Study on Inspecting to Laser Spot Character of pulse Laser Measuring Range System

摘要

The mainly function of pulse laser range finder and high-frequency pulse laser measuring range system is to measure distance to the static and the high-speed moving targets, which offers the data to fire control system. It is infeasible method to capture the pulse laser spot by CCD device and image-collecting card because of the narrow width of the laser pulse and the slow frame frequency of the image-collecting card. The paper offers a new method to capturing and inspecting the character of laser spot by the catadioptric collimator, a new infrared-detecting transform device, and the CCD collecting system. The experimental result show the inspecting instrument can measure the center, the diameter of laser spot and realizes the capturing of laser spot in real-time to the pulse laser range finder and high-frequency pulse laser measuring range system. In the processing procedure, the paper offers a new optimizing algorithm to calculate the diameter because laser spot could not be a normal circle duo to the influence optical system, image-processing system. Compared with enumeration method, scanning method, and energy density method, the new method has more measuring precision to the diameter of laser spot. At the same time, the paper considers the influencing factor of asymmetry of CCD also, especially in the high-precision data collecting system.