It is proved that combining converter holographic grating with lens can produce variable angle between reference light and object light and variable size of holographic facula.
提出了用变频全息光栅实现参物光束夹角可调的方法，从理论上分析了它的结构特征，设计了制作变频全息光栅的三种实验装置，证明了变频全息光栅与透镜结合能产生可变夹角的参物光和大小可变全息光
At the first,the principle of speckle holography is intruduced briefly,then some influences upon power spectrum arised from the noise in real data is analysed and a method to correct the noise bias is discussed.
简要地介绍了斑点全息术的原理 ,分析了存在于实际数据中的各种噪声对功率谱造成的严重影响 ,讨论了消除噪声偏差的方法 ,最后报导了用斑点全息术对两双星的高分辨率象复原结果。