object glass

American  

noun

Optics.

1. objective.

---

object glass British  

noun

1. optics another name for objective

---

Etymology

Origin of object glass

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.

From Project Gutenberg

This is conveniently done by cutting a large hole, the size of the brass cell of the object glass, through a sheet of corrugated strawboard, and slipping this on over the cell.

From Project Gutenberg

The object glass only of the telescope was used.

From Project Gutenberg

They make a cross line on my object glass.

From Project Gutenberg

"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."

From Project Gutenberg