真实大气环境下水平方向激光主动相干阵列成像实验研究

Experimental Research on Laser Active Coherent Array Imaging through Horizontal Transimission in Real Atmosphere

为了研究激光相干阵列在全大气层湍流中的成像能力,在全相位闭合等方法的基础上,利用HV57模型中的大气折射率结构常数来标定大气相干长度,通过当地风速和光路高度等参数计算了实验所在地等效整层大气湍流的水平传输距离,研制了Ф1.5 m等效孔径的激光相干发射阵列,对1.2 km远处物体进行了成像实验,成像分辨率达到了亚角秒级。验证了激光相干阵列成像系统对大气湍流影响的抑制作用和成像能力,可为未来研制实体激光相干阵列成像系统提供理论与技术支撑。

In order to study laser array in the whole atmosphere turbulence coherent imaging ability,on the basis of all phase method such as closure,the atmospheric refractive index structure constant of HV57 model is used to calibrate the atmospheric coherence length,through the local wind speed and light road height to calculate the experimental parameters,such as local equivalent whole layer of the atmospheric turbulence level transmission distance.A laser coherent emission array with a diameter of 1.5 m equivalent aperture is developed,and the imaging experiment of a 1.2 km distant object is carried out.The imaging resolution reaches sub-arcsecond level.It is verified that the laser coherent array imaging system can suppress the influence of atmospheric turbulence and provide theoretical and technical support for the development of solid laser coherent array imaging system in the future.