.

... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

. home . product . gallery . contact .

Beginning from the May of the 1997 we started to publish our daily solar radio observations at RATAN-600 radiotelescope. ... Periscope System: South Sector+Flat Mirror . ... It is possible to track a source by moving the secondary mirror along the arc-shaped railway tracks or to perform azimuthal 2D map synthesis . ... 1) It is possible to simultaneously carry out independent observing programs using individual sectors at various discrete azimuths and secondary mirrors on corresponding railway tracks. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

... The very demanding goal of 50 milliarcseconds root-mean-square (mas RMS) for the astrometric precision of the Sloan Digital Sky Survey implies that focus and collimation motions of the secondary must be very smooth. The Apache Point Observatory 3.5-m telescope secondary is a hot-gas-fusion borosilicate lightweight (25% of solid) mirror. ... Differential rotation provides tilt motions. ... Also, we made measurements with the indicators sensing the motion of the whiffletrees near actuators 1 and 2. ...

... Focus ? ... HST's Optical Telescope Assembly (OTA) refers to the primary and secondary mirrors, and the truss structure supporting them. ... Conventions: In this document, we express all focus changes in the SI-independent units of secondary mirror microns. ... Desorption compensating Secondary Mirror moves are made when we determine a focus state of -1.5 microns based on fitting measured PC focus points, again ensuring 1 sigma variations stay within the adopted tolerance. ...

Copies of The Nine Planets are maintained at several dozen different locations around the world in addition to my primary site at SEDS. ... You may find it faster to access one of the mirror sites that's near to you. ... The Nine Planets has been translated into French , Spanish , Italian , Polish , Portuguese , Slovenian, Norwegian , French , Dutch , Danish, German , Chinese, and Japanese . ... This mirror and a Dutch translation of TNP are maintained by Guido Hemeleers . ... Mirrors .. ...

Magnification (Power) And Using Eyepieces . ... To determine power in a telescope, divide the focal length of the telescope by the focal length of the eyepiece. By exchanging an eyepiece of one focal length for another, you can increase or decrease the power of the telescope. For example, a 25mm eyepiece used on a telescope with a 1000mm focal length would yield a power of 40x (1000 / 25 = 40) and a 10mm eyepiece used on the same telescope would yield a power of 100x (1000 / 10 = 100). ...

The telescope of Galilei was invented in 1609. Telescope (from tele ... and scope ) is an astronomic instrument for the celestial luminaries study on their electromagnetic radiation. The telescopes are divided into gamma-telescopes, X-rays and ultraviolet, optical, infrared and radiotelescopes. ... The first astronomic observations with telescopes (optical refractor) were carried by Galilei in 1609. Back . ...

... Technicians from Ball Aerospace and NASA at Marshall Space Flight Center's X-ray and Cryogenic Facility, of course, testing primary mirror segments of the James Webb Space Telescope (JWST). Scheduled for launch in 2014, JWST will be optimized for the infrared exploration of the early Universe, utilizing a primary mirror 21.3 feet across, composed of 18 hexagonal segments. Here, a group of JWST mirror segments are being prepared for tests to assure they meet the exacting mission requirements. ...

XMM-Newton Science Analysis System Page: 1 rgscombine June 28, 2006 Abstract Combines a list of spectrum les to create one combined spectrum le, and the corresponding list of response matrices and background spectrum, to create one nal response matrix and background spectrum le, for a paticular RGS instrument and spectral order. ... A list of response matrix les, as produced by rgsrmfgen or rgsproc. A list of background spectrum les as produced by rgsspectrum or rgsproc for TOTAL spectra. ...

RTT150 . ... This optical scheme is similar to 1:7.7 system but has the different parameters of secondary mirror 2 and corrector 3. Primary mirror 1 reflects light to the secondary mirror 2 which collects it on the focal surface of system. Lens corrector 3 is placed between focal surface and the secondary mirror which allows to obtain large flat linear field of 100 mm diameter. Focal length, mm . ... Linear field of view, mm . ... Angular field of view . ... 0.039 mm, %, at least . ...

Instruments and Methods 125 Long time tracking of the Sun with RATAN-600 in Radio Schmidt mode V.B. Khaikin, E.K. Ma jorova, I.G. E mov, O.A. Victorov, V.M. Bogod, and S.Kh. ... Cosmic source tracking with unmovable main mirror in a form of cylinder requires a special secondary mirror of double curvature 12 m size or a phased array in the focal plane of an ordinary secondary mirror Ka jdanovskij, 1980. ... Fig. 4 shows the Sun tracking with new drive in speed control mode starting from meridian. ...

At Arecibo we have a variety of optical instruments that we use to study terrestrial airglow emissions. ... As a complement to the airglow instrumentation we also maintain a set of optical instruments, called lidars, used for "active" remote sensing of the atmosphere. That is, we generate our own source signal using lasers and measure the characteristics of the light scattered back from the atmosphere. ... An operations manual for the Optical Laboratories is currently under major revision. ...

... Telescopes ћ Binoculars ћ Microscopes . Meade Ultra-High Transmission coatings (UHTC ) Group . ... Meade Standard Coatings: The optical surfaces of all Meade telescopes include high-grade optical coatings fully consistent in quality with the precision of the optical surfaces themselves. ... These specialized, and extremely advantageous, coatings are offered here as the Meade Ultra-High Transmission Coatings (UHTC) group, a coatings group available optionally on many Meade telescope models. ...

Copies of The Nine Planets are maintained at more than 50 different locations around the world in addition to my primary site at SEDS. ... The Nine Planets has been translated into French , Italian , Polish , Portuguese , Slovenian , Norwegian , Dutch , German , Chinese , and Japanese . ... This mirror is maintained by Alan Cairns . ... This mirror is maintained by the site's Webmaster . ... This mirror and a Dutch translation of TNP are maintained by Guido Hemeleers . ... Mirrors .. ...

... The spectroscopic data were obtained with the 6m telescope of the Special Astrophysical Observatory of Russian Academy of Science (SAO RAS) during run in October 1999. ... The widths of the slit of 1.2 and 2 were used. ... Observations have been conducted mainly under the software package NICE in MIDAS, described by Kniazev & Shergin ([ 1995 ]). ... All primary data reduction was carried out in the standard way, similar to that described in Kniazev et al. ([ 2000b ]). ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Lightcurve of HW Vir from images obtained using the Faulkes Telescope South, operated by Las Cumbres Observatory . The blue triangles show the difference between two stars whose brightness is constant. ... This shows the value of the Faulkes Telescopes in the follow-up observations of eclipsing binaries with the aim to detect and characterise additional circumbinary companions. ...

Telescope Tip-Tilt Secondary Mirror The tip-tilt secondary mirror on the ANU 2.3 m telescope · Measures and adjusts image position at 30 Hz · Corrects image blur produced by turbulence in the Earth's atmosphere · Both the tip-tilt secondary mirror and the 2.3 m telescope were designed and constructed by RSAA ...