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

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Example Sentences

See Examples For:

object glass

Pulkova Observatory, object glass made by Alvan Clark & Sons, 144,   145; foundation and situation, 309-313.

From The Reminiscences of an Astronomer by Simon Newcomb

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 Richard Threlfall

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 Simon Newcomb

Suppose we turn it in such a way that the eyepiece moves slightly outside the focus, or away from the object glass.

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 Garrett Putman Serviss

They make a cross line on my object glass.

From The Girl Scouts at Rocky Ledge Nora's Real Vacation by Lilian Garis

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