Scientific_Revolution
a telescope. Objective: The first lens or curved mirror that collects and focuses the incoming light. Primary lens: The objective of a refracting telescope
List of telescope parts and construction
List_of_telescope_parts_and_construction
Largest refracting telescope in history
Great Paris Exhibition Telescope of 1900, with an objective lens of 1.25 m (49 in) in diameter, was the largest refracting telescope ever constructed. It
Great Paris Exhibition Telescope of 1900
Great_Paris_Exhibition_Telescope_of_1900
Telescope at the Royal Observatory, Greenwich, England
The Greenwich 28-inch refractor is a telescope at the Royal Observatory, Greenwich, where it was first installed in 1893. It is a 28-inch ( 71 cm) aperture
Greenwich_28-inch_refractor
Observatory in Denver, Colorado, US
began in 1890. The 20-inch objective lens for the observatory's main refracting telescope was made by Alvan Clark & Sons, and the mount was built by George
Chamberlin_Observatory
Instrument in space to study astronomical objects
obstruction by clouds, and distortions due to atmospheric refraction such as twinkling. Space telescopes can also observe dim objects during the daytime, and
Space_telescope
Observatory in Ottawa, Canada
Observatory in Britain. The main instrument was a 15-inch refracting telescope, the largest refractor ever installed in Canada, although modest compared to
Dominion_Observatory
an optical refracting telescope, the first recorded functional telescope 1609 – Galileo Galilei builds his first optical refracting telescope 1616 – Niccolò
Timeline of telescopes, observatories, and observing technology
Timeline_of_telescopes,_observatories,_and_observing_technology
Branch of physics that studies light
appears three dimensional when used by humans. The first telescopes, called refracting telescopes, were also developed with a single objective and eyepiece
Optics
reflecting telescopes – List of large optical telescopes List of largest optical refracting telescopes List of space telescopes List of solar telescopes List
Lists_of_optical_telescopes
German-Dutch lens crafter (1570–1619)
1619. Hans Lipperhey is known for the earliest written record of a refracting telescope, a patent he filed in 1608. His work with optical devices grew out
Hans_Lipperhey
Optical device
A monocular is a compact refracting telescope used to magnify images of distant objects, typically using an optical prism to ensure an erect image, instead
Monocular
American astronomer and instrument maker
Sons, made many of the record-breaking refracting instruments, including the still-largest refracting telescope at the Yerkes Observatory, gaining "worldwide
George_Bassett_Clark
Observatory in Manchester, England
telescopes made by Grubb of Dublin: a Newtonian telescope that uses a concave primary mirror and a flat diagonal secondary mirror, and a refracting telescope
Godlee_Observatory
Optical devices treating collimated light
Telescopic beam expanders include refracting and reflective telescopes. A refracting telescope commonly used is the Galilean telescope which can function as a simple
Beam_expander
Property in optics
des Brechungsverhältnisses is index of refraction Brewster, David (1815). "On the structure of doubly refracting crystals". Philosophical Magazine. 45
Refractive_index
Optical device which transmits and refracts light
the refracting telescope in 1608, both of which appeared in the spectacle-making centres in the Netherlands. With the invention of the telescope and microscope
Lens
American businessman, author, mathematician, and astronomer (1855–1916)
refracting telescope was installed at his new Flagstaff, Arizona observatory. Lowell observed the planet high in the daytime sky with the telescope's
Percival_Lowell
Townland near Dublin, Ireland
institution in Ireland. The observatory houses a 12-inch (30 cm) refracting telescope which was built by Grubbs of Dublin using a French manufactured lens
Dunsink
Optical system where refraction and reflection are combined
type of catadioptric telescope. They consist of a single-element refracting telescope objective combined with a silver-backed negative lens (similar to
Catadioptric_system
Line of Maksutov-Cassegrain telescopes
expanded to 105 mm, and 125 mm Maksutov Cassegrains and achromatic refracting telescopes in sizes of 60 mm and 70 mm, but these two models were later replaced
Meade_ETX_telescope
light, and which tarnished, requiring maintenance. Two-element refracting telescopes were extensively used in 19th century observatories despite their
List of largest optical telescopes in the 19th century
List_of_largest_optical_telescopes_in_the_19th_century
Closest known white dwarf star to Earth
Observatory, which was one of the largest refracting telescope lenses in existence at the time, and the largest telescope in the United States. Sirius B's sighting
Sirius_B
Observatory in Cincinnati, Ohio, US
buildings housing an 11-inch (28 cm) and 16 inch (41 cm) aperture refracting telescope. It is the oldest professional observatory in the United States.
Cincinnati_Observatory
that sometimes afflicts very large refracting telescopes. It is the equivalent of mirror sag in reflecting telescopes. It occurs when the physical weight
Lens_sag
Topics referred to by the same term
singer Another term for a hand-held refracting telescope for terrestrial observation A monocular, a compact refractor "Spy Glass", a recurring sketch on
Spyglass
Observatory
observatory's facilities by commissioning a 218mm Merz Equatorial Refracting Telescope to the German constructor Georg Merz. In 1946 the observatory became
Brera Astronomical Observatory
Brera_Astronomical_Observatory
Imaging of astronomical objects
century saw the worldwide construction of refracting telescopes and sophisticated large reflecting telescopes specifically designed for photographic imaging
Astrophotography
professional-level research is performed with refracting telescopes in the modern era of astronomy. Small telescopes dominate astronomical research in the fields
Small_telescope
Observatory
sandstone and has a distinctive 7 m dome, which houses a Victorian refracting telescope, a small planetarium, and display areas. The dome is one of two made
Mills_Observatory
Sighting device used in astronomy and stargazing
stargazing, typically a small auxiliary refracting telescope/monocular mounted parallelly on a larger astronomical telescope along the same line of sight. The
Finderscope
Mechanism in a telescope's mount
equatorial mount", making it the prototype of all future large refracting telescopes. Early telescope clock drives used a clock work with falling weights and
Clock_drive
Observatory
observations. It boasted of an 8" Cooke Astrograph and a 15" Grubb refractor telescope. It was founded by Nawab Zafar Yar Jung Bahadur, a rich Nobleman
Nizamia_observatory
X-ray source magnifier
travel nearly perpendicular to the reflecting or refracting surface. Conventional mirror telescopes work poorly with X-rays, since X-rays that strike
Wolter_telescope
simple refracting telescope for field use, designed by Major Baden-Powell, F.R.A.S.. Consisting of only one lens, it is the simplest of all telescopes, and
Baden-Powell's_unilens
Type of lens
proposed in 1817 by the mathematician Carl Friedrich Gauss for a refracting telescope design, but was seldom implemented and is better known as the basis
Gauss_lens
Telescope built in 1791
The Shuckburgh telescope or Shuckburgh equatorial refracting telescope was a 4.1 inches (10.4 cm) diameter aperture telescope on an equatorial mount completed
Shuckburgh_telescope
American solar astronomer (1868–1938)
world-leading telescopes: the 40-inch refracting telescope at Yerkes Observatory; the 60-inch Hale and 100-inch Hooker reflecting telescopes, both at Mount
George_Ellery_Hale
First successful mirror telescope
that the lens of any refracting telescope would suffer from the dispersion of light into colours (chromatic aberration). The telescope he constructed used
Newton's_reflector
Bavarian optician (1793–1867)
Merz and Sons, vintage 7¼″ refracting telescope at the Sydney Observatory Georg Merz and Sons, vintage refracting telescope at the Quito Astronomical Observatory
Georg_Merz
Diffuse nebula in the constellation Orion
Peiresc, on November 26, 1610, when he recorded observing it with a refracting telescope purchased by his patron Guillaume du Vair. The first published observation
Orion_Nebula
American maker of optics
that became famous for crafting lenses for some of the largest refracting telescopes of the 19th and early 20th centuries. Founded in 1846 in Cambridgeport
Alvan_Clark_&_Sons
Physical phenomenon relating to the direction of waves
In physics, refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed
Refraction
Research facility for astrophysics in Germany
Berlin, though the Einstein Tower solar observatory and the great refractor telescope on Telegrafenberg in Potsdam belong to the AIP. The key topics of
Leibniz Institute for Astrophysics Potsdam
Leibniz_Institute_for_Astrophysics_Potsdam
Observatory in Los Angeles, California
have looked through the 12-inch (30.5 cm) Zeiss refracting scope, making it the most viewed telescope in the world. The space theme prevails in the interior
Griffith_Observatory
1850s telescope near London, England
uniquely designed telescope with nearly double the aperture of the next largest refracting telescopes, making it the largest refracting telescope in the World
Craig_telescope
Telescope on La Plama, Canary Islands
The Swedish Solar Telescope (SST), also known as the Swedish 1-meter Solar Telescope, is a refracting solar telescope at Roque de los Muchachos Observatory
Swedish_Solar_Telescope
Dutch mathematician and physicist (1629–1695)
Huygens began grinding lenses with his brother Constantijn to build refracting telescopes. He discovered Saturn's biggest moon, Titan, and was the first to
Christiaan_Huygens
British lawyer and inventor
He used the achromatic lens to build the first achromatic telescope, a refracting telescope free from chromatic aberration (colour distortion). He lived
Chester_Moore_Hall
Pair of telescopes mounted side-by-side
Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use
Binoculars
United States historic place
purchase a new refracting telescope as their old telescope, a 9.6in refractor, had been outdated since its purchase. The new telescope was purchased from
Old_Naval_Observatory
British instrument maker
refractor for Robert Stirling Newall; sadly, Thomas died before seeing it completed. For some years the Newall was the largest refracting telescope in
Thomas Cooke (scientific instrument maker)
Thomas_Cooke_(scientific_instrument_maker)
19th-century American astronomer
its motion. Clark used the largest refracting telescope lens in existence at the time, and the largest telescope in the United States, to observe the
Alvan_Graham_Clark
German physicist (1787–1826)
Merz & Mahler Refracting Telescope (Comet Seeker)". National Museum of American History. "Utzschneider, Reichenbach and Fraunhofer Telescope". National Museum
Joseph_von_Fraunhofer
Telescope in the Palomar Observatory
wavelengths.[when?] The telescope was originally hand-guided through one of two 10-inch-aperture (0.25 m) refracting telescopes mounted on either side
Samuel_Oschin_telescope
Brightest star in Earth's night sky
5-inch (470 mm) aperture great refractor telescope for Dearborn Observatory, which was one of the largest refracting telescope lenses in existence at the
Sirius
Astronomical observatory in Airdrie, Scotland
and Jack Frederick. Airdrie Observatory is home to a 6" Victorian refracting telescope with an equatorial mount and clockwork drive which is used to track
Airdrie_Observatory
TAL-200K, TAL-250K); Achromatic refracting telescopes with apertures 75, 100 and 125 mm, apochromatic refracting telescopes on plain glasses 125 and 150
Novosibirsk Instrument-Building Plant
Novosibirsk_Instrument-Building_Plant
American manufacturer
Observatory (according to the 50th-anniversary book, this was a 40-inch refracting telescope completed in time for display at the World's Columbian Exposition
Warner_&_Swasey_Company
Research institution in Pennsylvania, US
Pittsburgh's Digital Research Library 360° panorama of the Thaw Memorial Refractor telescope in the main dome Archived June 29, 2011, at the Wayback Machine Pittsburgh
Allegheny_Observatory
In 1923 a 6-inch Cooke refracting telescope was presented to the Society by George Avenell and remains the primary telescope in use at the Hampstead
Hampstead_Scientific_Society
Highly reflective copper-tin alloy
impracticalities in using the metal made most astronomers prefer their smaller refracting telescope counterparts. Speculum metal was very hard to cast and shape. It
Speculum_metal
Telescope accessory used to improve details of viewed objects
must be securely fitted over the objective of a refracting telescope or aperture of a reflecting telescope so that the body does not heat up significantly
Astronomical_filter
Manufacturer of telescopes, etc., based in Watsonville, California
John Diebel, Meade started as a mail order seller of small refracting telescopes and telescope accessories manufactured by the Japan-based Towa Optical
Meade_Instruments
Deviation of light as it moves through the atmosphere
is possible to equip an optical telescope with control systems to compensate for the shift caused by the refraction. If the dispersion is also a problem
Atmospheric_refraction
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REFRACTING TELESCOPE
REFRACTING TELESCOPE
REFRACTING TELESCOPE
REFRACTING TELESCOPE
REFRACTING TELESCOPE
REFRACTING TELESCOPE
REFRACTING TELESCOPE
REFRACTING TELESCOPE
REFRACTING TELESCOPE
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