Multiple-slit streak tube imaging lidar

In order to effectively improve the imaging property of multiple-slit streak tube, an experimental platform for Multiple-Slit Streak Tube Laser Imaging Lidar(MS-STIL) was established with a domestically-made optical taper and streak tube. The fiber arrangements of the optical taper were converted from 128×32 at fore-end to 8×512 at back-end, thus changing the planar image to 8 stripes image and enabling the detector to achieve effective detection of field of view. The laser wavelength of this system is 532 nm, with an imaging pixel element of 128×32 and a spatial resolution lower than 0.3 mrad, and all-weather operations can be achieved. On the platform, imaging experiments for out-field building targets were performed, from which the non-scanning image of 1.7 km target and the scanning image of 720 m target were obtained respectively. The imaging results indicated that the proposed MS-STIL can capture the laser images of long-distance targets, as the intensity image can well display the areas where the building target is located, with clear outline; the distance image can effectively divide the areas with different distances, with relatively high distance resolution.