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LAMOST Multi-object Spectrographs with Aspherized Gratings
Yongtian Zhu; Gerard R. Lemaitre
Source PublicationInstrument Design and Performance for Optical/Infrared Ground-based Telescopes
PagesVol.4841 1127-1133
Conference Date2002-8-22
Conference PlaceHawaii USA
Funding OrganizationThe International Society for Optical Engineering
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.
KeywordInstrumentation 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
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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