Abstract: Provided in the present invention are a reactive composite light stabilizer and the use thereof, and a light-stable modified polymer material. The reactive composite light stabilizer comprises a reactive ultraviolet light absorber and a reactive hindered amine light stabilizer, the reactive ultraviolet light absorber being a reactive triazine ultraviolet light absorber. The reactive triazine ultraviolet light absorber and the reactive hindered amine light stabilizer are combined to achieve a higher absorptivity, a better combining effect, a lower volatility and a higher light-degradation resistance stability, and, both being reactive components, they can exist in the form of chemical bonding in a polymer material, thus having a better long-effective property.

Abstract: A lidar system based on visible-near infrared-shortwave infrared light bands comprises a light source sub-system, a light receiving sub-system and a signal collecting and processing sub-system, and adopts a laser light source having a supercontinuum spectrum laser comprising the three bands of visible, near infrared and shortwave infrared light. The lidar system conveniently and effectively achieves hyperspectral measurement of three bands of visible, near-infrared, and shortwave infrared lights without needing to replace the laser light source, increasing the capability of detecting target spectrum information and application range, providing more accurate measurement results and post-processing algorithms, and strengthening the capability of simultaneously detecting visible-near infrared-shortwave infrared ligh bands of a lidar system.