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The principle, the system concept and the choice of lamp,spectrum,filter of the night sky radiation simulator for the performance evaluation of lowlevellight night vision systems is introduced.

　介绍用于微光夜视仪性能评价的夜天光模拟器的原理和系统概念以及对光源、光谱、滤光片等的选择。

Research on sky subtraction for LAMOST;

LAMOST减天光方案研究

The way to measure the sky brightness with this device is also described.

首先详细介绍了云台便携式光电光度计的结构和设计思想,然后叙述了如何利用云台便携式光电光度计测定天光背景。