Research On Testing Technology Of Pulse Laser Range Finding System Unit Performance

Pulse laser range finding technology is broadly used in the field of military, geodetic survey, etc. because of the high accuracy and the simply operating. During the developing, producing, operating, and maintaining of the pulse laser range finding system, range finding is usually taken as a method checking the performance of laser range finder. But this method is restricted not only by the target, yard, but also by the visibility limit of the atmosphere and the time of the detection. For casting off the restrictions, the multifunctional, non-contact, and non-traumatic testing measurement is searched.Combining the advantages and the disadvantages of the previous methods testing the main technical characteristics of the pulse laser range finding system, a new testing technology which can rounded, fast, effectively, and accurately testing the range finding system is taken out in this paper. The overall designing scheme of a testing system based on this technology is demonstrated. The testing system can also realize the measurement of the divergence angle, the space distribution of the beam, the impulse shape, the repeat frequency of the laser, and the stability, maximum range, and the range accuracy of a single pulse.The test for the maximum range of the range finding system accomplished by taking advantage of the variable optical attenuator and micro optical power meter; the accurate dynamic emulation of the distance are accomplished by emulating the returning wave from the target through the optical distance light transmitted in the testing system., and further more testing the system's accuracy of ranging. Images of laser spot are collected by the IR-CCD, then processed by the computer, and finally generated the testing result of the divergence angle and the space distribution of the beam intensity; the measurement to the waveshape of the radiative pulsed laser, the repeat frequency of the laser burst, and the stability of every single pulse are accomplished by the high-speed photodetector.The principle and the qualification of the complete testing system are analyzed; the optical system for collimating and converging are designed and evaluated; the main source of the measuring error during measuring the capability of ranging, emitting, and the accepting are analyzed, and finally the range of the measuring error in each part of the testing system is figured out.