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Nom
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Cauchoix (parfois Cochois) Robert-Aglaé
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Date de naissance
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24 April 1776
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Date de mort
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5 February 1845
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Couverture temporelle
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1/2 19th century
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Biographie
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An optician, Cauchoix began in business manufacturing instruments of physics in general c.1800, but rapidly specialised in optical instruments. A fine workman, he was married to the daughter of Gonichon (qv). He cut flint lenses for d’Artigues (1), and used rock crystal to prepare achromatic objectives. A surviving letter to Louis Belmas, bishop of Cambra, 20 November 1811, supplied instructions for the dimensions for three lens of crown and flint glass for Belmas' telescope (2). In 1815 he read a paper to the Académie on 'les moyens de perfectionner les lunettes de spectacle et sur quelques expériences relatives aux aberrations de sphéricité' (3). Only some months earlier he had obtained patents for his development of a telescope with variable enlargement, 'lunettes polyaldes' (4) At the 1819 exhibition he was awarded a silver medal for a range of optical instruments which included opera-glasses, camera lucidas with Amici’s improvements, achromatic instruments, and sphereometers (5). In 1828 he showed lenses of rock crystal to the Académie des Sciences. As highly esteemed as Lerebours, he sold his business to Rossin (qv ) in 1836. He was among the small number of makers who produced Rochon’s prismatic micrometer (6). In the éloge accorded to him in the report on the 1834 exhibition special mention was made of his telescopes that permitted deep penetration into space, three being listed: that prepared for James South's Kensington observatory with a 6 metre focal length; a second delivered to Cambridge University observatory; a third with a focal distance of 7.8m made for M. Cooper (7).
5 Daumas 377.
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Notes biographiques
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1 These were the subject of a report to the Académie des Sciences by Biot 21 January 1811 which was reprinted in Le Moniteur, 38 and 39, 1811.
2. Fleaglass, New York Book Fair 30 April 2023.
3. Cf. Biot 22 January 1816.
4. Brevet d'invention 17 August 1814, addition 6. December 1814. Cf. Turrière 249.
5. Costaz 260-1.
6 Dupin 249-50.
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Bibliographie
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'Note sur les verres de Wollaston’, Le Moniteur cccl 1803.
Instruction sur les lunettes périscopiques, 1813.
Notice sur les lunettes vitro-cristalline inventées en 1828 par Cauchoix
Notice sur les lunettes polyaldes ou à grossissement variable inventées par Cauchoix
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Adresse ; enseigne ; période ; source
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505, rue de la Loi Paris Daumas, p.377; Arch. C.N.A.M.:P-181
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rue des Amandiers Sainte Genevi�ve (workshop) Paris Coll�ge des Grassins Daumas, p. 377, Almanach du Commerce 1813
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Quai Voltaire vis a vis de Pont Royal, entré rue du Bac1 Paris Parfait Indicateur, 1831, Almanach du Commerce
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rue de la Loi, 305, Lepel Paris Almanach du Commerce
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1, rue du Bac Paris Dupin 1836
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17, quai Voltaire Paris Almanach du Commerce, 1819 -
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14, Rue des Amandiers S. Marcel Paris
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Exposition année ; ville ; type ; récompense
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1823 Paris Industrie National Gold medal
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1827 Paris National Gold medal (rappel)
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1834 Paris National Gold medal
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1819 Paris Industrie Nationale Silver medal
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Relation
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Rossin successor
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Identifiant
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62
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ark:/18469/1q174