Telescopes Telescopes
The 3.67 m Advanced Electro Optical System Telescope is a Department of Defense telescope at Haleakala Observatory. ...more on Wikipedia about "3.67 m Advanced Electro Optical System Telescope"
Active optics is a relatively new technology for reflecting telescopes. Active optics works by "actively" adjusting the telescope's mirrors. This method is used by, among others, the Nordic Optical Telescope, the New Technology Telescope and the Keck telescopes, as well as all large telescopes built in the last decade. ...more on Wikipedia about "Active optics"
Adaptive optics is a technology to improve the performance of (usually) astronomical telescopes by reducing the effects of atmospheric distortion, or astronomical seeing. Adaptive optics works by measuring the distortion and rapidly compensating for it either using deformable mirrors or material with variable refractive properties. While the technique was theoretically understood for some time, it was only advances in computer technology during the 1990s that finally made the technique practical. Adaptive optics should not be confused with active optics, which works on a longer timescale to correct the primary mirror geometry itself. The simplest form of adaptive optics is tip-tilt correction, which corresponds to correction of the tilts of the wavefront in two dimensions (equivalent to correction of the position offsets for the image). This is performed using a rapidly moving tip-tilt mirror which makes small rotations around two of its axes. A significant fraction of the aberration introduced by the atmosphere can be removed in this way. Tip-tilt mirrors are widely used in night time and solar telescopes, to correct the aberration introduced by the atmosphere on the light path and improve image quality over what would be possible according to the atmospheric seeing. Tip-tilt mirrors are effectively segmented adaptive optics mirrors having only one segment which can tip and tilt, rather than having an array of multiple segments which can tip and tilt independently. ...more on Wikipedia about "Adaptive optics"
An Altazimuth or alt-azimuth mount is a simple mount used for moving a telescope or camera along two perpendicular axes of motion. The vertical movement is known as the altitude, while the horizontal motion is called the azimuth. ...more on Wikipedia about "Altazimuth mount"
There is a strong tradition of amateur telescope making within the amateur astronomy community. ...more on Wikipedia about "Amateur telescope making"
Antarctic Submillimeter Telescope and Remote Observatory, or AST/RO, is a 1.7 meter diameter off-axis telescope for research in astronomy and aeronomy at wavelengths between 0.2 and 2 mm. The instrument is now operating at the South Pole with four heterodyne receivers and three acousto-optical spectrometers. ...more on Wikipedia about "Antarctic Submillimeter Telescope and Remote Observatory"
The New Greek Telescope project of the AI-NOA for the 2.3 m Ritchey-Chretien telescope, funded by the European Commission and the General Secretariat for Research and Technology of the Hellenic Ministry of Development. ...more on Wikipedia about "Aristarchos 2.3 m Telescope Project"
The Atacama Submillimeter Telescope Experiment (ASTE) is a 10m antenna built by Mitsubishi Electric Company as a preprototype for ALMA. ...more on Wikipedia about "ASTE"
The Automated Patrol Telescope (APT) is a wide-field CCD imaging telescope, which is operated by the University of New South Wales at Siding Spring Observatory, Australia. ...more on Wikipedia about "Automated Patrol Telescope"
The Bernard Lyot Telescope is a 2 m Cassegrain telescope operating in the visible domain. It is located at 2878 m elevation on the Pic du Midi in the French Pyrenees. ...more on Wikipedia about "Bernard Lyot Telescope"
The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) is a submillimeter telescope that hangs from a high altitude balloon. It has a 2 meter primary mirror that directs light into bolometer arrays operating at 250, 350, and 500 µm. The project is being carried out by a multi-university consortium headed by the University of Pennsylvania and the University of Toronto which also includes Brown University, the University of Miami, the University of British Columbia, JPL, INAOE, and Cardiff University. ...more on Wikipedia about "BLAST (telescope)"
COAST, the Cambridge Optical Aperture Synthesis Telescope, is a multi-element optical interferometer with baselines of up to 100 metres, designed to observe stars with angular resolution as high as one thousandth of one arcsecond (producing images with much higher resolution than can be obtained using individual telescopes such as the Hubble Space Telescope). The principal limitation is that COAST can only image bright stars. COAST was the first long-baseline interferometer to obtain high-resolution images of the surfaces of stars other than our sun (although the surfaces of other stars had previously been imaged using Aperture Masking Interferometry on the William Herschel Telescope). ...more on Wikipedia about "Cambridge Optical Aperture Synthesis Telescope"
The Canada-France-Hawaii Telescope is located near the mountain top of Mauna Kea in Hawaii at an altitude of 4204 m (13,793 feet). It is a Prime Focus/ Cassegrain configuration with a usable aperture diameter of 3.58 meters. ...more on Wikipedia about "Canada-France-Hawaii Telescope"
The Canopus Hill Observatory houses the Canopus 1 metre telescope and is situated approximately 12 km from Hobart in Tasmania. Because of its extreme southerly latitude (43 degrees South) the telescope provides opportunities for study of the Magellanic Clouds throughout the year. ...more on Wikipedia about "Canopus 1 m telescope"
The Carlsberg Meridian Telescope (formerly the Carlsberg Automatic Meridian Circle) is located at Roque de los Muchachos Observatory in the Canary Islands and is dedicated to carrying out high-precision optical astrometry. ...more on Wikipedia about "Carlsberg Meridian Telescope"
First developed in 1672 by Laurent Cassegrain, a Cassegrain Telescope this type of reflector is a combination of a prime concave and a secondary convex mirror, both aligned axially. The prime mirror usually contains a hole in the centre thus permitting the light to reach an eyepiece, a camera, or a light detector. ...more on Wikipedia about "Cassegrain Reflector"
A catadioptric sensor is a visual sensor that contains mirrors (catoptrics) and lenses (dioptrics). The word catadioptric originally appears in telescope design, but the term catadioptric sensor has come to refer to panoramic sensors created by pointing a camera at a curved mirror. ...more on Wikipedia about "Catadioptric sensor"
The CHARA Array is an astronomical optical interferometer operated by The Center for High Angular Resolution Astronomy (CHARA) at Georgia State University. CHARA is the World's highest angular resolution telescope at infrared wavelengths. The array will eventually have six 1-metre diameter telescopes, making it one of the most powerful imaging interferometers in the world. ...more on Wikipedia about "CHARA array"
A comet seeker is a type of small telescope adapted especially to searching for comets: commonly of short focal length and large aperture, in order to secure the greatest brilliancy of light. ...more on Wikipedia about "Comet seeker"
(Diffraction-limited) The ability to produce optical images with angular separations as small as the instrument's theoretical limit. A telescope with this capability is said to be diffraction limited. ...more on Wikipedia about "Diffraction-limited"
Dioptrics are simple telescopes using two convex lenses. The first lens has a longer focal length and is bigger in aperture. The second lens has a shorter focal length and serves as an eyepiece. The image focused by the first lens converges at the focal point and then is enlarged by the eyepiece. Focusing is achieved by adjusting the distance between eyepiece and point at which the image is formed. ...more on Wikipedia about "Dioptrics"
In astronomy the Dobsonian is a type of alt-azimuth telescope mounting that became popular among amateur astronomers in the 1980s because of its extreme simplicity, low price, and rugged construction. The terms "Dobsonian" or "Dob" may also refer to any telescope that features this type of mount, although the telescopes themselves are typically of Newtonian design. ...more on Wikipedia about "Dobsonian" The Ultimate shortopedia Machine.
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