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field lens

American  

noun

Optics.

  1. the lens in an eyepiece that is farthest from the eye and that deviates rays toward the center of the eye lens.

Etymology

Origin of field lens

First recorded in 1830–40

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.