telescope$82074$ - translation to ελληνικό
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telescope$82074$ - translation to ελληνικό

TYPE OF OPTICAL TELESCOPE
Refractor; Refractor telescope; Refractive telescope; Galilean Telescope; Refracting Telescope; Galilean telescope; Keplerian telescope; Keplerian Telescope; Refractor Telescope; Kepler refractor; Galileo Telescope; Galileo's telescope; Refractory telescope

telescope      
n. τηλεσκόπιο
field glass         
PAIR OF TELESCOPES MOUNTED SIDE-BY-SIDE
Field glass; Binocular instrument; Field Glasses; Field glasses; Binocular Instrument; Binocs; Binocular telescope; Prism binoculars; Phase correction coating; Binoc; Periscope binoculars
τηλεσκόπιο
field glasses         
PAIR OF TELESCOPES MOUNTED SIDE-BY-SIDE
Field glass; Binocular instrument; Field Glasses; Field glasses; Binocular Instrument; Binocs; Binocular telescope; Prism binoculars; Phase correction coating; Binoc; Periscope binoculars
διόπτρες

Ορισμός

Refractor
·noun Anything that refracts.
II. Refractor ·noun A refracting telescope, in which the image to be viewed is formed by the refraction of light in passing through a convex lens.

Βικιπαίδεια

Refracting telescope

A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope). The refracting telescope design was originally used in spyglasses and astronomical telescopes but is also used for long-focus camera lenses. Although large refracting telescopes were very popular in the second half of the 19th century, for most research purposes, the refracting telescope has been superseded by the reflecting telescope, which allows larger apertures. A refractor's magnification is calculated by dividing the focal length of the objective lens by that of the eyepiece.

Refracting telescopes typically have a lens at the front, then a long tube, then an eyepiece or instrumentation at the rear, where the telescope view comes to focus. Originally, telescopes had an objective of one element, but a century later, two and even three element lenses were made.

Refracting telescope is a technology that has often been applied to other optical devices, such as binoculars and zoom lenses/telephoto lens/long-focus lens.