Word:

eyepiece

eye´piece`
n.1.(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.
Collimating eyepiece
See under Collimate.
Negative
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
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.
Noun1.eyepieceeyepiece - combination of lenses at the viewing end of optical instruments
Synonyms: ocular
binocular, binoculars, field glasses, graticule, lens, lens system, lense, light microscope, ocular, opera glasses, optical telescope, reticle, reticule, sight
Translate eyepiece to German, Translate eyepiece to French
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Eyehole
Eyeish
Eyelash
Eyelashes
Eyeless
eyelessness
Eyelet
Eyelet hole
Eyelet punch
Eyelet ring
Eyeleteer
Eyelid
eyelike
eyeliner
Eyen
eyepatch
-- eyepiece --
Eyer
Eyereach
eyes
eyes-only
Eyesalve
Eyeservant
Eyeservice
eyeshade
eyeshadow
Eyeshot
Eyesight
Eyesore
eyespot
Eyestalk
Eyestone
eyestrain
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