field lens

nounOptics.

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

Origin of field lens

¹

First recorded in 1830–40

Words Nearby field lens

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use field lens in a sentence

The equivalent focal length of a negative or Huygens eyepiece is equal to half the focal length of the larger or field lens.
Pleasures of the telescope | Garrett Serviss
The object looked at requires to be a short distance in front of the field-lens.
The New Gresham Encyclopedia | Various

Browse