一种用于大天区面积多目标天文望远镜的低分辨率光纤光谱仪的设计方案

Low Resolution Spectrometer Design for the LAMOST Telescope

针对大天区面积多目标天文望远镜的要求,提出了一种低分辨率光谱仪的设计方案。其特点是光栅作为系统的孔径光栏,将双列交错排列的光纤的输出端在子午面排成圆弧形,消除准直系统的彗差,象散和畸变,整个光学系统无渐晕。

A low resolution spectrometer is designed for use at the Cassegrain focus of the LAMOST 4-meter telescope.In this spectrometer,a grating is used as aperture stop of system.310 fibres are arranged two line.At the outputs of end the fibres are arranged in a curved slit in meridian plane.In collimator there is not coma,astigmation and distortion.