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

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

In focusing, do not allow the object glass of the microscope to come in contact with the cover glass.

From Human Foods and Their Nutritive Value by Snyder, Harry

Such an instrument is known as a compound or astronomical telescope, and the first lens is called the object glass and the second lens the magnifying glass, or eye-piece.

From Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 by Martin, Marcus J.

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