Chester Moore Hall (9 December 1703,

Leigh, Essex Leigh-on-Sea (), commonly referred to simply as Leigh, is a town and civil parish in the City of Southend-on-Sea, in the ceremonial county of Essex, England. In 2011, it had a population of 22,509. Geography Leigh-on-Sea is on the northern ...

, 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 * ...

) 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 comm ...

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 w ...

(colour distortion). He lived at New Hall,

. 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.

References

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

See also

References