eyepiece
eyepiece eye"piece` eye-piece eye"-piece`, n. (Opt.) The lens, or combination of lenses, at the eye end of a microscope, telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed.

Syn: ocular. [1913 Webster]

{Collimating eyepiece}. See under {Collimate}.

{Negative}, or {Huyghenian}, {eyepiece}, an eyepiece consisting of two plano-convex lenses with their curved surfaces turned toward the object glass, and separated from each other by about half the sum of their focal distances, the image viewed by the eye being formed between the two lenses. it was devised by Huyghens, who applied it to the telescope. Campani applied it to the microscope, whence it is sometimes called {Campani's eyepiece}.

{Positive eyepiece}, an eyepiece consisting of two plano-convex lenses placed with their curved surfaces toward each other, and separated by a distance somewhat less than the focal distance of the one nearest eye, the image of the object viewed being beyond both lenses; -- called also, from the name of the inventor, {Ramsden's eyepiece}.

{terrestrial}, or {Erecting eyepiece}, an eyepiece used in telescopes for viewing terrestrial objects, consisting of three, or usually four, lenses, so arranged as to present the image of the object viewed in an erect position. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • eyepiece — eye piece eye piece eye piece , n. (Opt.) The lens, or combination of lenses, at the eye end of a microscope, telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed. Syn: ocular. [1913… …   The Collaborative International Dictionary of English

  • eyepiece — ► NOUN ▪ the lens that is closest to the eye in a microscope or other optical instrument …   English terms dictionary

  • eyepiece — [ī′pēs΄] n. in a telescope, microscope, or other optical instrument, the lens or lenses nearest the viewer s eye: see MICROSCOPE …   English World dictionary

  • Eyepiece — For the device for looking through a camera, see viewfinder. A collection of different types of eyepieces. An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. It is… …   Wikipedia

  • eyepiece — UK [ˈaɪˌpiːs] / US [ˈaɪˌpɪs] noun [countable] Word forms eyepiece : singular eyepiece plural eyepieces the glass part that you put your eye against in a microscope or telescope …   English dictionary

  • eyepiece — [[t]a͟ɪpiːs[/t]] eyepieces N COUNT The eyepiece of a microscope or telescope is the piece of glass at one end, where you put your eye in order to look through the instrument …   English dictionary

  • eyepiece — okuliaras statusas T sritis fizika atitikmenys: angl. eyepiece; ocular vok. Okular, n rus. окуляр, m pranc. oculaire, m …   Fizikos terminų žodynas

  • eyepiece — noun Date: 1790 the lens or combination of lenses at the eye end of an optical instrument …   New Collegiate Dictionary

  • eyepiece — /uy pees /, n. the lens or combination of lenses in an optical instrument through which the eye views the image formed by the objective lens or lenses; ocular. See diag. under microscope. [1780 90; EYE + PIECE] * * * …   Universalium

  • eyepiece — noun The lens (or combination of lenses) at the eye end of a microscope or telescope by which the image is viewed …   Wiktionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”