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John Dollond, English optician

John Dollond, English optician

H404/0291

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Credit

GEORGE BERNARD / SCIENCE PHOTO LIBRARY GEORGE BERNARD / SCIENCE PHOTO LIBRARY

Caption

John Dollond. Portrait of the English optician John Dollond (1706-1761). The son of a French Huguenot refugee, Dollond was for many years a silk-weaver. In 1752, however, he joined his son Peter in his business as an optician. They attacked the problem of chromatic aberration, that is the colour fringes in the images produced by a simple lens, which Newton had considered inherent in lenses. A largely achromatic compound lens had been designed and used in telescopes from 1733. The Dollonds, using improved glass, produced good quality achromatic lenses from 1758, which led to better microscopes being made. Published in 1849.

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