- optical crown glass
- nounoptical glass of low dispersion and low refractive index• Syn: ↑optical crown, ↑crown glass• Hypernyms: ↑optical glass
Useful english dictionary. 2012.
optical crown glass
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crown glass — noun 1. a glass blown into a globe which is later flattened and spun to form a disk • Hypernyms: ↑glass 2. optical glass of low dispersion and low refractive index • Syn: ↑optical crown, ↑optical crown glass • Hypernyms: ↑optical glass … Useful english dictionary
optical crown — noun optical glass of low dispersion and low refractive index • Syn: ↑crown glass, ↑optical crown glass • Hypernyms: ↑optical glass … Useful english dictionary
Crown glass — Glass Glass (gl[.a]s), n. [OE. glas, gles, AS. gl[ae]s; akin to D., G., Dan., & Sw. glas, Icel. glas, gler, Dan. glar; cf. AS. gl[ae]r amber, L. glaesum. Cf. {Glare}, n., {Glaze}, v. t.] [1913 Webster] 1. A hard, brittle, translucent, and… … The Collaborative International Dictionary of English
Crown glass — is either of two kinds of glass: Crown glass (window) was a type of hand blown window glass. Crown glass (optics) is a type of optical glass used in lenses. This disambiguation page lists articles associated with the same title. If an … Wikipedia
crown glass — crown′ glass n. 1) opt cer an optical glass of low dispersion and generally low index of refraction 2) cer an old form of window glass formed by blowing a globe and whirling it into a disk • Etymology: 1700–10 … From formal English to slang
crown glass — n. 1. window glass made in flat, circular plates by blowing and whirling, with a small knot in the center left by the blower s rod 2. a very clear optical glass with a low index of refraction … English World dictionary
Crown glass (optics) — This article is about crown glass as used in optics. For the window glass, see Crown glass (window). Crown glass is type of optical glass used in lenses and other optical components. It has relatively low refractive index (≈1.52) and low… … Wikipedia
crown glass — 1. an optical glass of low dispersion and generally low index of refraction. 2. an old form of window glass formed by blowing a globe and whirling it into a disk. [1700 10] * * * handmade glass of soda lime composition for domestic glazing… … Universalium
Crown glass (window) — This article is about the window glass. For the optical glass, see Crown glass (optics). Crown Glass Crown glass was an early type of window glass. In this process, glass was blown into a crown or hollow globe. This was then transferred from the… … Wikipedia
crown glass — noun Date: 1706 1. a glass blown and whirled into the form of a disk with a center lump left by the worker s rod 2. alkali lime silicate optical glass having relatively low refractive index and low dispersion value … New Collegiate Dictionary
