【摘要】 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。更多还原

【Abstract】 The high resolution imaging result of a laboratory-scale stripmap mode synthetic aperture ladar(SAL)is reported. The high resolution SAL imaging is realized utilizing an equivalent transmitting/receiving aperture of0.5 mm×0.5 mm,and the high resolution images with picturesque high quality are generated at target distance of12.9 m. The azimuth resolution synthetic aperture of the SAL images is over 100 times better than the real aperture diffraction limited resolution. The range compressed images of cooperative target and diffusive target, azimuth focused images and phase gradient autofocus(PGA) processed images are given in detail. Experimental figures display a clear SAL image formation process with the typical focused images of every processing step. Experimental results show that PGA has very robust focusing ability in SAL image processing, multiple iterations can greatly improve the imaging quality.更多还原