Convex+lens
71dou|ble-con|vex lens — «DUHB uhl kon VEHKS, kuhn », a lens with two convex surfaces, used in various magnifying glasses …
72plano-convex — pla•no con•vex [[t]ˌpleɪ noʊ kɒnˈvɛks, kən [/t]] adj. opt pertaining to or noting a lens that is plane on one side and convex on the other • Etymology: 1655–65 …
73achromatic lens — noun A lens generally composed of two separate lenses, one convex and one concave and generally of different materials, in such a way that the chromatic aberration produced by one is corrected by the other …
74biconvex lens — a flat lens that has both surfaces convex …
75BrÑŒcke lens — a combination of a double convex and double concave lens so arranged as to give considerable working distance …
76condensing lens — a large, powerful convex spherical lens to focus available light upon the eye for examination …
77meniscus lens — a crescent shaped lens with one concave surface and one convex; the surfaces have different degrees of curvature. See concavoconvex l. and convexoconcave l …
78planoconvex lens — a lens with one plane and one convex side …
79toric lens — a meniscus lens with a cylindrical curve ground on the outer (convex) surface …
80crystalline lens — /krɪstəlaɪn ˈlɛnz/ (say kristuhluyn lenz) noun a doubly convex, transparent, lens like body in the eye, situated behind the iris and serving to focus the rays of light on the retina …
