optical flint — noun optical glass of high dispersion and high refractive index • Syn: ↑flint glass • Hypernyms: ↑optical glass … Useful english dictionary
optical flint glass — noun → flint glass (def. 2) …
flint glass — noun optical glass of high dispersion and high refractive index • Syn: ↑optical flint • Hypernyms: ↑optical glass * * * noun 1. : glass formerly made using calcined flints as a source of silica 2. : heavy brilliant glass that contains lead oxide … Useful english dictionary
optical glass — noun clear homogeneous glass of known refractive index; used to make lenses • Hypernyms: ↑glass • Hyponyms: ↑optical crown, ↑crown glass, ↑optical crown glass, ↑optical flint, ↑flint glass … Useful english dictionary
flint glass — /ˈflɪnt glas/ (say flint glahs) noun 1. any colourless glass other than flat glass. 2. Also, optical flint glass. glass of high dispersion made for optical purposes …
flint — flintas statusas T sritis chemija apibrėžtis Didelio lūžio rodiklio optinis stiklas, turintis PbO. atitikmenys: angl. flint; optical flint; white flint rus. флинт ryšiai: sinonimas – flintstiklis … Chemijos terminų aiškinamasis žodynas
Flint glass — is optical glass that has relatively high refractive index and low Abbe number. Flint glasses are arbitrarily defined as having an Abbe number of 50 to 55 or less. The currently known flint glasses have refractive indices ranging between 1.45 and … Wikipedia
Optical lens design — refers to the calculation of lens construction parameters (variables) that will meet a set of performance requirements and constraints, including cost and schedule limitations. Construction parameters include surface profile types (spherical,… … Wikipedia
Flint glass — (Chem.) A soft, heavy, brilliant glass, consisting essentially of a silicate of lead and potassium. It is used for tableware, and for optical instruments, as prisms, its density giving a high degree of dispersive power; so called, because… … The Collaborative International Dictionary of English
flint glass — flint′ glass n. opt an optical glass of high dispersion and a relatively high index of refraction, composed of alkalis, lead oxide, and silica … From formal English to slang