optical glass

noun

, Optics.

1. 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

1. See optical crown, optical flint
   any of several types of clear homogeneous glass of known refractive index used in the construction of lenses, etc See optical flint optical crown

Word History and Origins

Origin of optical glass¹

First recorded in 1740–50

Example Sentences

So, Herink and his colleagues built a ring—made of optical glass fibers like the ones that weave together the Internet—and began shooting light from a laser through the ring.

From Popular-Science

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