ach·ro·mat·ic /ˌækrəˈmætɪk, (ˌ)e-/
ach·ro·mat·ic /ˌækrəˈmætɪk/ 形容詞
1. Opt. Free from color; transmitting light without decomposing it into its primary colors.
2. Biol. Uncolored; not absorbing color from a fluid; -- said of tissue.
Achromatic lens Opt., a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed.
Achromatic prism. See Prism.
Achromatic telescope, or microscope, one in which the chromatic aberration is corrected, usually by means of a compound or achromatic object glass, and which gives images free from extraneous color.
adj 1: being of the achromatic color of maximum lightness; having
little or no hue owing to reflection of almost all
incident light; "as white as fresh snow"; "a bride's
white dress" [syn: white] [ant: black]
2: being of the achromatic color of maximum darkness; having
little or no hue owing to absorption of almost all
incident light; "black leather jackets"; "as black as
coal"; "rich black soil" [syn: black] [ant: white]
3: having no hue [ant: chromatic]