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随着高光谱相机在工业、农业、科研、国防等众多领域的广泛应用,发展有效的对抗技术也迫在眉睫,激光有源压制干扰是当前对抗高光谱相机的一个有效手段。以双高斯光学系统为例,首先依据高斯光束q参数的传输理论,逐个分析了激光束在高光谱相机光学系统各透镜中的传输,获得了其探测器光敏面上的激光能量分布;然后研究了激光发射参数对探测器光敏面上能量分布的影响,结果表明:探测器光敏面上激光主光斑的大小随激光器对高光谱相机作用距离的增加而减小,随激光束腰尺寸的增大却是先减小后增大,整个变化过程中存在一个最小值,为实现较好的激光干扰效果,激光束腰的设计要尽量避开这个最小值。研究结果可为开展激光有效干扰高光谱成像系统试验以及激光器参数的优化设计提供理论依据和技术支持。
With the wide application of hyperspectral camera in many fields, such as industry, agriculture, scientific research and national defense, it is urgent to develop effective countermeasure technology. Laser active suppression jamming is an effective means to combat hyperspectral camera. Taking the double Gaussian optical system as an example, the transmission of the laser beam in each lens of the optical system of the hyperspectral camera is analyzed one by one according to the transmission theory of the q-parameter of the Gaussian beam, and the laser energy distribution on the photosensitive surface of the detector is obtained. Then, The influence of the laser emission parameters on the energy distribution of the photosensitive surface of the detector is studied. The results show that the size of the main laser spot on the photosensitive surface of the detector decreases with the increase of the laser distance from the hyperspectral camera. With the increase of laser beam waist size, But it is the first to decrease and then increase, there is a minimum value in the whole change process, in order to achieve a better laser interference effect, the design of the laser beam waist should try to avoid this minimum. The results of this study can provide theoretical basis and technical support for the experiment of laser effective interference hyperspectral imaging system and the optimal design of laser parameters.