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of the invention while prior inventors did not. Several of the opticians were ruined by the expense of the legal proceedings and closed their shops as a result. The patent remained valid until it expired in 1772. Following the expiry of the patent, the price of achromatic doublets in
England
289:
Early in 1757 Dollond succeeded in producing achromatic refraction by the aid of glass and water lenses, and a few months later he made a successful attempt to get the same result by a combination of glasses of different qualities (see
371:
in papers that he published in the
Memoires of the Berlin Academy between 1747 and 1753. John Dollond read the paper and conducted experiments to construct an achromatic lens and was the first person to patent the
387:
Dollond appears to have known of the prior work and refrained from enforcing his patent. After his death, his son, Peter, did take action to enforce the patent. A number of his competitors, including Bass,
771:
384:, made and sold such lenses as early as 1733. In the late 1750s, Bass told Dollond about Hall's design; Dollond saw the potential and was able to reproduce them.
286:(1698–1765), had pointed out that Newton's law of dispersion did not harmonize with certain observed facts, Dollond began experiments to settle the question.
254:, 1758), describing the experiments that led him to the achievement with which his name is specially associated, the discovery of a means of constructing
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He married to
Elizabeth Sommelier in 1729, who had two sons and three daughters. His daughter, Sarah Dollond, married his neighbour and friend,
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in 1758, and three years later elected him one of its fellows. Dollond also published two papers on apparatus for measuring small angles (
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in 1747 had suggested that achromatism might be obtained by the combination of glass and water lenses. Relying on statements made by Sir
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which was granted on 19 April 1758 for a period of 14 years. However, he was not the first to make such lenses. Optician
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241:(1731–1820), who in 1750 had started in business as a maker of optical instruments; this business went on to become
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In 1758 he published an "Account of some experiments concerning the different refrangibility of light" (
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One or more of the preceding sentences incorporates text from a publication now in the
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Scientific
Instruments of the Seventeenth and Eighteenth Centuries and Their Makers
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245:. His reputation grew rapidly, and in 1761 he was appointed optician to the king.
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731:"An account of some experiments concerning the different refrangibility of light"
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and other subjects. In 1752 he abandoned silk-weaving and joined his eldest son,
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10 June] 1706 – 30 November 1761) was an
English
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A theoretical approach to reduce chromatic aberration was worked out by
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483:. Vol. 8 (11th ed.). Cambridge University Press. p. 392.
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634:"New light on the invention of the achromatic telescope objective"
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History of the telescope § Achromatic refracting telescopes
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282:, 1753), but subsequently, after the Swedish physicist,
726:. Vol. VII (9th ed.). 1878. p. 345.
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638:Notes and Records of the Royal Society of London
680:Collecting and Restoring Scientific Instruments
579:Stargazer: the life and times of the telescope
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309:In 1761, Dollond became the optician of King
528:The Biographical Encyclopedia of Astronomers
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278:, Dollond first disputed this possibility (
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317:on 30 November, of that year in London.
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416:List of astronomical instrument makers
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1176:British scientific instrument makers
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498:"Boots Hidden Heroes - John Dollond"
270:(distortion due to colour fringes).
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682:, David and Charles, London 1974,
14:
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1156:18th-century British astronomers
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457:
380:, following the instructions of
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1161:Recipients of the Copley Medal
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615:, Portman Books, London 1989
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339:Achromatic lens § History
1:
536:10.1007/978-0-387-30400-7_369
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49:
1171:Fellows of the Royal Society
632:Willach, R. (31 July 1996).
294:). For this achievement the
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16:English optician (1706–1761)
7:
560:"Jesse Ramsden - Biography"
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266:, reducing or eliminating
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205:Dollond was the son of a
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1151:People from Spitalfields
1098:George Shuckburgh-Evelyn
522:Rudd, M. Eugene (2007).
723:Encyclopædia Britannica
480:Encyclopædia Britannica
440:Encyclopædia Britannica
411:Dollond & Aitchison
243:Dollond & Aitchison
650:10.1098/rsnr.1996.0022
364:
258:by the combination of
67:10 June] 1706
1118:Edward Charles Howard
576:Watson, Fred (2007).
351:Dollond patented the
350:
333:Priority of invention
292:History of telescopes
284:Samuel Klingenstierna
717:"John Dollond"
711:at Wikimedia Commons
268:chromatic aberration
586:. pp. 140–55.
195:achromatic doublets
185:(21 June [
107:Elizabeth Sommelier
611:Daumas, Maurice,
382:Chester Moore Hall
374:achromatic doublet
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353:achromatic doublet
96:Achromatic doublet
63:21 June [
1128:
1127:
1066:Benjamin Thompson
874:William Brownrigg
834:Charles Cavendish
810:Benjamin Franklin
781:Copley Medallists
707:Media related to
678:Ronald Pearsall,
621:978-0-7134-0727-3
593:978-1-74175-383-7
584:Allen & Unwin
545:978-0-387-31022-0
401:dropped by half.
392:, Robert Rew and
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256:achromatic lenses
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145:Scientific career
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264:flint glasses
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978:Samuel Vince
898:Peter Woulfe
850:John Smeaton
842:John Dollond
841:
802:John Pringle
736:Phil. Trans.
735:
721:
709:John Dollond
679:
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505:. Retrieved
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478:
438:
435:John Dollond
430:
398:exploitation
397:
386:
366:
324:
308:
304:Phil. Trans.
303:
300:Copley Medal
288:
280:Phil. Trans.
279:
276:Isaac Newton
251:Phil. Trans.
249:
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215:Spitalfields
204:
178:John Dollond
177:
176:
144:
137:Copley Medal
81:(1761-11-30)
44:Painting by
25:John Dollond
18:
1146:1761 deaths
1141:1706 births
1030:John Hunter
1022:William Roy
866:John Canton
826:John Huxham
794:John Canton
783:(1751–1800)
378:George Bass
361:flint glass
357:crown glass
227:mathematics
213:-weaver at
209:refugee, a
53: 1760
1135:Categories
962:John Mudge
954:James Cook
938:John Walsh
890:John Ellis
422:References
337:See also:
666:144123672
658:0035-9149
201:Biography
163:astronomy
743:, 1759,
502:Boots UK
405:See also
315:apoplexy
207:Huguenot
191:optician
125:Children
741:vol. 50
530:: 303.
507:29 July
468::
437:at the
235:anatomy
231:physics
119:
111:
1120:(1800)
1112:(1799)
1104:(1798)
1092:(1796)
1084:(1795)
1076:(1794)
1068:(1792)
1060:(1791)
1048:(1789)
1040:(1788)
1032:(1787)
1024:(1785)
1016:(1784)
1008:(1783)
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980:(1780)
972:(1778)
964:(1777)
956:(1776)
948:(1775)
940:(1773)
932:(1772)
924:(1771)
916:(1770)
908:(1769)
900:(1768)
892:(1767)
884:(1766)
868:(1764)
860:(1760)
852:(1759)
844:(1758)
836:(1757)
828:(1755)
820:(1754)
812:(1753)
804:(1752)
796:(1751)
745:p. 733
686:
664:
656:
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590:
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341:, and
321:Family
158:Optics
151:Fields
139:(1758)
133:Awards
102:Spouse
662:S2CID
260:crown
223:Greek
219:Latin
113:(
109:
684:ISBN
654:ISSN
617:ISBN
588:ISBN
540:ISBN
509:2023
359:and
262:and
211:silk
187:O.S.
76:Died
65:O.S.
60:Born
646:doi
532:doi
477:".
182:FRS
30:FRS
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115:m.
50:c.
48:,
773:e
766:t
759:v
668:.
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363:.
128:5
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