Highly visible stationary laser diffraction patterns from liquid surface waves at a few tens Hertz were obtained experimentally, and the disappearance of zero order diffraction spot was also observed.
对于频率为几十赫兹的液体表面波，实验上观察到稳定、清晰、反衬度非常高的衍射图样，并发现了零级缺级现象。
The quality of the reconstructed image directly calculated from the recorded hologram is unsatisfactory because of the presence of the zero-order diffraction and the speckle noise.
由于对该全息图直接计算得到的重构像，受零级衍射光斑和散斑噪声的影响较大，使得重构像质量难以令人满意。
Zero-order diffraction light spot can influence the detection of the correlation peak in joint transform correlator.
联合变换相关器的零级衍射光斑会影响相关峰探测。
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