ShaneAO: wide science spectrum adaptive optics system for the Lick Observatory
| Autor: | Renate Kupke, Terry Pfister, Jim Ward, Rosalie McGurk, William Deich, Srikar Srinath, C. M. Rockosi, Jerry Cabak, Chris Ratliff, Kyle Lanclos, Andrew L. Phillips, Andrew P. Norton, John Gates, Michael Saylor, Michael Peck, Donald Gavel, Daren Dillon |
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| Rok vydání: | 2014 |
| Předmět: |
Diffraction
Infrared Computer science FOS: Physical sciences 02 engineering and technology 01 natural sciences 7. Clean energy Deformable mirror Pupil law.invention Telescope Optics Observatory law 0103 physical sciences Spectroscopy Adaptive optics 010303 astronomy & astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) business.industry Dynamic range Wavefront sensor 021001 nanoscience & nanotechnology 0210 nano-technology business Astrophysics - Instrumentation and Methods for Astrophysics |
| DOI: | 10.48550/arxiv.1407.8207 |
| Popis: | A new high-order adaptive optics system is now being commissioned at the Lick Observatory Shane 3-meter telescope in California. This system uses a high return efficiency sodium beacon and a combination of low and high-order deformable mirrors to achieve diffraction-limited imaging over a wide spectrum of infrared science wavelengths covering 0.8 to 2.2 microns. We present the design performance goals and the first on-sky test results. We discuss several innovations that make this system a pathfinder for next generation AO systems. These include a unique woofer-tweeter control that provides full dynamic range correction from tip/tilt to 16 cycles, variable pupil sampling wavefront sensor, new enhanced silver coatings developed at UC Observatories that improve science and LGS throughput, and tight mechanical rigidity that enables a multi-hour diffraction- limited exposure in LGS mode for faint object spectroscopy science. Comment: 11 pages, 10 figures. Presented at SPIE Astronomical Telescopes + Instrumentation conference, paper 9148-76 |
| Databáze: | OpenAIRE |
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