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eyepiece    音标拼音: ['ɑɪp,is]
n. 接眼镜;窥视孔

接眼镜;窥视孔

eyepiece
n 1: combination of lenses at the viewing end of optical
instruments [synonym: {eyepiece}, {ocular}]

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]


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  • Eyepiece - Wikipedia
    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 named because it is usually the lens that is closest to the eye when someone looks through an optical device to observe an object or sample
  • Telescope Eyepieces Guide - High Point Scientific
    For a high power eyepiece (2032 300) you could go with a 6mm or 7mm eyepiece For a medium power eyepiece (approximately 150X) a 13mm or 14mm eyepiece would do For a low power eyepiece (about 75X), which are great for finding and centering or observing very large and close objects like the Moon or Sun, an eyepiece between 25mm and 30mm would
  • Telescope Eyepieces - Agena Astro
    Each type of eyepiece has its own pros and cons, such as the size of the FOV, the degree of eye relief, and the sharpness of the image Most beginner telescopes come with one or two Plossl eyepieces included, commonly around 10mm and 25mm focal lengths Eyepiece Eye Relief
  • Which Telescope Eyepiece Is Right for You? - Sky Telescope
    Simpler eyepiece designs tend to have apparent fields of about 45°; widefield designs may be 60° or more What is sometimes more important to the user is the true field of view, which is obtained by dividing the apparent field by the magnification the eyepiece delivers For example, consider a 10 mm-focal-length eyepiece of 50° apparent
  • Choosing the Correct Eyepiece - Edmund Optics
    The eyepiece is an integral part of any compound visual system Its purpose is to magnify the real image formed by an objective or intermediate relay system For this reason, the eyepiece design affects the magnification, image brightness, field flatness, and aberrations of these systems As in all optical systems, the designer trades one
  • Best eyepieces for telescopes 2025: A crucial telescope accessory to . . .
    A wider eyepiece, on the other hand, is more suitable for viewing nebula, galaxies and other deep-space objects April 27 is a new moon and the darker night sky makes it easier to spot
  • Telescope Eyepiece Types Explained: From Plossl to Nagler, 12 Optical . . .
    Eyepiece types, meaning the eyepiece optical design itself, is rarely discussed when people are talking eyepieces They talk about apparent magnification, edge sharpness, contrast, field of view, and other specifications, but rarely the actual optical design
  • Telescope Eyepiece Sizes (Full Guide)
    The eyepiece is the last element through which light passes before it reaches the eye, thus greatly influencing the viewing experience Understanding telescope eyepiece sizes is paramount for any avid stargazer or aspiring astronomer Knowing the ins and outs of telescope eyepiece sizes is vital
  • Telescope eyepieces, how to choose and best ones to buy
    How do eyepieces work, what are the different types and which are the best eyepieces for your telescope? Find out in our beginners' guide





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