Type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope).- Refracting telescope
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Telescope that gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to collect data through electronic image sensors.
Refracting telescopes, which use lenses and less commonly also prisms (dioptrics)
Branch of optics dealing with refraction, similarly the branch dealing with mirrors is known as catoptrics.
Telescopes that create their image with an objective that is a convex lens (refractors) are said to be "dioptric" telescopes.
Optical element that gathers light from the object being observed and focuses the light rays to produce a real image.
In a telescope the objective is the lens at the front end of a refracting telescope (such as binoculars or telescopic sights) or the image-forming primary mirror of a reflecting or catadioptric telescope.
Transmissive optical device which focuses or disperses a light beam by means of refraction.
The practical development and experimentation with lenses led to the invention of the compound optical microscope around 1595, and the refracting telescope in 1608, both of which appeared in the spectacle-making centres in the Netherlands.
German astronomer, mathematician, astrologer, natural philosopher and writer on music.
Additionally, he did fundamental work in the field of optics, invented an improved version of the refracting (or Keplerian) telescope, and was mentioned in the telescopic discoveries of his contemporary Galileo Galilei.
Optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects, or various devices used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation.
The first known practical telescopes were refracting telescopes with glass lenses and were invented in the Netherlands at the beginning of the 17th century.
Failure of a lens to focus all colors to the same point.
For example, this could result in extremely long telescopes such as the very long aerial telescopes of the 17th century.
Type of lens that is attached to a variety of optical devices such as telescopes and microscopes.
These eyepieces work well with the very long focal length telescopes (in Huygens day they were used with single element long focal length non-achromatic refracting telescopes, including very long focal length aerial telescopes).
Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects.
Telescope that uses a single or a combination of curved mirrors that reflect light and form an image.
The reflecting telescope was invented in the 17th century by Isaac Newton as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic aberration.