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Topic: Optical telescope


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 Telescope - Wikipedia, the free encyclopedia
Telescopes work by employing one or more curved optical elements - lenses or mirrors - to gather light or other electromagnetic radiation and bring that light or radiation to a focus, where the image can be observed, photographed or studied.
Optical telescopes are used for astronomy and in many non-astronomical instruments including theodolites, transits, spotting scopes, monoculars, binoculars, camera lenses and spyglasses.
The telescope was aimed by the aid of a Foucault sidérostat, which is a movable plane mirror with a 2 m diameter, mounted in a large cast-iron frame.
en.wikipedia.org /wiki/Telescope   (2171 words)

  
 Alignment Optical Telescope (AOT)
The alignment optical telescope, mounted on the navigation base to provide mechanical alignment and a common reference between the telescope and the inertial measurement unit, is a unity-power, periscope-type device with a 6 conical field-of-view.
The alignment optical telescope is used for in-flight and lunar surface sightings.
A thumbwheel on the assembly is ussd to adjust the brightness of the telescope's reticle lamps.
www.hq.nasa.gov /office/pao/History/alsj/aot.htm   (1248 words)

  
 Nordic Optical Telescope - Wikipedia, the free encyclopedia
The Nordic Optical Telescope (NOT) is an astronomical telescope located at Roque de los Muchachos Observatory, La Palma in the Canary Islands.
The service building and dome of Nordic Optical Telescope situated above the clouds at the top of Roque de los Muchachos, La Palma.
The NOT was the first major telescope facility designed to use active optics to correct the shape of a thin, lightweight primary mirror supported on actuators.
en.wikipedia.org /wiki/Nordic_Optical_Telescope   (230 words)

  
 OMEGA Optical Telescope
The main use of an optical telescope on Omega is configured as a streaked optical pyrometer for radiation temperature measurements in hohlraums.
The TIM-based portion of the telescope would be a flexible instrument capable of being configured for a specific experiment and pre-aligned at an alignment station to insure proper positioning of the optical elements.
Optical elements should be continuously positionable along the length of the optical assembly and a mechanism for alignment should be provided.
fjwsys.lanl.gov /oertel/SOP/telescope.html   (1141 words)

  
 Oldham Optical Telescope Design page
They have already been warned that the telescope tube must be big enough for their field of view, but they may not be conscious that the focuser fitted to their telescope may well impose a restriction on the maximum possible fully illuminated field.
A telescope having a large field of view is attractive, - 35mm Cameras, (or even larger), may be attached as well as simply using the telescope for direct viewing by eye, - but having a large field does have drawbacks.
However, Amateur telescope builders who intend to use their telescope for Astrophotography with a 35mm or medium format camera require a larger field of view may be very interested.
www.oldham-optical.co.uk /Design.htm   (3080 words)

  
 IIA > IAO > 2M Telescope
A 2-m aperture optical-infrared telescope, the Himalayan Chandra Telescope (HCT) manufactured by the EOS Technologies Inc., Tuscon, Arizona, USA is installed at IAO.
The telescope is equipped with 3 science instruments which are mounted on an instrument mount cube at the cassegrain focus of the telescope.
The telescope is remotely operated from CREST, Hosakote, via a dedicated satellite link.
www.iiap.res.in /iao/2mtel.html   (108 words)

  
 6m telescope short description
The optical scheme of the telescope provides for working at the prime focus (f/4) and two Nasmith foci (f/30).
The diameter of the main mirror is 605 cm, the diameter of the cilindrical prime focus cage, where optical devices and the mechanisms of input/output of the lens corrector and hyperbolic secondary focus mirror are located, is 2 m.
SAO ensures the telescope being operative and carries out continuous work to provide BTA with modern techniques of astrophysical data accumulation and processing.
www.sao.ru /Doc-en/Telescopes/bta/descrip.html   (240 words)

  
 The Mayall 4-Meter Telescope
The telescope is mounted on a cement pier that is completely separate from both the building and the dome, although the telescope and dome move in unison.
The Mayall Telescope is equipped with a wide field imager camera, the CCD Mosaic, This camera has 8192 x 8192 pixels and produces color pictures of astronomical objects such as M 101, the Pinwheel Galaxy.
The telescope's 15 ton primary mirror is polished to one millionth of an inch and has a reflective aluminum coating one thousandth the thickness of a human hair.
www.noao.edu /outreach/kptour/mayall.html   (488 words)

  
 optical telescope concept from the Astronomy knowledge base
A space-based reflecting telescope with a primary mirror diameter of 2.4 m (94 in) capable of high-resolution imaging from the far ultraviolet to the near infrared.
By contrast, a reflecting telescope is one in which light is focused by a mirror., Telescope that uses lenses to magnify and focus an image onto an eyepiece.
refractor (12 kinds, 163 facts) - A telescope in which the light is focused by a lens at the viewing side of the telescope.
www.site.uottawa.ca:4321 /astronomy/opticaltelescope.html   (300 words)

  
 Hobby-Eberly Telescope - General Information
The HET is one of the world's largest optical telescopes, with an effective aperture of 9.2 meters and a 78 square meter, hexagonal mirror array made from 91 segments.
Because of the precision required of large optical mirrors for quality image resolution, large telescopes of traditional design must compensate for the distortion effects of gravity on mirrors as they're moved through angles of declination.
Periodically, the telescope is rotated to the CCAS Tower for precise alignment of segments across the array.
www.as.utexas.edu /mcdonald/het/het_gen_01.html   (382 words)

  
 Optical Astronomy
The SOAR telescope is a Project for a 4.2-meter aperture telescope funded by a partnership between the USA National Optical Astronomy Observatories (NOAO), the Country of Brazil, Michigan State University, and the University of North Carolina at Chapel Hill.
The Large Binocular Telescope (LBT) is a collaboration between Arizona (25%), Italy (25%, represented by the Arcetri Astrophysical Observatory in Florence), Research Corporation (12.5%), the Ohio State University (12.5%), and Germany (25%, represented by the LBT Beteiligungsgesellschaft).
The Hobby-Eberly telescope (HET) is a new 9 meter telescope, built at the University of Texas McDonald Observatory near Ft.
www.cv.nrao.edu /fits/www/yp_optical.html   (11715 words)

  
 Nordic Optical Telescope
The Nordic Optical Telescope (NOT) Scientific Association (NOTSA) was founded in 1984 to construct and operate a Nordic telescope for observations at optical and infrared wavelengths.
In January 1984, the Nordic Optical Telescope Scientific Association was formed and NOTSA Council members as well as a NOTSA Director (Arne Ardeberg) were appointed.
A Nordic Optical Telescope Committee was formed in September 1982.
geena.not.iac.es /general/notsa   (369 words)

  
 APOD: September 1, 1996 - VLT: A New Largest Optical Telescope
In the optical, this title was long held by the Hale 200-inch, and is presently held by the Keck telescopes in Hawaii.
But an even larger optical telescope is being built.
The first of these telescopes should be completed in 1997, and all four should be completed and working together sometime in the year 2000.
antwrp.gsfc.nasa.gov /apod/ap960901.html   (170 words)

  
 Howstuffworks "How Telescopes Work"
A telescope is a device used to magnify distant objects.
In this article, we will examine how a telescope works, discuss the various types of telescopes and take a look at telescope mounts and accessories.
Optical Design: Newtonians, Optical Diameter: 70 mm, Focal Length: 350 mm, Max Useful Magnification: 240 x, Mount Type: Altazimut...
www.howstuffworks.com /telescope.htm   (214 words)

  
 21 Inch Optical Telescope
An optical spectragraph was constructed for the telescope in 1997.
The present 21-inch telescope is on an equatorial mount and has two dedicated CCD cameras (an SBIG ST-6 and ST-4), as well as a networked computer system for gathering and reducing data.
CCD images taken with the 21-inch telescope were aquired by an undergraduate, Rory Barnes, who is now at the University of Washington.
www.as.arizona.edu /department/res_facil/opt_tele.html   (167 words)

  
 UVOT Homepage
The UVOT is a 30 cm modified Ritchey-Chretien UV/optical telescope CO-aligned with the X-ray Telescope and mounted on the telescope platform common to all instruments.
Since UVOT has photon counting detectors, which are able to retain individual photon positions and timing information, it operates in a mode more similar to typical x-ray telescopes than to typical optical telescopes.
This observation was made using a large ground-based telescope (the 4.2 meter William Herschel Telescope, observation by Paul Groot) when it was around magnitude 20.
www.swift.psu.edu /uvot   (618 words)

  
 Asaph Hall --  Encyclopædia Britannica
The most important of all the powers of an optical telescope is its light-gathering power.
This capacity is strictly a function of the diameter of the clear objective—that is, the aperture—of the telescope.
It was discovered telescopically with its companion moon, Deimos, by the American astronomer Asaph Hall in 1877 and named for one of the sons of Ares, the Greek counterpart of the Roman god Mars.
www.britannica.com /eb/article?tocId=9038905&ref=news0105   (806 words)

  
 :::Astro Optical Supplies::: Telescope Mirror Cleaning & Recoating Services
If you notice a yellowing of the image or loss of definition as compared to the other similar sized telescope then the mirror most likely needs to be cleaned and/or recoated.
Try testing your telescope alongside another new or recently recoated telescope with the same eyepiece.
Nearly all reflecting telescope sytems will require a recoat after this amount of time.
www.astro-optical.com.au /mirror.php   (317 words)

  
 Astronomy News
Telescopes with large separations or baselines can act as if they are one telescope with the diameter of the baseline.
Naturally, the telescope must be suitably equipped with adequate filtration to ensure safe solar viewing.
RAVE (RAdial Velocity Experiment) is an all-sky survey (complete to V = 16) to measure the radial velocities, metallicities and abundance ratios of 50 million stars using the 1.2-m UK Schmidt Telescope of the Anglo-Australian Observatory (AAO), together with a northern counterpart, over the period 2006 - 2010.
www.astronomy.swin.edu.au /sao/astronomynews/index-S12003.php   (2467 words)

  
 SOFTWARE FRAMEWORK FOR SIMULATION OF ADAPTIVE OPTICAL MEMBRANE TELESCOPE
The simulation and control of a space-based deployable optical telescope with a membrane reflector is a complex task for which existing simulation tools are cumbersome at least, if not totally inadequate.
The behavior of an optical membrane telescope mirror is fundamentally nonlinear, and hence its computer simulation presents a challenge.
Large precision structures designed to withstand the rigors of outer space are required by the United States Air Force for radio frequency (RF) antennas, solar concentrators, and optical telescopes.
www.arc.unm.edu /~jtang/OSA_paper.htm   (2041 words)

  
 biggest optical refracting telescope
known that the refracting telescope is capable of yielding perhaps the finest optical imaging...
Currently the biggest optical telescope mirror is being installed on the Keck Telescope on top of Mauna Kea...
The largest optical reflecting telescope has a mirror that is 10-meters...
www.telescopes-guide.com /biggest-optical-refracting-telescope   (397 words)

  
 GRB 000926
"Using the ALFOSC on the 2.5m Nordic Optical Telescope, we have obtained 4700sec of further R-band imaging of the Optical Transient (OT) of GRB 000926 (GCN #801, #803, #804) on 2000 Oktober 27.
"Using the ALFOSC on the 2.5m Nordic Optical Telescope we have obtained further R-band imaging of the Optical Transient (OT) of GRB 000926 (GCN #801, #803, #804) on 2000 October 2.84 and 6.87 UT.
"Using the ALFOSC on the 2.5m Nordic Optical Telescope, we have obtained U,B,R and I-band imaging of the field of GRB 000926 (Hurley et al., GCN #801) on 2000 September 27.8-28.1 UT. Comparing with DSS-2 (red) we find a bright point source not visible on the DSS-2 exposure.
www.astro.ku.dk /~brian_j/grb/grb000926   (1217 words)

  
 Large Telescopes
For the largest selection of telescopes in the world please visit telescopes.com
Four separate telescopes; optimized for surveys; cheaper than LSST
was once (briefly) the largest telescope in the world
astro.nineplanets.org /bigeyes.html   (160 words)

  
 288x50mm Astrolon Telescope (snh36944) Science Tech Science Optical Telescope/Refractor
288x50mm Astrolon Telescope (snh36944) Science Tech Science Optical Telescope/Refractor
The Barlow lens increases the magnification of the telescope.
The telescope mounts to a 35" (89cm) aluminum tripod.
www.hobbylinc.com /htm/snh/snh36944.htm   (48 words)

  
 Nordic Optical Telescope - Wikipedia, the free encyclopedia
The Nordic Optical Telescope (NOT) is an astronomical telescope located at Roque de los Muchachos Observatory, La Palma in the Canary Islands.
The service building and dome of Nordic Optical Telescope situated above the clouds at the top of Roque de los Muchachos, La Palma.
The NOT was the first major telescope facility to use active optics to correct the shape of a thin, lightweight primary mirror.
en.wikipedia.org /wiki/Nordic_Optical_Telescope   (216 words)

  
 Lund Observatory
For a telescope intended for use in the optical as well as in the infrared wavelength ranges, the design of the top end and the secondary mirror has to be discussed with special care.
Taking into account all major parameters defining site quality for observations in the optical and infrared wavelength regions and, at thesame time, assigning high weight to image quality, it was decided to locate the telescope on the premises of the Observatorio del Roque de los Muchachos.
The finder telescope is a refractor with a free aperture of 153 millimetres and a focal length of 2130 millimetres.
www.astro.lu.se /Resources/NOT/proptxt.html   (11626 words)

  
 Orbiting Astronomical Observatories
These telescopes were flown on crewed missions and usually taken back to Earth when the mission landed.
HEAO 3 was launched on September 20, 1979, carried Gamma ray telescopes, and was active until it finally ceased operation on May 29, 1981.
Far IR and Submillimeter Space Telescope; to observe objects in the 85 to 900 micron part of the spectrum.
www.seds.org /~spider/oaos/oaos.html   (2828 words)

  
 NRC-HIA: Very Large Optical Telescope
Canada has a share of the state-of-the-art twin 8-metre Gemini telescopes and has started to investigate even larger optical telescopes that will follow the current generation of 8–10 metre ones.
We currently envisage replacing the Canada-France-Hawaii Telescope (CFHT), on the summit of Mauna Kea, with a 20-metre telescope.
Proposed 20-metre telescope enclosure on the CFHT site on Mauna Kea
www.hia-iha.nrc-cnrc.gc.ca /projects/VLOT_e.html   (78 words)

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