A low resolution spectrometer is designed for use at the Cassegrain focus of the LAMOST 4-meter 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。
According to the observation data obtained during 1980-1985, the author concluded an empirical relationship between the temperature and the changes of the Cassegrain focus of the 1 meter telescope.
根据1980—1985年的观测资料，本文统计了一米望远镜卡焦照相测光时焦距随温度变化的规律。
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