Crown glass (optics) - Wikipedia
Crown glass is a type of optical glass with low refractive index and dispersion, used in lenses and prisms. Learn about its history, types, and applications in optics and astronomy.
Crown glass (window) - Wikipedia
Learn about crown glass, an early type of window glass made by blowing and flattening a hollow globe of glass. Find out how crown glass was perfected by French glassmakers in the 1320s and how it was used in medieval Nubia.
Crown glass | Making, Properties & Uses | Britannica
crown glass, handmade glass of soda-lime composition for domestic glazing or optical uses. The technique of crown glass remained standard from the earliest times: a bubble of glass, blown into a pear shape and flattened, was transferred to the glassmaker’s pontil (a solid iron rod), reheated and rotated at speed, until centrifugal force ...
Crown glass - Wikipedia
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.
Crown glass | All About Glass - Corning Museum of Glass
Sheet glass made by blowing a parison, cutting it open, and rotating it rapidly, with repeated reheating, until the centrifugal force has caused it to become a flat disk. After annealing, the disk is cut into panes of the required shape and size.
Crown Glass - an overview | ScienceDirect Topics
Traditional optical glasses are designated as either crown or flint glasses. Crown glasses were originally based on the soda-lime-silica ternary system and were developed for use as window glass. The crown process involved spinning a spherical gob of molten glass to form a flattened disk which was much thicker in the center than at the edges.
Crown glass - (Electromagnetism I) - Vocab, Definition ... - Fiveable
Crown glass is a type of glass known for its optical clarity and low dispersion of light. It is commonly used in the production of lenses, prisms, and optical instruments due to its ability to transmit light effectively while minimizing chromatic aberration.
A New Dawn for Glass Lenses - 20/20 Mag
The name crown glass comes from the crown shape taken by molten glass as it is spun and blown. If a window was to be made, the spinning would continue, expanding and further flattening the crown into a round disk suitable for glazing.
Crown Glasses – refractive index, chromatic dispersion - RP …
Crown glasses are optical glasses with an Abbe number above 55 or above 50 – there is no general agreement on that limit. A high Abbe number indicates weak chromatic dispersion and tentatively a low refractive index, but not always lower than for flint glasses .
Optical Glasses - HyperPhysics
Learn about crown glasses and flint glasses, the most common types of glasses used in optics, based on their dispersions and compositions. Find data for glass numbers, densities, refractive indices and more.
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