8 October 2015 Three-dimension scanning micro pulse lidar for detecting haze space distribution
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Proceedings Volume 9678, AOPC 2015: Telescope and Space Optical Instrumentation; 967810 (2015) https://doi.org/10.1117/12.2200945
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China
Abstract
Aim to the current situation that the haze distribution detection is limited by network of point-type instruments, a three dimension scanning micro pulse lidar is researched on the basis of the Mie scattering theory of atmospheric particles. In order to strengthen detective ability of fine particles having a significant effect on human respiratory system, we choose a diode-pumped Nd:YAG solid laser with 532-nm wavelength and wind cooled technique as excited optical source to actualize lidar miniaturization. The pulse energy of 50 μJ and pulse repetitive frequency of 1 kHz are configured to ensure the eye-safety and high temporal-spatial resolution, while the lidar operates in the horizontal scanning mode. A Cassegrain telescope with clear aperture of 254 mm is utilized to collect the backscattering signal for portable multi-location observation. The lidar echo signal is filtered through an interference filter with passed bandwidth of 0.2 nm to implement all-time efficient detection. The experimental observation of atmospheric particle distribution is carried out in horizontal scanning mode. Each plane- position-indication of atmospheric particle distribution contains approximately 300 profiles in the horizontal plane within 6-min interval. Experimental results show that this lidar prototype can probe the space distribution of atmospheric particle with the range of 6 km, and that the influence of industrial production on the atmospheric particle density is 2-3 times as much as that of human activity.
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Shichun Li, Qing Yan, Pengpeng Wei, Wenhui Xin, Dengxin Hua, "Three-dimension scanning micro pulse lidar for detecting haze space distribution", Proc. SPIE 9678, AOPC 2015: Telescope and Space Optical Instrumentation, 967810 (8 October 2015); doi: 10.1117/12.2200945; https://doi.org/10.1117/12.2200945
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