期刊
GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IX
卷 12184, 期 -, 页码 -出版社
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.2630611
关键词
Imager; Integral Field Spectrograph; Adaptive Optics; Pupil Viewing Camera; Re-Imaging Optics; Baffling; Infrared; Cryostat
资金
- Heising-Simons Foundation
- Gordon and Betty Moore Foundation
- University of California Observatories
- W. M. Keck Observatory
Liger is an adaptive optics system designed for the W.M. Keck Observatory, comprising an imager and an integral field spectrograph. The design and analysis of the optical assembly for the imager and the re-imaging optics for the spectrograph are presented. The components will be tested in a cryogenic chamber before being installed in the final science cryostat.
Liger is an adaptive optics (AO) fed imager and integral field spectrograph (IFS) designed to take advantage of the Keck All-sky Precision Adaptive-optics (KAPA) upgrade for the W.M. Keck Observatory. We present the design and analysis of the imager optical assembly including the spectrograph Re-Imaging Optics (RIO) which transfers the beam path from the imager focal plane to the IFS slicer module and lenslet array. Each imager component and the first two RIO mechanisms are assembled and individually aligned on the same optical plate. Baffling suppresses background radiation and scattered light, and a pupil viewing camera allows the imager detector to focus on an image of the telescope pupil. The optical plate mounts on an adapter frame for alignment of the overall system. The imager and RIO will be characterized in a cryogenic test chamber before installation in the final science cryostat.
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