【摘要】 分别叙述了激光干涉技术和雷达差分干涉技术的原理及应用.采用激光实时干涉计量技术实验室观测试样在加压过程中的形变,研究不同破裂孕育区所表现的不同应变异常场特征.采用雷达差分干涉技术可以测量地形及地表形变,并且有西藏玛尼、张北—尚义等地震前后的形变测量结果.指出激光实时干涉计量技术与雷达差分干涉技术相似,都是以条纹变化图研究形变异常场特征.因此,对雷达差分干涉技术测量的孕震过程中的形变场,特别是临近大震发生前的形变场特征进行观测和以激光干涉技术进行实验及对比研究均将很有意义.更多还原

【Abstract】 The principles and applications of laser real-time holographic interferometry (LRTHI) and radar differential interferometry (RDI) techniques are described in this paper, respectively. By using LRTHI, we can observe the deformation of samples under pressure in the lab and study the anomaly characteristics relating to different strain fields in different fracture-developing areas; while by using RDI, we can observe the landform and surface deformation. The results of deformation observed before and after the M_S= 7.9 Mani earthquake (Tibet) and M_S=6.2 Shangyi—Zhangbei earthquake in China are obtained. It is pointed out that LRTHI and RDI are similar, which study the characteristics of anomalous deformation field by fringe variations for both of them. Therefore, the observation of deformation field in the seismogenic process, especially in the period impending an earthquake by RDI, and the comparative study in the lab by LRTHI are of great significance.更多还原