LAMOST Multi-object Spectrographs with Aspherized Gratings | |
Yongtian Zhu; Gerard R. Lemaitre | |
2003-03-07 | |
Source Publication | Instrument Design and Performance for Optical/Infrared Ground-based Telescopes |
Volume | 4841 |
Issue | 4841 |
Pages | Vol.4841 1127-1133 |
Conference Date | 2002-8-22 |
Conference Place | Hawaii USA |
Funding Organization | The International Society for Optical Engineering |
Publisher | SPIE |
Abstract |
LAMOST is a powerful spectra survey telescope with 4 meter aperture and 5 degree FOV. It's focal plate with 175 meter diameter can accommodate 4000 fibers in which feeds 16 multi-object spectrographs.In the last conference of astronomical telescope and instrumentation hold in Munich, Germany in April, 2000,preliminary design for LAMOST multi-object spectrographs based on plane reflective gratings and Schmidt camera with refractive corrector has been reported'. Here, use aspherized reflective grating instead of the plane reflective grating and need for refractive corrector plate is avoided. Compared to previous design using a refractive plate for correcting aberrations from both collimator and camera mirror, use of aspherized grating has the achromaticity advantage as well as less asphericity, and minimizes the number of optical surface. This would improve the efficiency of spectrograph and allows much broader spectral coverage. In this paper, we present the current design of multi-object spectrographs for LAMOST project. |
Keyword | Instrumentation Spectrographs Aspherical Gratings |
Subject Area | 郭守敬望远镜(lamost) ; 天文光谱仪 ; 天文光学设计 |
Document Type | 会议论文 |
Identifier | http://ir.niaot.ac.cn/handle/114a32/363 |
Collection | 会议论文 |
Recommended Citation GB/T 7714 | Yongtian Zhu,Gerard R. Lemaitre. LAMOST Multi-object Spectrographs with Aspherized Gratings[C]:SPIE,2003:Vol.4841 1127-1133. |
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