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optical glass
noun
, Optics.
- any of several types of high-quality, homogeneous, color-free glass, as flint or crown glass, having specified refractive properties, used in lenses and other components of optical systems.
optical glass
noun
- any of several types of clear homogeneous glass of known refractive index used in the construction of lenses, etc See optical flint optical crown
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Word History and Origins
Origin of optical glass1
First recorded in 1740–50
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Example Sentences
In 1914 the imports of optical glass were $641,000 in value.
From Project Gutenberg
The preparation of the best optical glass is now made a great mystery by one or two proficients.
From Project Gutenberg
The windows are made of optical glass similar to that used in the largest telescopes.
From Project Gutenberg
This procedure is being repeated in the launching of an optical-glass industry; this trade has also been in Teutonic hands.
From Project Gutenberg
In April, 1917, the most serious problem in the situation was the manufacture of optical glass.
From Project Gutenberg
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