英语词汇“aplanat”的英英意思、用法、释义、翻译、读音、例句、短语、词组、英语词典-本地帮

单词

aplanat

释义

aplanat|ˈæplənæt|
[a. G. aplanat (A. Steinheil, 1866); cf. aplanatic a.]
An aplanatic lens. Also attrib.
1890Anthony's Photogr. Bull. III. 129 After Steinheil invented his applanat [sic], Dallmeyer copied the same and called it Rapid Rectilinear.1895J. A. Hodges Photographic Lenses viii. 44 Prior to 1866, when Steinheil introduced his rapid aplanat working at f/7, all doublet lenses required comparatively small apertures in order to obtain sufficient definition and flatness of field.1901Brit. Jrnl. Photogr. 1 Nov. 695/1 These aplanats consist of strong refracting flint glasses, whose quotient and colour diversion do not much differ.1951Engineering 9 Mar. 297/2 The two-mirror aplanat telescopes.

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