object glass

Origin of object glass

First recorded in 1655–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for object glass

Historical Examples of object glass

  • The distance between the object-glass and the eye-piece of a telescope.

    The Sailor's Word-Book

    William Henry Smyth

  • It is usually estimated by the clear diameter of the object-glass.

    The Sailor's Word-Book

    William Henry Smyth

  • "This is the object-glass of our telescope," was the answer.

  • In the case of the object-glass of a telescope the image was at what we may call the short focus.

    How it Works

    Archibald Williams

  • The front end of the telescope is open, there being no object-glass.

    How it Works

    Archibald Williams


British Dictionary definitions for object glass

object glass

noun
  1. optics another name for objective (def. 11)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012