A research group led by Prof. Wang Jian from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) proposed a continuous-scanning near-infrared sky brightness monitor (CNISBM). It can measure 2.5 to 5 μm infrared sky brightness based on an InSb detector and a linear variable filter.
Click here for original story, Researchers design continuous-scanning sky brightness monitor in 2.5- to 5-μm band
Source: Phys.org