基于CMOS探测模拟气泡幕前向光散射动态特性  

Dynamic Characteristics of Forward Light Scattering by Simulated Bubble Film based on CMOS

作　　者：张建生[1] 孙建鹏[1] 陈焱[1] 李旭东[1] 刘华成[1] 

机构地区：[1]西安工业大学理学院,西安710021

出　　处：《光子学报》2014年第1期20-24,共5页Acta Photonica Sinica

基　　金：武器装备预研基金(No.51448030101ZK1801);陕西省教育厅专项科研计划项目(No.2010JK585)资助

摘　　要：提出了基于CMOS图像传感器探测前向激光近轴的散射横面角和散射纵面角的概念.使用CMOS采集了模拟气泡幕前向散射光动态图像序列,通过计算每帧灰度图像行和列像元均值将其可以用一个列向量和行向量表示,从而图像序列可以用一个图像序列矩阵描述.实验模拟了压强0.005MPa和0.01 MPa产生的气泡幕,通过计算两种压强产生的气泡幕前向光散射图像序列的横向灰度均值和纵向灰度均值,定性分析了100帧图像序列的灰度分布和演化特点,并定量分析了5帧连续图像的动态变化范围和相关性.分析CMOS探测气泡幕前向散射光动态图像序列实验结果表明,随着压强增大,产生气泡幕尺度增大、密度增加、上升速度加快,导致图像序列横向和纵向散射光灰度变化范围增加,并且相邻图像帧之间变化波动幅度增大.The concepst of Vertical-plane and Horizontal plane scattering angle of forward laser paraxial were proposed based on CMOS. The dynamic image sequence of light scattering by sinmlated bubble film, which was captured by CMOS, can be expressed by an image sequence matrix whose line vector and column vector represented one frame image through computing gray average of column pixel and line pixel of the frame image. The gray distribution and evolution characteristics of 100 frame image sequence of forward light scattering by bubble film generated under presser 0. 005 and 0.01 MPa, was analyzed qualitatively through calculating the mean horizontal and vertical gray, as the dynamic range and correlation of 5 frame image was analyzed quantitatively. Through analyzed the dynamic image scattered by bubble film with the increasing pressure on CMOS, the range and amplitude of horizontal and vertical gray of forward light scattering image sequence increased as the increasing scale, number density and rising speed of bubble film.

关 键 词：尾流 气泡幕 前向光散射 CMOS 像元 

分 类 号：O439[机械工程—光学工程]