object glass

noun

Optics.

1. objective.

object glass

noun

1. optics another name for objective

Word History and Origins

Origin of object glass¹

First recorded in 1655–65

Example Sentences

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.

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What the diameter of the object glass was we do not know, perhaps two inches or possibly a little more.

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The object glass only of the telescope was used.

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They make a cross line on my object glass.

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"Except that I have replaced the object glass with the lens I picked up the other day at Thaneford's crow's-nest on Sugar Loaf."

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