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报道了一个条带模式合成孔径激光雷达(SAL)实验室高分辨率成像结果。以0.5 mm×0.5 mm的等效收发口径,在一个12.9 m距离上,实现了高分辨率SAL成像,获得了照片级的高质量图像。图像的方位合成孔径分辨率超过真实口径衍射极限分辨率的100倍。详细给出了合作目标和漫反射目标的距离压缩像、方位聚焦像和相位梯度自聚焦(PGA)处理像。实验数据展现了清晰的SAL图像形成过程,显示出了各处理步骤的典型聚焦效果。实验结果演示了PGA在SAL图像处理中的稳健聚焦能力,多次迭代能较大幅度地提高成像质量。
A band mode synthetic aperture lidar (SAL) laboratory high resolution imaging report was reported. High-resolution SAL imaging was achieved at a distance of 12.9 m with an equivalent transmit / receive aperture of 0.5 mm × 0.5 mm, resulting in high-quality photo-quality images. The azimuthal synthetic aperture resolution of the image exceeds 100 times the true aperture diffraction limit resolution. The distance compression image, azimuth focusing image and phase gradient self-focusing (PGA) image are given in detail. The experimental data show a clear SAL image formation process, showing the typical focusing effect of each processing step. The experimental results demonstrate the robust focusing ability of PGA in SAL image processing. Multiple iterations can greatly improve the imaging quality.