| 单词 | crown lens |
| 释义 | > as lemmascrown lens crown lens n. a lens made of crown glass, typically used as a component of an achromatic lens. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > lens > [noun] > other lenses concave1632 globe1653 meniscus1693 hemispherule1696 convex1705 omphaloptic1728 omphalopter1738 crown lens1764 achromatic1785 condenser1798 meniscus lens1820 Fresnel lens1835 bull's-eye1839 Stanhope lens1850 spot lens1860 amplifier1866 achromat1873 projectora1884 aplanat1890 triplet condenser1892 Aldis lens1902 monocentric1922 Schmidt correcting plate1934 coated lens1948 Panavision1955 Schmidt correcting lens1961 re-imaging1962 1764 B. Martin New & Comprehensive Syst. Math. Inst. II. 145 The Radius of a Plano-convex Crown-lens that combined with the other, shall prevent any Error from the spherical Figure. 1979 J. Muirden Sidgwick's Amateur Astronomer's Handbk. (ed. 4) iv. 64 A flint lens is capable of neutralising to a large extent the colour dispersion of a crown lens (its aberration being the opposite sign). 2007 P. S. Harrington Star Ware (ed. 4) iii. 28 Achromatic objective lenses, in which a convex crown lens is paired with a concave flint element, go a long way in suppressing chromatic aberration. < as lemmas |
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