| 释义 |
apochromatic, a. (n.)|ˌæpəʊkrəʊˈmætɪk|
[f. Gr. ἀπό from, after achromatic a.]
Epithet of an improved form of achromatic lens invented by Abbe. Also as n., an apochromatic lens; in Photogr. further shortened to ˈapochroˌmat. So apoˈchromatism, apochromatic condition or quality.
1887Jrnl. R. Microsc. Soc. 2nd Ser. VII. 23 In the new objectives..the elimination of these errors realizes an achromatism of higher order than has hitherto been attained. The objectives of this system may be therefore distinguished from achromatic lenses in the old sense of the word by the term apochromatism, and may be called apochromatic objectives. 1890Anthony's Photogr. Bull. III. 318 The apochromatic objectives give absolutely the same photographic image as that seen upon the screen. Ibid. 319 In 1884, before the apochromatics were brought out. 1901Photogr. Jrnl. 31 July 324 Remarkably perfect microscope objectives—the Abbe apochromats. 1939W. Clark Photogr. by Infrared xvi. 342 The ‘apochromatic’ lenses... Apochromats of low aperture are..sometimes used for photoengraving and colour photographic cameras. |