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

(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.
References in periodicals archive ?
A clear corneal self-sealing tunnel incision was given supero-tempor or temporal depending upon the astigmatism with 2.75 mm keratome, continuous curvilinear capsulorehxis (CCC) performed, lens matter removed with phaco-aspiration and simco cannula, foldable monofocal acrylic non chromophoreintra ocular lens implanted in capsular bag, viscoelastic removed, intracameral moxifloxacin, miochol injected and wound sealed, siedel negative with hydration, making the eye tense (tamponade effect) at the end of surgery to reduce chances of retinal detachment.
Visual outcome in diabetic patient after phacoemulsification with intra ocular lens implant is comparable to the results in non-diabetic patient if the diabetics have no retinopathy and have good glycemic control.
Describing the normal range of this index is very important in the choice of formula used for Intra Ocular lens. The results from our study show the average AL in our population to be lower than that seen in various other regions of the world.
Clark, "Cell fate and differentiation of the developing ocular lens," Investigative Ophthalmology and Visual Science, vol.
To this end ocular lens cells have developed a remarkable strategy: They have thrown overboard the complex machinery present in all other cells of the human body for building up and breaking down proteins.
Proteolytic mechanisms underlying mitochondrial degradation in the ocular lens. Invest Ophthalmol Vis Sci.
An intra ocular lens was implanted by scleral fixation technique to provide the best possible post-operative visual rehabilitation.
In the late 1950s or early 1960s a couple of companies--Davis and Lischert--began marketing long eye relief ocular lens extensions for the Weaver K series M and some Leupold rifle scopes.
His hypothesized mechanism for the observed association is that the ocular lens functions similarly to the proverbial canary in a mine shaft.
The ocular lens is 28mm in diameter and the objective lens is a monsterous 38mm.