一种半全息圆柱扫描成像新方法

在采用一维线阵进行圆柱扫描成像时,若一维线阵为一发多收或多发多收,并且所有线阵单元同时接收信号,则此时合成的二维柱面阵列为半全息阵列,即沿一维线阵方向为常规阵列或半主动阵列,沿柱面扫描方向为全息阵列,对于这种半全息阵列,现有的常规计算成像方法失效。虚拟透镜成像技术是一种全新的成像技术,可兼容不同的技术体制,并且适用于远、中、近以及超近距离目标的成像。为了解决上述半全息圆柱扫描成像难题,针对半全息阵列的特点,深入研究了虚拟透镜成像技术,提出了一种半全息圆柱扫描快速成像算法,最后进行了成像仿真,仿真结果验证了新算法的有效性。

A New Method of Semi-holographic Cylindrical Scanning Imaging

When one-dimensional linear array is used for planar scanning imaging, if the unit of one-dimensional linear array receives signals at the same time, the synthesized two-dimensional cylindrical array is a semi-holographic array. For this semi-holographic array, existing conventional imaging methods is invalid. Virtual lens imaging is a new imaging technology. It is compatible with different technology systems and can be applied to imaging targets at far, medium, near and ultranear range. In order to solve the imaging problems of semi-holographic cylindrical array, the virtual lens imaging technology is studied based on the characteristics of semi-holographic array. A fast imaging algorithm for semi-holographic cylindrical arrays is proposed. Finally, the imaging simulation results verify the effectiveness of the new algorithm.