A concave lens, speculum, etc. Obsolete.
| 单词 | θ64931 |
| 释义 | the world > physical sensation > sight and vision > optical instruments > lens > [noun] > other lenses (27) concave1632 A concave lens, speculum, etc. Obsolete. globe1653 A glass vessel of approximately spherical shape; esp. (a) a lampshade; (b) a vessel filled with water, used for displaying ornamental fish, a model… meniscus1693 Optics. A lens that is convex on one side and concave on the other; spec. a convexo-concave lens, which is crescent-shaped in cross-section, with… hemispherule1696 A half spherule; a small hemispherical lens. convex1705 A convex glass or lens. omphaloptic1728 = omphalopter, n. rare. omphalopter1738 A biconvex lens. crown lens1764 a lens made of crown glass, typically used as a component of an achromatic lens. achromatic1785 Optics. An achromatic lens. condenser1798 Optics. A lens or system of lenses by which light is concentrated on one point or object. meniscus lens1820 = sense 2. Fresnel lens1835 Used attributively and in the possessive to designate apparatus, phenomena, and concepts relating to his work in optics, as Fresnel biprism = biprism… bull's-eye1839 A lens, hemispherical or plano-convex. Stanhope lens1850 a lens of small diameter with two convex faces of different radii, enclosed in a metallic tube (Knight). Invented by Charles 3rd Earl Stanhope… spot lens1860 (a) Microscopy a condensing lens having a black spot painted in the centre or an opaque disc mounted below to intercept direct light, used for… amplifier1866 A lens which enlarges the field of vision. achromat1873 An achromatic lens. Also achromat lens. projectora1884 An apparatus containing a source of light and a system of lenses for projecting on to a screen an enlargement of an image on a slide, film, or… aplanat1890 A symmetrical doublet composed of achromatized lenses; an aplanatic lens. Also attributive. triplet condenser1892 attributive and in other combinations, as triplet condenser, triplet head, triplet rhyme, etc. Aldis lens1902 a kind of anastigmatic compound lens that is a doublet consisting of a front lens which is convex on one side and concave on the other and a back… monocentric1922 Optics. A monocentric lens. Schmidt correcting plate1934 attributive. Designating an aspheric lens formed so as to counter the spherical aberrations in a spherical mirror it is placed in front of, as Schmidt… coated lens1948 Covered with a coat or coating of some substance, as paint, tinfoil, etc. Also coated lens n. (see quot. 1948). coated paper n. (see quots.). Panavision1955 A proprietary name for: a type of anamorphic lens producing a widescreen image. More generally: widescreen cinematography. Frequently attributive… Schmidt correcting lens1961 attributive. Designating an aspheric lens formed so as to counter the spherical aberrations in a spherical mirror it is placed in front of, as Schmidt… re-imaging1962 Optics. attributive. Designating a lens or other optical system which inverts, magnifies, or otherwise manipulates the initial image formed by a… |
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