Webˈflint 1 : a massive hard dark quartz that produces a spark when struck by steel 2 : an implement of flint used in prehistoric cultures 3 a : a piece of flint b : a material used for … Flint glass is optical glass that has relatively high refractive index and low Abbe number (high dispersion). 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 2.00. A concave lens of flint glass is commonly combined with a convex lens of crown glass to produce an achromatic doublet le…
Achromatic doublet design and optimization OFH
WebFlint glassis 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 … WebFlint is one of several sedimentary types of quartz, and a mineral that is typically categorized as chert – the rock used to create chalk and limestone. Flint usually appears in nuggets, which are graphite grey or darker; … daniel williford arrested
Understanding Glass - Types, Properties and Fabrication
WebApr 7, 2024 · Flint definition: Flint is a very hard greyish-black stone that was used in former times for making tools. Meaning, pronunciation, translations and examples WebFrom the laboratory standpoint, there are three main types of glass used today: borosilicate, quartz, and soda lime or flint glass. Borosilicate glass is made to withstand thermal shock better than most other glass through a combination of reduced expansion coefficient and greater strength, though fused quartz outperforms it in both respects. Webˈflint 1 : a massive hard dark quartz that produces a spark when struck by steel 2 : an implement of flint used in prehistoric cultures 3 a : a piece of flint b : a material used for producing a spark especially : an alloy (as of iron and cerium) used in lighters 4 : something resembling flint in hardness flintlike ˈflint-ˌlīk adjective daniel williamson aprn