Optical Telescopes

Types of Telescopes - Optical Telescopes
... An optical telescope gathers and focuses light mainly from the visible part of the electromagnetic spectrum (although some work in the infrared and ultraviolet) ... Optical telescopes increase the apparent angular size of distant objects as well as their apparent brightness ... for the image to be observed, photographed, studied, and sent to a computer, telescopes work by employing one or more curved optical elements, usually made from glass lenses and/or mirrors, to gather ...

List Of Telescope Types - List of Optical Telescope Types
... Optical telescopes can be classified by three primary optical designs (refractor, reflector, or catadioptric), by sub-designs of these types, by how they ... Refracting telescopes (Dioptrics) Achromatic telescope dialytic refractor Apochromatic Binoculars Opera glasses Copyscope Galileoscope Monocular Non-achromatic Galilean telescope Keplerian Telescope Aerial ...

History Of The Telescope - Optical Telescopes - Large Reflecting Telescopes - The Era of Adaptive Optics
... See also Adaptive optics The 1990s saw a new generation of giant telescopes appear, beginning with the construction of the first of the two 10 m (390 in ... Other giant telescopes built since then include the two Gemini telescopes, the four separate telescopes of the Very Large Telescope, and the Large Binocular Telescope ... These telescopes all depend on adaptive optics (AO), the latest technology used to improve the performance of telescopes ...

List Of Largest Optical Reflecting Telescopes
... This list of the largest optical reflecting telescopes with objective diameters of 3.0 metres (120 in) or greater is sorted by aperture, which is one limit on the light-gathering power ... The mirrors themselves can be larger than the aperture, and telescopes may use aperture synthesis achieved by interferometry ... Telescopes designed to be used as optical astronomical interferometers such as the Keck I and II used together as the Keck Interferometer (up to 85 meters) can reach very high ...

List Of Largest Optical Refracting Telescopes
... Here is a list of the largest optical refracting telescopes sorted by lens diameter and focal length ... The largest practical functioning refracting telescope is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific observation for over a century ... refractors include a 21st century Solar telescope which is not directly comparable because it uses a single element non-achromatic lens, and the short-lived Great Paris Exhibition Telescope of 1900 ...