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THE production of optical glass is one of the most difficult as well as one of the most interesting of manufacturing processes.

Fraunhofer was the first to realize the necessity for improvement in the manufacture of glass in order to bring it to the necessary degree of homogeneity and to make it free from internal strain, essential requirements for optical glass. It may be said that it has taken more than a hundred and fifty years to bring the art of optical glass manufacture to its present state.

op′tical glass′

Chance Bros, have been engaged on the task for nearly a hundred and twenty years and the Chance-Parsons optical glass embodies their experience, together with the newer research work in their laboratories as well as that of the firm owned by the late Sir Charles Parsons, under whom notable advances were made.

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Optical Glasses

Advanced search. Skip to main content. Abstract THE production of optical glass is one of the most difficult as well as one of the most interesting of manufacturing processes. Authors Search for H. Rights and permissions Reprints and Permissions.


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Comments By submitting a comment you agree to abide by our Terms and Community Guidelines. But when you look closer at it, the window glass contains many impurities.


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  • Optic glasses are required to travel light even with its thickness of meters. Ordinary glasses with that thickness cannot transmit light because of their contained impurities. A thickness of meters?

    CrystalView Optical Glass

    Not cm, but meters? How do you make high-purity glass, then? Glass is made of silica sand, quartzite, and other stones or sands from mine.

    Jon Kuhn Glass

    Those stones or sands already look like glasses when mined. Glass is made from a mixture of sands and other materials.


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    Glass is made of sands! Sounds interesting. Each sand has a difference in the proportion of impurities. The higher the purity of the sand, the higher the purity of the glass.