问到了烧瓶
发表于 2025-3-26 21:07:29
The Lick Observatory Hamilton Echelle Spectrometerse with large format CCDs. It was designed primarily for high resolution (R=50,000) wide bandpass spectroscopy of point-like sources down to a limiting magnitude of about V=16.5, over the 0.34 μm to 1.1 μm spectral region. Its design features a relatively large collimated beam size, the use of prism
nascent
发表于 2025-3-27 01:40:20
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Aspiration
发表于 2025-3-27 08:29:46
A Coudé Echelle Spectrograph with a Large Mosaic Grating but with Small Corrector Lensespping orders with a filter or a small grism but is not suitable for the stacking of many orders. It is not a survey instrument. The camera mirror is made paraboloidal to avoid the need for large refractive correctors such as a Schmidt plate or a Maksutov lens. Instead, a small triplet lens is locate
争吵
发表于 2025-3-27 10:14:15
A New High-Resolution CCD Spectrometer for the McDonald Observatory 2.7-Meter Telescopeh that we propose to build for the McDonald Observatory 2.7-m telescope. It will have a luminosity-resolving-power product equal to or exceeding that of any other high-resolving-power spectrograph in the world. The general configuration of this spectrograph will be given, as will the reasoning behin
旁观者
发表于 2025-3-27 16:36:11
HIRES: A High Resolution Echelle Spectrometer for the Keck 10-Meter Telescopee Nasmyth focus. The beam size will be 12″, and the echelle will be a 1x3 mosaic of newly-mastered 46.5 gr/mm 12″ xl6″ R-2.6 echelles, yielding a (resolution × slit width) product of R S = 39000″. Eventually, up to 7 different cross-dispersers will be available, though only a few will be available a
残忍
发表于 2025-3-27 19:54:59
A Comparison of Holographic and Echelle Gratings in Astronomical Spectrometryé spectrograph of the 2.7-m telescope at McDonald Observatory under conditions typical of high-resolution astronomical spectroscopy. Spectra of a current-stabilized quartz-iodine incandescent lamp were obtained with both gratings in the wavelength range 5900–6800 Å using a Reticon array as detector.
游行
发表于 2025-3-27 22:25:45
What’s New in Gratings?ratings during the last decade. Both turn out to be realizations of long-held dreams. One is the accurate solution of Maxwell’s equations for diffraction gratings, so that diffraction efficiency can be theoretically predicted for any groove geometry, wavelength, material and angle of incidence.
地牢
发表于 2025-3-28 05:24:43
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ABOUT
发表于 2025-3-28 08:07:03
An Ultra-High Resolution Spectrograph in a Hurrytions which are normally impossible. To take full advantage of a 4 metre aperture and a 4th magnitude star (later brighter than 3rd), one obvious application was to very high spectral resolution. The Anglo-Australian Observatory had under construction a coude spectrograph, for which two large echell
有权
发表于 2025-3-28 10:51:43
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