Optical Glass


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optical glass

[′äp·tə·kəl ′glas]
(materials)
A type of glass which is free from imperfections, such as unmelted particles, bubbles, and chemical inhomogeneities, which would affect its transmission of light.

Optical Glass

 

a highly transparent, homogeneous, and chemically resistant glass. Optical glass is manufactured with precisely defined optical properties—an index of refraction rang-

ing from 1.47 to 2.04 and dispersion value ranging from 70 to 78. Depending on the combination of these properties, optical glasses are subdivided into crown glass (low refraction and high dispersion) and flint glass (with the opposite properties). Optical glass is used to manufacture optical instruments and devices, such as eyeglasses, objectives, microscopes, binoculars, and photometers.

References in periodicals archive ?
Incapable of creating an infelicitous design, Orlina, always sensitive to light, has decided to float these vaporous exhalations of color to actively accentuate and contrast and complement the equilibrium of light emanating from optical glass.
It was found in the research that during processing the optical glass elements by electron beam their surface layers change their structure, which become close to the quartz.
In 1912, a report had been circulated to government officials warning that war with Germany would result in serious shortages of optical glass, which was vital for many instruments used by the armed services.
He explains that flat glass is used in mirrors, windows, TV tubes and some kinds of furniture, while optical glass is used in eyeglasses, microscopes, medicines, chemicals and cosmetics, besides glass jars and bottles.
Geniomer is predicted to have a use in automotive technology, as flexible optical glass for optical waveguides.
CDGM is China's largest optical glass manufacturer producing preforms for optical companies to convert into optical lens.
Its first use was for grinding spheres and aspheres in BK7 optical glass.
Since its establishment in 1941 as Japan's first specialty manufacturer of optical glass, Hoya (TSE: 7741) has diversified into new business areas harnessing the potential of advanced optics technologies.
Hoya lost 150 yen to 3,830 yen, a day after the optical glass maker said its board has approved launching a friendly takeover bid for Pentax Corp.
A manufacturer of specialist optical glass is continuing its growth after striking a deal with a Chinese manufacture that will allow it to expand with greater volumes into Europe.
Applications include sophisticated labels used to create brand awareness; adhesive backing for commercial signage; permanent or semipermanent labels attached to parts and components; tapes used to mask optical glass, medical devices, and electrical circuits; and release liners for medical tapes and bandages.