基于偏振片的结构光传感器光学系统建立  

Establishing of optical system for laser-stripe sensor based on polarizer

作　　者：马兆瑞[1] 刘正文[1] 程柏[1] 潘际銮[1] 

机构地区：[1]清华大学机械工程系,北京100084

出　　处：《电焊机》2007年第11期37-39,43,共4页Electric Welding Machine

摘　　要：结构光传感器是焊接自动跟踪研究的重要研究方向。目前对于结构光传感器的研究主要集中于弧光的滤除和图像的处理。实验表明,对于反光强烈的光洁金属表面,杂光的强度与结构光接近,普通的滤光手段难以克服。由于光源激光为偏振光,通过菲涅耳公式计算可知,结构光和杂光也具有偏振性。分析了偏振片在结构光视觉焊缝跟踪传感器中的作用,实验结果显示,通过偏振滤光可以有效消除杂光对于坡口条纹图像的干扰,既可以在光洁表面,又可以在一半光洁一半粗糙的工件表面提取清晰的图像。Structure light sensor is of great importance in automatic welding.The current researches on structure light sensor are mainly about arc light disturbance filtering and image processing.However,in case of highly reflective metal,it＇s very hard to filter stray light from structure light.Since the laser light is polarized ,so according to Fresnel equation, the structure light and stray light are both polarized but with different direction.The effect of polarizer in structure light sensor system is studied, research shows that stray light disturbance can be greatly restricted by polarizer, and can get clear structure light image of highly reflective metal.

关 键 词：焊缝跟踪 传感器 光学系统 偏振 

分 类 号：TG441[金属学及工艺—焊接]