摘要
介绍了一种利用CCD器件测量激光测距系统与可见光系统光轴平行性的检测方法。通过精密调整CCD靶面中心与十字分划板中心的共轭关系,使两者同在光轴上,形成同一测量基准。测量时,被检仪器可见光系统视场中心对准十字分划板中心,激光测距机发出的激光束汇聚到CCD靶面上,通过测量激光光斑偏离靶面中心的量计算出光轴的平行性误差。简要介绍了激光光斑重心的算法,通过对光斑图像的预处理,提高重心的计算精度。最终通过实验验证了该方案的准确性,测量精度达到5″。
A measurement method for the parallelism of optic axes between laser range finder and visible optical system by means of CCD was introduced. Through accurate adjustment of the conjugate relation of the centers of CCD target surface and reticule, both was aligned on the same optic axis and form a measurement datum line. During measurement, the field-of-view center of visible optical system of the tested instrument was aligned at the reticule center. The laser beam from a laser range finder was focused on the CCD target surface. By measurement of the deviation of the laser focusing spot from the center of the target surface, the parallel error between the two optic axes could be calculated. The algorithm for computation of the centroid of laser focusing spot was briefly introduced. Computation precision of the centroid was improved by means of pre-processing the acquired spot image. The scheme was verified experimentally. Its measurement accuracy can reach 5＂.
出处
《红外与激光工程》
EI
CSCD
北大核心
2008年第5期890-893,共4页
Infrared and Laser Engineering
