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Chester Moore Hall (9 December 1703, Leigh, Essex, England – 17 March 1771,
Sutton Sutton (''south settlement'' or ''south town'' in Old English) may refer to: Places United Kingdom England In alphabetical order by county: * Sutton, Bedfordshire * Sutton, Berkshire, a location * Sutton-in-the-Isle, Ely, Cambridgeshire * S ...
) was a British lawyer and inventor who produced the first
achromatic lens An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus on the same plane. The most com ...
es in 1729 or 1733 (accounts differ). He used the achromatic lens to build the first achromatic telescope, a refracting telescope free from
chromatic aberration In optics, chromatic aberration (CA), also called chromatic distortion and spherochromatism, is a failure of a lens to focus all colors to the same point. It is caused by dispersion: the refractive index of the lens elements varies with the ...
(colour distortion). He lived at New Hall,
Sutton Sutton (''south settlement'' or ''south town'' in Old English) may refer to: Places United Kingdom England In alphabetical order by county: * Sutton, Bedfordshire * Sutton, Berkshire, a location * Sutton-in-the-Isle, Ely, Cambridgeshire * S ...
. His name was also spelled ''Chester Moor Hall'' and ''Chester More Hall''. The design had two elements, a crown and flint glass, that brought two wavelengths of light to a focus. Chester is noted as having made the first twin color corrected lens in 1730.


See also

*
List of largest optical telescopes in the 18th century List of largest optical telescopes in the 18th century, are listings of what were, for the time period of the 18th century, large optical telescopes. The list includes various refractor and reflector that were active some time between about 1699 t ...
*
John Dollond John Dollond FRS (10 June O.S. (21 June N.S.) 170630 November 1761) was an English optician, known for his successful optics business and his patenting and commercialization of achromatic doublets. Biography Dollond was the son of a Hugu ...
(also developed achromats in the 1750s)


References

1703 births 1771 deaths Members of the Inner Temple 18th-century British astronomers 18th-century British inventors Lens designers {{UK-law-bio-stub