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Slide 1
Slide 1

... José Vaquero found a similar result which he reported at the 2nd Workshop in Brussels. Sarychev & Roshchina report in Solar Sys. Res. 2009, 43: “There is evidence that the Greenwich values obtained before 1880 and the Hoyt–Schatten series of Rg before 1908 are incorrect”. ...
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Modern Optical Engineering
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1 Scope

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... instrument  is  a  dual  channel  spectrograph  that  simultaneously  measures  spectra  in  both  the  blue  and   red  portions  of  the  visible  spectrum  using  two  separate  cameras  equipped  with  science  grade  CCD   detectors. ...
First steps of the development of a fiber optic piston sensor for
First steps of the development of a fiber optic piston sensor for

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Discovery of Cluster-Scale Lensed Quasars using the Subaru

Analysis And Design Of Wide-angle Foveated Optical
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MANU-CHAO: A Ground-Layer Adaptive Optics Experiment for the
MANU-CHAO: A Ground-Layer Adaptive Optics Experiment for the

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HEINE T Master Catalogue
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Untitled - Cambridge University Library
Untitled - Cambridge University Library

... that another problem, the distortion in colour and clarity of a distant object viewed through several lenses (chromatic aberration), might be more difficult to solve. One way to overcome this problem was to use a mirror instead of a lens to gather light into the telescope. The construction of a reflec ...
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Chromatic aberration in petawatt-class lasers - hb.fh
Chromatic aberration in petawatt-class lasers - hb.fh

... rmax and due to the large aperture needed in ultra-high peak power lasers, chromatic aberration significantly affects the performance of these systems and hence cannot be neglected for large beam diameters. 2.2 Pulse time delay in ultra-high peak power lasers To date, pulse energy and peak power are ...
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Night-time image quality at Roque de los Muchachos Observatory

Mirrors vs. Dielectric vs. Prism Diagonal Comparison
Mirrors vs. Dielectric vs. Prism Diagonal Comparison

... brightness of the furthest extents of nebula, ability to see stars at the threshold of vision, chromatic aberration on bright stars, and scatter around bright stars. The Takahashi TSA-102 f/8 Super APO was used for all tests. However, since it is popularly reported that a prism diagonal can induce c ...
Wavefront Aberration - University of Arizona
Wavefront Aberration - University of Arizona

... an image formed in the absence of aberration because strictly speaking any image is diffraction limited, regardless of how much aberration is present in the optical system used to form the image. ...
Optical interferometry in astronomy
Optical interferometry in astronomy

... interferometry. By combining light collected by widely separated telescopes, interferometrists can overcome the diffraction-limit of an individual telescope. The angular resolution achieved by current instruments is indeed astounding, <5 × 10−9 rad (1 milli-arcsecond), as are the engineering feats o ...
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Astronomical seeing conditions as determined by turbulence modelling and optical measurement

... Modern space geodetic techniques are required to provide measurements of millimetrelevel accuracy. A new fundamental space geodetic observatory for South Africa has been proposed. It will house state-of-the-art equipment in a location that guarantees optimal scientific output. Lunar Laser Ranging (L ...


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Design, fabrication, and open-loop control of micro deformable mirrors for Contents
Design, fabrication, and open-loop control of micro deformable mirrors for Contents

... ground-based instrument intended for observation of Jovian exoplanets, with the help of high spatial resolution DMs having thousands of control points. In addition to exoplanet detection, such an ExAO system will be capable of characterizing dust disks around stars and will allow high Strehl ratio i ...
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Assessment of optical systems by means of point
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... It was mentioned above that the assessment of the quality of a highly specified optical system has to be done in the wavefront domain down to a fraction of the wavelength of the light. Interferometric methods are mostly used for this purpose. Although the achievable precision is very high, these met ...
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... mirror near its edge, in comparison with those that strike nearer the center. For small telescopes using spherical mirrors with shorter focal ratios, light from a distant point source (such as a star) is not all focused at the same point. Particularly, light striking the inner part of the mirror foc ...
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Optical telescope



An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct view, or to make a photograph, or to collect data through electronic image sensors.There are three primary types of optical telescope: refractors, which use lenses (dioptrics) reflectors, which use mirrors (catoptrics) catadioptric telescopes, which combine lenses and mirrorsA telescope's light gathering power and ability to resolve small detail is directly related to the diameter (or aperture) of its objective (the primary lens or mirror that collects and focuses the light). The larger the objective, the more light the telescope collects and the finer detail it resolves.People use telescopes and binoculars for activities such as observational astronomy, ornithology, pilotage and reconnaissance, and watching sports or performance arts.
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