eyepiece

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eyepiece

 [i´pēs]
the lens or system of lenses of a microscope (or telescope) nearest the user's eye, serving to further magnify the image produced by the objective. Called also ocular.

eye·piece

(ī'pēs),
The compound lens at the end of the microscope tube nearest the eye; it magnifies the image made by the objective lens.

eyepiece

/eye·piece/ (-pēs) the lens or system of lenses of a microscope (or telescope) nearest the user's eye, serving to further magnify the image produced by the objective.

eyepiece

(ī′pēs′)
n.
The lens or lens group closest to the eye in an optical instrument; an ocular. Also called eyeglass.

eye·piece

(ī'pēs)
The compound lens at the end of the microscope tube nearest the eye; it magnifies the image made by the objective.

eyepiece

The lens or combination of lenses in an optical instrument (microscope, telescope, etc.) through which the observer views the image formed by the objective. The most common eyepieces are composed of two single lenses or two doublets: the lens or doublet nearer the eye is called the eye lens and the one nearer the objective is called the field lens. The role of the eyepiece is to magnify the image and to reduce the aberrations of the image formed by the objective. Syn. eye lens; eyeglass; ocular.
Huygens' eyepiece Negative eyepiece used commonly in microscopes. It consists of two planoconvex lenses mounted with their plane surfaces facing the eye. In the most common type the eye lens has a focal length half that of the field lens and the separation is equal to half the sum of the two focal lengths.
negative eyepiece Eyepiece made up of two lenses, in which the first principal focus of the eyepiece lies between the two lenses, such as in a Huygens' eyepiece.
orthoscopic eyepiece An eyepiece corrected for distortion, and which provides a wide field of view and high magnification. It consists of a triplet field lens and a single eye lens. It is used in high-power telescopes and range finders. See triplet.
positive eyepiece Eyepiece made up of two lenses in which the first principal focus of the eyepiece lies in front of the field lens, such as in a Ramsden eyepiece.
Ramsden eyepiece Positive eyepiece consisting of two planoconvex lenses mounted with their convex side facing each other and having equal focal lengths. The lenses are usually separated by two-thirds the focal length of either.

eyepiece

the lens or system of lenses of a microscope (or telescope) nearest the user's eye, serving to further magnify the image produced by the objective.
References in periodicals archive ?
Although monocentric, orthoscopic, and Plossl eyepieces all provide decent eye relief, about 70% to 80% of their focal length, the short focal lengths required for planetary observing involve squinting through tiny eye lenses located a small fraction of an inch from your eye.
According to Anderson, 'our proprietary holographic photopolymers have been developed and refined for over two decades, and along with our ability to design and develop complex holographic recording systems, we have a unique insight into how to use holography to create the most elusive and difficult component of an AR headset: a thin, transparent eyepiece that provides good display performance at a reasonable cost.
For youngsters, one of the most difficult parts of using a telescope is realizing that they need to look through the eyepiece rather than at the eyepiece.
The second is the price, $1199, with the fixed eyepieces running $299 and the variable $379.
6 -- color) A model wears the Communicator around her waist and the Eyepiece, above.
Many different objectives are available, but, as with eyepieces, higher power reduces working distance, which frequently dictates microscope requirements and limits the power.
To rotate the eyepiece, loosen the lock ring ahead of the prism housing, then tighten it again to retain the eyepiece in the chosen position.
Night vision electronics in the guise of a telescope eyepiece cuts through the dust as if it were not there.
Tenderers must provide the technical conditions required for the implantation of eyepieces are offered, including the case of the necessary instrumentation and lenses to bend the injectors as well.
You can easily exceed these limits just by using different eyepieces (see the next section), but you will rarely accomplish much besides making the image fuzzier and fainter.
The microscope line also includes 3-D binocular and Stereo-Zoom trinocular systems, and Video-Zoom, with a wide range of standard features and accessories such as extra-large (22 mm) eyepieces, coated prism optics, parfocal zoom, 90 mm working distance, metal body for ESD safety, 45[degrees] eyepieces, and protective eyeguards.