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John Dollond FRS (21 June [O.S. 10 June] 1706 – 30 November 1761) was an English optician, known for his successful optics business and his patenting and commercialization of achromatic doublets.
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- 21 June [O.S. 10 June] 1706, London, England
- Copley Medal (1758)
- Achromatic doublet
John Dollond (born June 10, 1707, London, Eng.—died Nov. 29/30, 1761, London) was a British maker of optical and astronomical instruments who developed an achromatic (non-colour-distorting) refracting telescope and a practical heliometer, a telescope that used a divided lens to measure the Sun’s diameter and the angles between celestial bodies.
- The Editors of Encyclopaedia Britannica
May 21, 2018 · Dollond, John. ( b. London, England, 10 June 1706; d. London, 30 November 1761) optics. Dollond was born in Spitalfields, London, of French Protestant parents who had originally lived in Normandy. Although he became a silk weaver, his inclination led him to the study of mathematics, astronomy, and the classical languages in whatever spare time ...
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Jun 10, 2021 · John Dollond – Improving the Telescope with Achromatic Lenses. physics 10. June 2021 0 Tabea Tietz. On June 10, 1706 (10 June O.S. / 21 June N.S.), English optician John Dollond was born. He is known for his successful optics business and his patenting and commercialization of achromatic lenses.
Nov 30, 2022 · November 30, 2022. A small Dollond achromatic telescope, for terrestrial use, 1760-65, Science Museum, London (sciencemuseumgroup.org.uk) John Dollond, an English instrument maker, died Nov. 30, 1761, at age 55. In 1758, Dollond announced his invention of a true "achromatic" telescope.
John Dollond. 1706-1761. English optician famous for inventing achromatic lenses. Objects viewed through lenses are fringed by interfering colors. This chromatic aberration is caused by lenses differently refracting the various wavelengths composing white light. The stronger the lens the more chromatically disturbed the image.
John Dollond 1706–1761 John Dollond was a British telescope maker who patented the discovery of the achromatic lens in the middle eighteenth century. The story of this lens is filled with controversy because it is widely believed that Dollond was not the inventor of the achromatic lens, but learned about its properties from lens maker George ...
