不同扩束倍数条件下水中气泡的光探测效果  

Effect of Laser-detecting Underwater Bubbles with Different Expanding Devices

作　　者：余扬[1] 王江安[1] 彭谨 马治国[1] 石晟玮[1] 梁善勇[1] 

机构地区：[1]海军工程大学,湖北武汉430033 [2]海军驻航天三院军代室,北京100074

出　　处：《光电技术应用》2008年第6期9-12,共4页Electro-Optic Technology Application

摘　　要：基于米氏散射理论,近似计算了扩束装置对水下气泡幕后向光散射功率的影响,并对距离求导,分析其变化规律;接着在不扩束,3倍扩束和8倍扩束的条件下进行实验,从实验结果中可以看到,采用3倍扩束装置时探测器的接收功率最大,而且对气泡幕距离变化非常敏感,能够增强水下气泡光探测效果.Based on the principle of Mie scattering theory, the different backward scattering powers of bubblefilm in water with different laser expanding devices, the grads are approximately computed, and the rule of the powers is analyzed. Then three kinds of underwater experiment are done with no expanding device, 3-time expanding device and 8-time expanding device. The experiment results indicate that the backward scattering power of bubble-film in water with the 3-time expanding device is more than the other two and its distance sensitivity is very evident, accordingly the effect of laser-detecting underwater bubbles can be improved by applying the 3- time expanding device.

关 键 词：扩束 气泡 激光探测 后向散射 

分 类 号：TN247[电子电信—物理电子学]