optical glass

American  

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.

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optical glass British  

noun

1. 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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Etymology

Origin of optical glass

First recorded in 1740–50

Example Sentences

This method also does away with the expensive optical glass cover.

From New York Times • Oct. 12, 2022

In his book, he recalls doing nearly 30 jobs, including underwater filmmaker, optical glass fitter, bar owner, and in-country mechanic for the Royal New Zealand Air Force.

From Los Angeles Times • May 7, 2017

Kao figured out how to transmit light over long distances in optical glass fibers.

From Scientific American • Jan. 5, 2011

For the bar, designer Tokujin Yoshioka made a table and bench out of slabs of optical glass.

From Architectural Digest • Apr. 1, 2010

The annealing process is therefore carried out in a manner differing essentially from that in use for any other variety of flat glass and nearly resembling that used for optical glass.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" by Various