基于离焦方式的光电成像设备激光隐身技术

光电成像装备的猫眼效应使其易遭受激光主动侦察装备的探测,在光电装备成像质量变化允许的范围内,采用离焦的方式来减小猫眼目标的回波功率,可实现相应的隐身。在研究离焦对光电成像设备激光回波强度影响的基础上,利用实验的方法对猫眼目标隐身后的成像质量进行验证和评价,并对离焦后的图像进行清晰度增强。结果表明,通过离焦的方式可有效增大猫眼目标回波发散角,降低回波功率,并且离焦量越大,猫眼效应越弱。对离焦光电设备所采集的图像进行分析后发现,离焦量越大,图像高频分量越少,但是适当的离焦量所造成的成像质量下降在可接受范围内,并且通过采取相应的修复措施,光电成像设备的图像质量得到有效改善。

Stealth technology of optical-electro imaging devices based on focal shift

Electro-optical devices can easily be captured by active laser detection weapons according to the Cat-eye effect of optical windows. The focal shift method was proposed to decrease retroreflected wave power for Cat-eye target stealth when the image quality of these devices was under controlled. The principle of focal shift was analyzed and experimental validation was carried out respectively. Furthermore, digital image of focal shift device was evaluated based on gray gradient function, and the blurred images were restored. The results show that the divergent angle of reflected wave is enlarged and retroreflected wave power decreased when the focal shift distance increases. Meanwhile, high-frequency information of images captured by focal shift electro-optical devices decrease accordingly. However, the deteriorative range of image quality is acceptable. After restoration, the visual effects of the images are improved efficiently.