非相干强光干扰可见光成像研究

Research on visible light imaging system underincoherent strong light interference

摘要:

激光是干扰可见光侦察与告警、跟踪与制导系统的常用技术手段，但存在着频段短、波束窄、瞄准难等问题。非相干强光干扰技术能有效弥补激光干扰技术的不足，针对非相干强光干扰可见光成像系统的理论分析与实验测试问题，分析了非相干强光干扰可见光成像系统的技术机理，研究了基于图像结构相似性的干扰效果分析模型，构建了检测干扰过程并获取测试数据的实验平台，实验测试并定量分析了光源照度、入射方向、等效距离、背景照度和视场大小等参数条件的变化对可见光成像质量、干扰实施前后图像的相似程度、非相干强光干扰效果的影响。结果表明：当入射到探测器表面的非相干强光定向光束照度值满足一定条件后，实施干扰前后的图像结构相似性参数平均结构相似度值减小，干扰后的图像质量下降、失真严重，模糊了图像中的有效信息，呈现出难以识别目标与背景的干扰效果。该研究成果可为非相干强光定向光束干扰可见光侦察系统和电视制导武器提供技术支撑和方法参考。

Abstract:

Laser has been a commonly used technical means to interfere with visible light reconnaissance and alarm, tracking, and guidance systems, but it has problems such as short frequency band, narrow beam, and difficult aiming. Incoherent strong light interference technology can effectively make up for the shortcomings of laser interference technology. This paper focused on the theoretical analysis and experimental testing issues of strong incoherent light interference on visible light imaging systems, analyzed the technical mechanism of incoherent strong light interference on visible light imaging systems, studied the interference effect evaluation theory model based on image structure similarity, constructed an experimental platform for detecting interference and obtaining test data, and experimentally tested and quantitatively evaluated the influence of changes in parameters such as light source illuminance, incident direction, equivalent distance, background brightness, and field of view size on visible light imaging quality, the similarity degree of images before and after interference implementation, and the effect of incoherent strong light interference. The results show that when the illuminance value of the incoherent strong light directional beam incident on the detector surface meets certain conditions, the mean structural similarity value of the image structure similarity before and after the implementation of the interference decreases, the image quality after the interference decreases, and severe distortion occurs, blurring the effective information in the image, presenting an interference effect that is difficult to distinguish between targets and backgrounds. The research results can provide technical support and method reference for incoherent strong light directional beam interference visible light reconnaissance systems and television-guided weapons.