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由于Gabor同轴数字全息适用于透过光能量远大于目标遮挡能量,因此,针对小目标的不同横向位置的再现性能研究具有重要的应用价值。进行了不同横向位置的2.52THz Gabor同轴全息成像实验,将Tukey窗函数和角谱法结合实现二维再现,并对再现结果进行对比分析。实验结果表明,提出的算法抑制了孔径效应且整幅图像对比度也有所提高;靠近探测器中心部位的目标较处于探测器边缘附近的目标再现性能略好。
Because Gabor coaxial digital holography is suitable for transmitting light energy much larger than the target occlusion energy, it is of great value to study the reproduction performance of different lateral positions for small targets. A 2.52THz Gabor coaxial holographic imaging experiment with different lateral positions was carried out. The Tukey window function and angular spectrum method were combined to realize two-dimensional reconstruction, and the reconstructed results were compared and analyzed. The experimental results show that the proposed algorithm suppresses the aperture effect and enhances the contrast of the entire image. The target near the detector center is slightly better than the target near the detector edge.