speckle images are produced by the reflected and scattered light beams from rough surface through free-space to observing plane when laser illuminates the object surface.
激光经过被测表面反射和散射后,通过自由空间传播至观察面上形成散斑图像,其统计分布依赖于被测表面的微观形貌。
firstly, the four speckle images of the same measured zone for the specimen after and before deformation are recorded by means of two ccd cameras at the different space positions.
首先利用两个ccd摄像机在空间两个不同位置拍摄物体表面在变形前后同一个区域之间的散斑图像;
the original data required in these techniques are a series of the short-exposure speckle images recorded with a speckle image detection system attached to the telescope.
文中对比该技术对原始数据的要求:介绍了云南天文台研制的新型斑点象探测系统的结构和性能。