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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
mirror. The achromatic lens, which greatly reduced chromatic aberrations in objective lenses and allowed for shorter and more functional telescopes, first
History_of_the_telescope
Lens that is designed to limit the effects of chromatic and spherical aberration
two parts together, noted the achromatic properties. Hall used the achromatic lens to build the first achromatic telescope, but his invention did not become
Achromatic_lens
A non-achromatic objective is an objective lens which is not corrected for chromatic aberration. In telescopes they can be pre-18th century simple single
Non-achromatic_objective
Type of optical telescope
with a refracting telescope, an astrograph with a 3 element 13-inch lens. Examples of some of the largest achromatic refracting telescopes, over 60 cm (24 in)
Refracting_telescope
Telescope for observations with visible light
often called the Keplerian Telescope. The next big step in the development of refractors was the advent of the achromatic lens in the early 18th century
Optical_telescope
Atmospheric Cherenkov telescope used to detect gamma rays Infrared telescope Radio telescope Submillimeter telescope Ultraviolet telescope (see also Ultraviolet
List_of_telescope_types
World's largest telescopes
75K/0000083.000.html Title: The invention and early development of the achromatic telescope, Author: King, H. C., Journal: Popular Astronomy, Vol. 56, p. 75
List of largest optical telescopes historically
List_of_largest_optical_telescopes_historically
telescopes within the field of amateur astronomy are considered to be small, ranging in general from 2-inch (50 mm) refracting achromatic telescopes,
Small_telescope
German physicist (1787–1826)
physicist and optical lens manufacturer. He made optical glass, an achromatic telescope, and objective lenses. He developed diffraction gratings and also
Joseph_von_Fraunhofer
Line of Maksutov-Cassegrain telescopes
been 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
Meade_ETX_telescope
British lawyer and inventor
first achromatic lenses in 1729 or 1733 (accounts differ). He used the achromatic lens to build the first achromatic telescope, a refracting telescope free
Chester_Moore_Hall
Failure of a lens to focus all colors on the same point
important step in the development of optical microscopes and telescopes. An alternative to achromatic doublets is the use of diffractive optical elements. Diffractive
Chromatic_aberration
Instrument that makes distant objects appear magnified
Newtonian reflector. John Dobson invented the Dobsonian telescope in 1956. The invention of the achromatic lens in 1733 partially corrected color aberrations
Telescope
Type of reflecting telescope
simpler than other telescope designs (Gregorians, cassegrains, and early refractors had two surfaces that need figuring. Later achromatic refractor objectives
Newtonian_telescope
Airspaced achromatic doublet lens design
make an achromatic lens since flint glass at that time was very expensive. Dialyte designs were also used in the Schupmann medial telescope designed
Dialyte_lens
telescope which is not directly comparable because it uses a single element non-achromatic lens, and the short-lived Great Paris Exhibition Telescope
List of largest optical refracting telescopes
List_of_largest_optical_refracting_telescopes
Catadioptric telescope design
The Maksutov (also called a "Mak") is a catadioptric telescope design that combines a spherical mirror with a weakly negative meniscus lens in a design
Maksutov_telescope
1st world's fair in 1851 in London, England
Ipswich. The instrument maker J. S. Marratt exhibited a five-foot achromatic telescope and a transit theodolite used in surveying, tunnelling, and for astronomical
Great_Exhibition
(Kellner's was solely achromatic rather than orthoscopic, despite his description). 1897 — Largest practical refracting telescope, the Yerkes Observatorys'
Timeline of telescope technology
Timeline_of_telescope_technology
Type of glass
compared to a singlet lens with the same focal length. History of the achromatic telescope John Dollond, who patented and commercialised the crown/flint doublet
Crown_glass_(optics)
Ujjain, Mathura, Madras 1733 – Chester Moore Hall invents the achromatic lens refracting telescope 1734 – Indian observatory of Sawai Jai Singh at Jaipur 1753
Timeline of telescopes, observatories, and observing technology
Timeline_of_telescopes,_observatories,_and_observing_technology
Bavarian optical-glass and scientific-instrument enterprise
assembly and testing. Its main products included achromatic objectives, the large front lenses of telescopes, designed to reduce coloured blur. The works
Optical Institute at Benediktbeuern
Optical_Institute_at_Benediktbeuern
until the mid-19th century. The main telescope technologies during this period were refractors with non-achromatic objectives (single lens), speculum metal
List of largest optical telescopes in the 18th century
List_of_largest_optical_telescopes_in_the_18th_century
Tubeless telescope (17th century)
clear if they actually invented it. Telescopes built in the 17th and early 18th century used single element non-achromatic objective lenses that suffered from
Aerial_telescope
Optical telescope dedicated to observing the Sun
The Dunn Solar Telescope, also known as the Richard B. Dunn Solar Telescope, is a unique vertical-axis solar telescope that specializes in high-resolution
Richard B. Dunn Solar Telescope
Richard_B._Dunn_Solar_Telescope
Compound lens
1817 by Carl Friedrich Gauss as an improvement to the Fraunhofer Achromatic telescope objective lens by adding a meniscus lens to its single convex and
Double-Gauss_lens
English optician (1706–1761)
Willach, R. (31 July 1996). "New light on the invention of the achromatic telescope objective". Notes and Records of the Royal Society of London. 50
John_Dollond
Large telescope with a lens
refractors were large refracting telescopes using achromatic lenses (as opposed to the mirrors of reflecting telescopes). They were often the largest in
Great_refractor
Optical lens used to increase focal length
not aspheric. More common configurations use three or more elements for achromatic correction or apochromatic correction and higher image quality. In its
Barlow_lens
Manufacturer of telescopes, etc., based in Watsonville, California
Schmidt-Newtonian, Advanced Coma-Free, and achromatic refractor telescopes ETX-LS, 150mm (6 in) and 200mm (8 in) F/10 ACF telescope on a single-fork arm with integral
Meade_Instruments
Telescope in California, United States
within convenient reach of the eye end of the telescope. The fabrication of the two-element achromatic objective lens, the largest lens ever made at the
James_Lick_telescope
Type of lens attached to a variety of optical devices such as telescopes and microscopes
type of lens that is attached to a variety of optical devices such as telescopes and microscopes. It is named because it is usually the lens that is closest
Eyepiece
Spectral lines in the Sun's spectrum
of different types of glass, in relation to the improvement of achromatic telescopes), Denkschriften der Königlichen Akademie der Wissenschaften zu München
Fraunhofer_lines
Science museum in Moscow, Russia
communications, and space exploration. Highlights include the first achromatic telescope; an early solar microscope by German anatomists Johann Nathanael
Polytechnic_Museum
Type of optical lens
aplanatic condenser is corrected for spherical aberration. The compound achromatic condenser is corrected for both spherical and chromatic aberrations. The
Condenser_(optics)
Royal Navy officer, navigator and colonial administrator
his passage to and from Britain and in Newfoundland (borrowing an achromatic telescope from the Board of Longitude to ascertain Newfoundland's longitude)
John Campbell (Royal Navy officer)
John_Campbell_(Royal_Navy_officer)
Observatory in Bristol, England
converted the building into an observatory incorporating reflecting and achromatic telescopes and a camera obscura, charging one shilling for visitors or an annual
Clifton_Observatory
German entomologist
Peltzer, who was a mathematician and owned a 60-power Tiedemann achromatic telescope. Soon Meigen was teaching astronomy as well. In 1801, Meigen met
Johann_Wilhelm_Meigen
Official website Unitron History Project Unitron Model 114 - 2.4" Achromatic Telescope 40°48′32″N 73°16′30″W / 40.809°N 73.275°W / 40.809; -73.275 v
Unitron
Astronomical observatory and historic landmark in Arizona, US
Astrophotography classes and Telescopes 101 classes take place. 5.5-inch TEC apochromatic refractor 8-inch Moonraker 'Victorian' achromatic refractor 32-inch Starstructure
Lowell_Observatory
Astronomical observatory in Southern California
use of better, faster films and an upgraded telescope. The Oschin Schmidt was upgraded with an achromatic corrector and provisions for autoguiding. Images
Palomar_Observatory
First successful mirror telescope
the largest achromatic lens objective was not more than about 5 inches (13 cm). There has been some lack of clarity over the early telescopes that Newton
Newton's_reflector
and upgraded even into the 21st century. Refracting telescopes, with lenses, especially achromatic doublets, rather than mirrors were popular in the 19th
List of largest optical telescopes in the 19th century
List_of_largest_optical_telescopes_in_the_19th_century
Astronomical observatory in Wisconsin, USA
light-gathering ability. Both telescopes had achromatic doublets by Alvan Clark. The 19th century saw a transition in large telescope construction from refractor
Yerkes_Observatory
Type of lens
The Gauss lens is a compound achromatic lens that uses two uncemented elements; in its most basic form, a positive meniscus lens on the object side and
Gauss_lens
produced or distributed by Explore Scientific include: Telescopes: Apochromatic and Achromatic Refractors, Dobsonians, and Maksutov-Newtonian Eyepieces
Explore_Scientific
Array used for astronomical observations
interferometer or telescope array is a set of separate telescopes, mirror segments, or radio telescope antennas that work together as a single telescope to provide
Astronomical_interferometer
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 both
Binoculars
Deviation from perfect paraxial optical behavior
and by Dollond in 1757, who constructed the celebrated achromatic telescopes. (See telescope.) Glass with weaker dispersive power (greater v {\displaystyle
Optical_aberration
astronomy and astrophysics, and for making excellent optical glass and achromatic telescope lenses. Gottlob Frege: He is generally considered to be the father
List of German inventors and discoverers
List_of_German_inventors_and_discoverers
How the term nonmetal is used in many disciplines
of different types of glass, in relation to the improvement of achromatic telescopes), Denkschriften der Königlichen Akademie der Wissenschaften zu München
Nonmetallic_material
Italian astronomer (1792–1866)
In 1848 he became director of the Campidoglio observatory. A Merz achromatic telescope (11.4–cm [9”] aperture, 190–cm focal length) was donated to the observatory
Ignazio_Calandrelli
Compound lens consisting of three single lenses
curvature. Jewellers' loupes typically use a triplet lens. Doublet (lens) Achromatic lens Apochromatic lens The five Seidel aberrations Mangin mirror "Triplets"
Triplet_lens
Genevan astronomer (1740–1790)
furnish the observatory, Mallet purchased and installed a 10-foot achromatic telescope, likely manufactured by the English optician John Dollond, a high-precision
Jacques-André_Mallet
Lens or mirror in optical instruments
correction is an achromatic lens, which uses a combination of crown glass and flint glass to bring two colors into focus. Achromatic objectives are a
Objective_(optics)
Mechanism in a telescope's mount
an achromatic lens and Fraunhofer's "German equatorial mount", making it the prototype of all future large refracting telescopes. Early telescope clock
Clock_drive
Bavarian optician (1793–1867)
Observatory An equatorial mounted achromatic refractor from his firm was used in discovery of Neptune. An 1875 Merz Telescope at the Quito Astronomical Observatory
Georg_Merz
Telescope built in 1791
successful, its design was influential. It was one of the larger achromatic doublet telescopes at the time, and one of the largest to have an equatorial mount
Shuckburgh_telescope
Archaic unit of length, about 27 mm
aperture of its day for an achromatic lens. The term for telescopes persisted even in the 20th century, with a telescope listed in the 1909 Sears Roebuck
Paris_inch
Double telescope in Meudon, France
exoplanet discovery was confirmed. The telescope had a good reputation among astronomers for an achromatic telescope in the early 20th century. Dr. Jules
Meudon_Great_Refractor
(TAL-150K, TAL-200K, TAL-250K); Achromatic refracting telescopes with apertures 75, 100 and 125 mm, apochromatic refracting telescopes on plain glasses 125 and
Novosibirsk Instrument-Building Plant
Novosibirsk_Instrument-Building_Plant
Scottish-American astronomer (1837–1903)
accomplishments are related to the construction of telescopes, his theory of the focal curve of achromatic telescopes, and his invention of the spherometer caliper
William_Harkness
Type of photographic or other lens
Astronomers face similar problems, particularly with telescopes that use lenses rather than mirrors. Achromatic lenses are corrected to bring two wavelengths
Apochromat
Optical lens that transmits images
can be repeated. In practice, the lens will be an achromatic doublet. In modern optical telescopes and telescopic sights with a dual-focal plane design
Relay_lens
Swedish mathematician
experiments. Later on he was instrumental in the invention of the Achromatic Telescope. Klingenstierna published in Sweden and in Swedish, and his priority
Samuel_Klingenstierna
Historic 6-inch refracting telescope
The instrument was a 3-inch aperture achromatic refractor with a focal length of 3 1/2-feet (f/14). The telescope utilized a rack and pinion focuser and
Napoleon III Telescope (University of Notre Dame)
Napoleon_III_Telescope_(University_of_Notre_Dame)
1846 discovery of Neptune through mathematically-predicted observation
really exists" (emphasis in original). The discovery telescope was an equatorial mounted achromatic refractor by Joseph Fraunhofer's firm Merz und Mahler
Discovery_of_Neptune
American manufacturer of surveying instruments and telescopes
fabricated and manufactured telescopes in earnest soon after, probably around 1826. In 1830, Holcomb took an achromatic telescope to Professor Benjamin Silliman
Amasa_Holcomb
Telescope at the Royal Observatory, Greenwich, England
otherwise known as a refractor, and was made by the telescope maker Sir Howard Grubb. The achromatic lens was made Grubb from Chance Brothers glass. The
Greenwich_28-inch_refractor
British mathematician and physicist (1819–1903)
reference to the conditions of transparency and the improvement of achromatic telescopes. A still later paper connected with the construction of optical
Sir George Stokes, 1st Baronet
Sir_George_Stokes,_1st_Baronet
1850s telescope near London, England
London, England. It was a great refractor, a large refracting telescope with an achromatic doublet with an aperture of 61 cm (2 feet or 24 inches) and was
Craig_telescope
Astronomical observatory in Estonia
observations. In 1824, a 9" Fraunhofer refractor arrived, the largest achromatic telescope in the world at the time. When von Struve began assembling his Geodetic
Tartu_Observatory
Convex lens used to magnify images
assembling several magnifying lenses in a tube. Hans Lipperhey introduced the telescope in 1608 and Galileo Galilei improved on the device in 1609. Magnifying
Magnifying_glass
Relative abundance of heavy elements in a star or other astronomical object
of different types of glass, in relation to the improvement of achromatic telescopes), Denkschriften der Königlichen Akademie der Wissenschaften zu München
Metallicity
Type of telescope
in two colors (usually blue and yellow). Each telescope may have individually designed non-achromatic objectives to focus the desired wavelength of light
Astrograph
Croat-Italian physicist and writer (1711–1787)
of a comet from three observations, and works on micrometer and achromatic telescopes. In 1782, Bošković was one of the founders of the Accademia nazionale
Roger_Joseph_Boscovich
Lightest color
White is the lightest color and is achromatic (having no chroma). It is the color of objects such as snow, chalk, and milk, and is the opposite of black
White
French scientific instrument and telescope maker
introduction of the achromatic lens by John Dollond, spawned an aperture size race that started in the early 1820s with a telescope made by the German
Robert-Aglaé_Cauchoix
Science Museum in Leiden, Netherlands
projection lantern (1770–1860). Several telescopes: achromatic telescopes (1770 and 1850) and a reflecting telescope (1830). Several electrostatic devices:
Museum_Boerhaave
Optical sighting device for firearms
telescopic sight, used an original design incorporating achromatic lenses such as those used in telescopes, and improved the windage and elevation adjustments
Telescopic_sight
Polish-Lithuanian Jesuit and mathematician
from Jesse Ramsden and John Dollond: a 4-foot transit telescope in 1765, 3.5-foot achromatic telescope in 1770, 8-foot mural quadrant in 1777, and meridian
Marcin_Odlanicki_Poczobutt
Optical aberration
{h}{i}}\mathrm {LSA} \,.} Achromatic lens Hubble Space Telescope Maksutov telescope Parabolic reflector Ritchey–Chrétien telescope Schmidt corrector plate
Spherical_aberration
Austrian optical instrument maker
time was the improvement of the achromatic microscope objective. Today he is best known for the eponymous Plössl telescope eyepiece, which follows his 1860
Simon_Plössl
British physicist
set out to improve the design of the objective lens, improving upon the achromatic lens first designed by Chester Moore Hall and John Dolland in the 18th
Joseph_Jackson_Lister
Manufacturing company
Celestron NexStar 114 telescope Celestron C8 telescope An Omni XLT120 achromatic refractor Celestron NexStar 130SLT Goto telescope Celestron Powerseeker
Celestron
many compound designs of achromatic lenses, designed to reduce color-related distortion (Chromatic aberration): Achromatic doublet (type) Littrow doublet
List_of_lens_designs
British astronomer (1785–1867)
James South made plans for a new, larger telescope, an equatorially mounted achromatic refractor (a telescope with a lens) in a new observatory. He bought
James_South
Irish cleric and astronomer
up an observatory in Cookstown, County Tyrone, which included an achromatic telescope, a transit instrument and clocks for solar and sidereal time. He
James Hamilton (priest, born 1748)
James_Hamilton_(priest,_born_1748)
Astronomical observatory in Palermo, Sicily, Italy
composed of 18th- and 19th-century instruments, among which are achromatic telescopes, a sextant, some barometers and thermometers, as well as two main
Palermo Astronomical Observatory
Palermo_Astronomical_Observatory
instruments. He is particularly credited with the invention of the triple achromatic lens - i.e., apochromatic lens - in 1763, still in wide use today, though
Peter_Dollond
The Galileoscope is a small mass-produced refractor telescope, designed with the intention of increasing public interest in astronomy and science. It
Galileoscope
Halske supplied a total of 36 carbon arc lamps. Schupmann also invented an achromatic lens design using only a single type of glass. The Schupmann dialyte design
Ludwig_Schupmann
Greek research institute
Δωρίδης), who financed its construction. It is a refractor with double achromatic lenses of 40 cm diameter and has 5m focal length. Its tube is mounted
Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing
Institute_for_Astronomy,_Astrophysics,_Space_Applications_and_Remote_Sensing
Irish landowner, politician and astronomer
Markree Observatory. His observatory was home to the largest refracting (telescope with a lens) of the 1830s (an almost 14 inch astronomical grade Cauchoix
Edward_Joshua_Cooper
United States historic place
included a P & J Dollond Achromatic Refracting Telescope, which could identify ships 30 miles (48 km) to sea. That telescope disappeared from the observatory
Portland_Observatory
German-born Austrian technologist and educator
as complete and comprehensible instructions for construction of achromatic telescopes. . Since 1886, the Prechtlgasse in the Alsergrund district of Vienna
Johann_Joseph_von_Prechtl
Magnifying device
incorporating refractive prisms which alter the course of the light through the telescopes, so that the dentist can maintain a neutral, upright position with eyes
Loupe
English astronomer (1809–1857)
three and a half foot refractor. In 1847, he installed a five-foot achromatic telescope by Dollond, mounted equatorially, in a small observatory he built
John_Drew_(astronomer)
Type of camera lens with long focal length
simple lenses usually are constructed using several elements to form an achromatic lens. But such simple lenses are not telephoto lenses, no matter how extreme
Telephoto_lens
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ACHROMATIC TELESCOPE
ACHROMATIC TELESCOPE
Girl/Female
Indian
Flower, Kind of aromatic plant
Girl/Female
Muslim
Aromatic
Girl/Female
Indian
Flower, Kind of aromatic plant
Girl/Female
Arabic, Muslim
Aromatic
Girl/Female
Muslim
Aromatic, A narrator of Hadith
Girl/Female
Muslim
Flower, Kind of aromatic plant
Boy/Male
Indian
Aromatic
Girl/Female
Indian
Aromatic, A narrator of Hadith
Girl/Female
Muslim/Islamic
Aromatic
Girl/Female
Afghan, Arabic, Australian
Aromatic; Sweet Basil
Girl/Female
Arabic, Australian, Muslim
Kind of Aromatic Plant
Boy/Male
Arabic, Muslim
Fragrant; Aromatic
Girl/Female
Muslim/Islamic
Aromatic
Girl/Female
Arabic, Muslim
Aromatic; Sweet Basil
Girl/Female
Arabic, Muslim
Aromatic; Rare Moon
Boy/Male
Muslim
Aromatic
Girl/Female
Arabic, French, Muslim
Aromatic
Boy/Male
Muslim/Islamic
Aromatic
Girl/Female
Muslim
Flower, Kind of aromatic plant
Girl/Female
Arabic, Muslim
Aromatic Sweet Basil
ACHROMATIC TELESCOPE
ACHROMATIC TELESCOPE
ACHROMATIC TELESCOPE
ACHROMATIC TELESCOPE
ACHROMATIC TELESCOPE
ACHROMATIC TELESCOPE
ACHROMATIC TELESCOPE
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