线照明并行谱域光学相干层析成像系统与缺陷检测应用研究  

Line-field parallel spectral domain optical coherence tomography and its application in defect inspection

作　　者：赵晨[1] 陈志彦[1] 丁志华[1] 李鹏[1] 沈毅[1] 倪秧[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室,光电信息工程学系,杭州310027

出　　处：《物理学报》2014年第19期94-100,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61335003;61275196;61327007);中央高校基本科研业务费专项资金(批准号:2014QNA5017)资助的课题~~

摘　　要：针对玻璃缺陷在线无损检测的迫切需求,本文报道了一种基于线照明并行谱域光学相干层析成像系统的大视场检测系统.该系统采用快速面阵CMOS相机,单次拍摄即可获取完整的横截面(B-scan)图像.基于线照明面阵探测器的并行谱域光学相干层析成像系统,可以同时获取沿线照明方向各位置处的深度分辨信息,避免了横向扫描机构的应用.研制系统的轴向分辨率为17.9μm,并行方向上的横向分辨率55.7μm,扫描方向上的横向分辨率为24.8μm,轴向扫描速率为128 000 A-scan/s,横向视场为32 mm,空气中成像深度大于6 mm,成像灵敏度达到62 dB以上.利用研制的线照明并行谱域光学相干层析成像系统,开展了不同类型玻璃表面及其内部缺陷的检测应用研究.For the needs of online nondestructive testing method in glass industry, we have presented a large-range line-field parallel spectral domain optical coherence tomography system. Based on fast area scan CMOS camera, the whole crosssectional image can be acquired by a single shot. Depth-resolved image at different lateral positions can be acquired simultaneously, without the lateral scanning mechanism. The axial resolution is 17.9 μm, the lateral resolutions in parallel direction and scanning direction are 55.7 μm and 24.8 μm, respectively. The system measurement range is 32 mm in lateral direction and 6 mm in axial direction. At 1 mm axial position, the system sensitivity can reach 62 dB at a rate of 128 000 A-scan/s. By using the present system, application in glass defect inspection has been investigated.

关 键 词：光学相干层析成像 线照明 并行探测 在线检测 

分 类 号：O439[机械工程—光学工程]