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水下光电成像探测是声纳技术的一种有效补充,然而水下激光成像的后向散射效应严重影响了水下光电成像探测的分辨能力与探测距离。基于激光水下传输的布里渊散射理论,分析了蓝绿激光及其布里渊散射水下传输特性,研究了基于光子晶体滤波器的布里渊散射频移检出技术,设计了同步扫描布里渊散射水下成像装置以及距离选通布里渊散射水下成像装置,以布里渊散射频移的空间分布替代场景反射光强度的空间分布进行水下成像探测,高效抑制水下激光成像后向散射噪声,提高成像探测的作用距离。布里渊散射水下激光成像探测机理的探索将为水下目标光电成像探测技术的发展开辟新的途径。
Underwater photoelectric imaging detection is an effective supplement to sonar technology. However, the backscattering effect of underwater laser imaging seriously affects the resolution and detection distance of underwater photoelectric imaging detection. Based on the Brillouin scattering theory of laser underwater transmission, the underwater transmission characteristics of blue-green laser and its Brillouin scattering are analyzed. The detection technique of Brillouin scattering frequency shift based on photonic crystal filter is studied, and the synchronous scanning Brillouin scattering underwater imaging device and distance gated Brillouin scattering underwater imaging device, the spatial distribution of Brillouin scattering frequency shift instead of the spatial distribution of reflected light intensity of the scene for underwater imaging detection, high suppression of underwater laser Scatter noise backscatter imaging, to improve the role of imaging exploration distance. Exploration of underwater Brillouin scattering underwater laser imaging detection mechanism will open up new avenues for the development of underwater target photoelectric imaging detection technology.