Dollond, John

Dollond, John

▪ British optician
born June 10, 1706, London, Eng.
died Nov. 30, 1761, London

      British maker of optical (optics) and astronomical instruments who developed an achromatic (non-colour-distorting) refracting telescope and a practical heliometer, a telescope used to measure the Sun's diameter and the angles between celestial bodies.

      The son of Huguenot refugees, Dollond learned the family trade of silk weaving. He became proficient in optics and astronomy and, in 1752, joined his eldest son, Peter, in an optical business. Two years later he introduced his heliometer.

      In 1747 a controversy arose over Newton's statement that chromatic aberration in lenses could not be corrected. After later experiments proved otherwise, Dollond devised an achromatic lens made of flint and crown glasses for use in telescopes. The invention earned him the Copley Medal of the Royal Society, but the prior discovery by Chester Moor Hall of England was later recognized.

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Universalium. 2010.

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  • Dollond , John — (1706–1761) British optician Dollond was born in London, the son of Huguenot refugees. He started life as a silk weaver but later joined his eldest son, Peter, in making optical instruments, and devoted years of experiment to developing an… …   Scientists

  • Dollond, John and George — born June 10, 1706, London, Eng. died Nov. 30, 1761, London born Jan. 25, 1774, London died May 13, 1852, London British optical scientists. John developed an achromatic (non colour distorting) refracting telescope and a practical heliometer (a… …   Universalium

  • Dollond, John y George — (10 jun. 1706, Londres, Inglaterra–30 nov. 1761, Londres) (25 ene. 1774, Londres–13 may. 1852, Londres). Científicos ópticos británicos. John desarrolló un telescopio refractor acromático (que no distorsiona el color) y un heliómetro práctico (un …   Enciclopedia Universal

  • DOLLOND, JOHN —    a mathematical instrument maker, born in Spitalfields, London, of Dutch descent; began life as a silk weaver; made good use of his leisure hours in studies bearing mainly on physics; went into partnership with his son, who was an optician;… …   The Nuttall Encyclopaedia

  • Dollond, John — (10.6.1706 30.11.1761) Englischer Optiker, von Beruf eigentlich Seidenweber, arbeitete er bei seinem Sohn Peter (1730 1820), der einen optischen Betrieb gegründet hatte. Dort entdeckte er die unterschiedlichen Brechungsindizes von Flint und… …   Das Lexikon aus „Bernie's Foto-Programm"

  • Dollond — John …   Scientists

  • John Dollond — Born 21 June 1706(1706 06 21) …   Wikipedia

  • John Dollond — (* 10. Juni 1706 in Spitalfields, London; † 30. November 1761 in London) war ein britischer Optiker und Teleskopbauer von französischer Herkunft. Leben Er stammte aus einer …   Deutsch Wikipedia

  • John Dollond — John Dollond. Nacimiento 10 de junio de 1706 Londres Fallecimiento 30 de noviembre de 1761 …   Wikipedia Español

  • Dollond — Dollond, John, Optiker, geb. 10. Juni 1706 in Spitalfields, gest. 30. Nov. 1761 m London, war bis 1752 Seidenweber, beschäftigte sich aber nebenbei mit Mathematik, Optik und Astronomie. Er verband sich mit seinem ältesten Sohn, Peter (geb. 24.… …   Meyers Großes Konversations-Lexikon

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