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 ?
Features I find worthwhile are HD or ED optical glass, adjustable eyecups, long eye relief (since I wear eyeglasses), close focusing (for looking at birds and insects), reasonably rugged construction and water resistance.
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.
By theway, 10 of those affected at Pilkington's found alternative employment independently, while the remaining 10 were subsequently employed by Phoenix Optical Glass in St Asaph who purchased the special glass disc part of the companywith financial assistance from the Assembly Government.
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.
The Tender Offeror started as an optical glass manufacturer.
Its first use was for grinding spheres and aspheres in BK7 optical glass.
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.
The significance of this new process is that manufacturers of optical systems can now create sealed packages using the highest quality optical glass.
The FL stands for fluoride, an element contained in the optical glass, which eliminates color fringes for more accurate color reproduction.