anastigmaticadj.
Not astigmatic; free from astigmatism: applied to a compound lens so constructed as to correct the astigmatic aberration.
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the world > physical sensation > sight and vision > optical instruments > lens > [adjective] > types of lenses
convex?a1560
planoconvex1665
concavo-convex1677
convexo-concave1693
strong1732
aplanatic1799
periscopic1803
omphaloptic1819
polyzonal1823
shallow1837
first-order1846
periscopical1846
orthoscopic1853
rectilinear1874
overcorrected1875
sphero-cylindrical1881
wide-aperture1882
afocal1887
apochromatic1887
anastigmatic1890
telecentric1892
photovisual1899
aspherical1922
aspheric1923
multifocal1928
plano1944
demagnifying1959
1890 P. Rudolph Brit. Patent 6028/1890 1 It is..necessary to choose the ratios of the single lenses..in such a manner that the opposed astigmatic differences are of the same magnitude, in view of attaining compensation of this astigmatism, or anastigmatic correction of the entire objective.
1893 Year-Bk. Photogr. 10 a (advt.) Zeiss' Patent Anastigmatic Lenses..are the result of calculations with the new Jena Glass.
1897 Outing 30 340/2 The lens must be one of the almost faultless anastigmatic type.
1901 Brit. Jrnl. Photogr. 22 Nov. 744/1 The anastigmatic flatness of field.
1902 Encycl. Brit. XXXI. 696/1 A..new type of anastigmatic objective..was brought out..by Messrs. Dallmeyer, under the name of ‘Stigmatic’.
1953 Electronic Engin. 25 138/1 Anastigmatic lenses are employed in this unit so that a high degree of optical accuracy is obtained.
This entry has not yet been fully updated (first published 1933; most recently modified version published online November 2010).
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adj.1890