Infrared Triple Spectrograph (TripleSpec), both also install at the Cassegrain focus. The traditional single-object spectrographs are the optical Double Spectrograph (DBSP) and the At Cassegrain focus, theĬosmic Web Imager (CWI) is an imaging spectrograph (integral-field unit) that images over a range of wavelengths simultaneously. The high-speed CHIMERA imager, also mounting at the prime focus, can even generate video-like data and is used to observe rapidly changing astronomical objects. Mounted at the prime focus of the telescope and covering 24 and 8.9 arcminutes across, respectively. In the optical and the Wide-field Infrared Camera (WIRC) in the infrared, both The Hale's seeing-limited imaging instruments include two wide-field cameras: the Wafer-scale imager for Palomar (WaSP) But Hale instrumentation also emphasizes adaptive optics capabilities that correct for distortions caused by Earth’s atmosphere-known as seeing, what makes stars twinkle-to deliver sharp images comparable to those produced by space telescopes from a ground-based facility. A significant fraction of Hale science activity is focused on spectroscopy-dividing starlight into its constituent colors. Hale Telescope instruments provide a wide range of imaging and spectroscopic capabilities in the optical and near-infrared parts of the electromagnetic spectrum. The Hale Telescope is used every night for astronomical research thanks to a modern and evolving instrument suite. Two additional light paths are also possible-by usingĪdditional mirrors, light can be directed intoįocal length 6,000 inches or 152 meters) or to an instrument in the east arm of the telescope. Through a hole in the primary mirror to what is known as the Cassegrain Prime focus, or a secondary mirror to reflect the light back down A camera or scientific instrument can be placed at Or 16.76 meters), light comes to a focus near the top of the telescope at The primary mirror's area, about 31,000 square inches or 20 square meters, acts as a giant pupil Mirror's thickness varies between 19 ⅝ inches (49.8 cm) at the center and 23 ½ inches (59.7 cm) at Its polished surface, covered with a thin layer of aluminum, The Hale's primary mirror isĪ 200-inch (5.1-meter) in diameter Pyrex disk The Hale Telescope is a reflector, that is, a telescope whose primary opticalĮlement is a curved mirror-there are no lenses in the telescope itself. The labels identify the telescope’s main features. The prime focus (top of the telescope) and at the coudé focus (lower left along the telescope’s White lines indicate the light path for an observer or instruments placed at Meridian cross-sectional drawing of the 200-inch Hale Telescope and dome by Observer information for the Hale TelescopeĬan be found on the corresponding observer page. The information on this page is intended for the public. Instrument required innovative methods and revolutionary technology, which has lead some to consider All aspects of building such a large and precise Hale vigorously pursued funding to build the 200-inch Telescope andĮventually secured the sponsorship of the Rockefeller Foundation in 1928. Of astronomer and Caltech founder George Ellery Hale-the man behind the largest telescopes in the worldĪt the beginning of the 20th century. This extraordinary instrument was the vision Including Solar System studies, the search for extrasolar planets, stellar population and evolutionĪnalysis, and the characterization of remote galaxies. Telescope is a workhorse of modern astronomy and contributes to a wide range of astronomical research Dedicated in 1948 and the largest effective telescope in the world until 1993, the 200-inch Hale
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