Measurement of material surface reflectivity distribution based on 3D image LADAR

摘要

A new measurement of surface reflection index distribution is introduced. Using walk-off induced by return laser pulse power variation, which usually should be eliminated in LADAR system, relative reflection index distribution of material surface could be deduced from the 3D point-cloud data. Detection of actual pulse waveform is the first step, and then the mapping of time walk-off and amplitude is obtained. According to this relationship, amplitude distribution could be deduced from the angle/angle/time data of LADAR. After detaching the influence of detect direction based on the ladar detection range function, the reflection index distribution is acquired finally. The experimental result of this method is shown in the last of paper.