object glass

American  

noun

Optics.

1. objective.

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object glass British  

noun

1. optics another name for objective

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Etymology

Origin of object glass

First recorded in 1655–65

Example Sentences

See Examples For:

object glass

See Prism, Ð Achromatic telescope, or microscope, one in which the chromatic aberration is corrected, usually by means of a compound or achromatic object glass, and which gives images free from extraneous color.

From Webster's Unabridged Dictionary by Webster, Noah

I was surprised to find the object glass affected by so serious a defect that it could not be expected to do any work of the first class.

From The Reminiscences of an Astronomer by Newcomb, Simon

The refractor achieves this by means of a carefully shaped lens, called the object glass, or objective.

From Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers by Serviss, Garrett Putman

In precisely a similar manner an image is formed at the focus of the object glass of a refracting telescope.

From Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers by Serviss, Garrett Putman

Any errors left over are to be attributed to other causes than the want of collinearity of the axes of object glass and eyepiece.

From On Laboratory Arts by Threlfall, Richard