Zhao Guangyu, Malmqvist Elin, Török Sandra, Bengtsson Per-Erik, Svanberg Sune, Bood Joakim, Brydegaard Mikkel
Appl Opt. 2018 Dec 10;57(35):10164-10171. doi: 10.1364/AO.57.010164.
A dual-band continuous-wave (CW) light detection and ranging (lidar) system has been developed for particle classification. In this lidar system, the range-resolved atmospheric backscattering signal is recorded by an optical imaging system satisfying the Scheimpflug principle instead of the conventional time-of-flight approach. It is thus possible to employ low-cost and compact CW diode lasers, facilitating the development of a robust multiple-wavelength atmospheric lidar system that can attain high accuracy of the retrieved parameters of atmospheric particles. The present work demonstrates a dual-band Scheimpflug lidar system employing two diode lasers at 405 nm (0.5 W) and 808 nm (3.2 W). Exposures are milliseconds apart and interpolated. Measurements of various types of particles and smoke have been performed to verify the feasibility of using the present system for improved particle classification and sizing, for the situation when plumes were dilute and no significant opacity was detected.
已开发出一种用于粒子分类的双波段连续波（CW）光探测与测距（激光雷达）系统。在该激光雷达系统中，距离分辨的大气后向散射信号由满足谢宾弗吕格原理的光学成像系统记录，而非传统的飞行时间方法。因此，可采用低成本且紧凑的连续波二极管激光器，这有助于开发一种强大的多波长大气激光雷达系统，该系统能够实现大气粒子反演参数的高精度测量。目前的工作展示了一种双波段谢宾弗吕格激光雷达系统，该系统采用了波长分别为405纳米（0.5瓦）和808纳米（3.2瓦）的两个二极管激光器。曝光间隔为毫秒级并进行插值处理。已对各种类型的粒子和烟雾进行了测量，以验证在羽流稀薄且未检测到明显不透明度的情况下，使用本系统改进粒子分类和尺寸测量的可行性。
