optical glass classification

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• Glass code — A glass code is a method of classifying glasses for optical use, such as the manufacture of lenses and prisms. There are many different types of glass with different compositions and optical properties, and a glass code is used to distinguish… …   Wikipedia

• Optical mineralogy — A petrographic microscope, which is an optical microscope fitted with cross polarizing lenses, a conoscopic lens, and compensators (plates of anisotropic materials; gypsum plates and quartz wedges are common), for crystallographic analysis.… …   Wikipedia

• Glass transition — The liquid glass transition (or glass transition for short) is the reversible transition in amorphous materials (or in amorphous regions within semicrystalline materials) from a hard and relatively brittle state into a molten or rubber like state …   Wikipedia

• Standard Industrial Classification — Le Standard Industrial Classification (classification normalisée des industries, abrégé en SIC) est un système de classification des industries utilisant quatre chiffres établi par le gouvernement des États Unis dans les années 1930. Il fut… …   Wikipédia en Français

• International Standard Classification of Occupations — The International Standard Classification of Occupations is an International Labour Organization (ILO) classification structure. The current version, known as ISCO 88, is the third iteration, following ISCO 58 and ISCO 66. There is an updated… …   Wikipedia

• Business and Industry Review — ▪ 1999 Introduction Overview        Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …   Universalium

• Corrective lens — A bifocal corrective eyeglass lens A pair of contact le …   Wikipedia

• Laser beam profiler — A laser beam profiler captures, displays, and records the spatial intensity profile of a laser beam at a particular plane transverse to the beam propagation path. Since there are many types of lasers ultraviolet, visible, infrared, continuous… …   Wikipedia

• Moscow Oblast — Московская область (Russian)   Oblast   …   Wikipedia

• Lyman James Briggs — which was named in his honor. He worked as a civil servant for the U.S. Government for 49 years.Personal and academic historyLyman James Briggs was born on a farm in Assyria, Michigan near Battle Creek, Michigan. He was the eldest of two brothers …   Wikipedia

• Perkins Observatory — is an astronomical observatory in Delaware, Ohio. It is owned and operated by Ohio Wesleyan University.Early HistoryThe observatory is named for Hiram Perkins, a professor of mathematics and astronomy at the Ohio Wesleyan University in Delaware,… …   Wikipedia