白光频域光学相干层析检测方法  

Detection method of white-light spectral-domain optical coherence tomography

作　　者：秦玉伟[1,2] 赵宏[1] 

机构地区：[1]西安交通大学机械制造系统工程国家重点实验室,西安710049 [2]渭南师范学院物理与电气工程学院,陕西渭南714000

出　　处：《强激光与粒子束》2013年第8期1921-1924,共4页High Power Laser and Particle Beams

基　　金：长江学者和创新团队发展计划项目(IRT1033);陕西省教育厅科学研究计划项目(12JK0672,12JK0514)

摘　　要：针对频域光学相干层析系统成像过程中产生的图像噪声,提出了一种干涉光谱解耦的方法。该方法通过消除干涉光谱中的直流项和自相关项,实现对图像去噪。利用白光作为光源,对聚苯乙烯单层薄膜进行成像实验,得到薄膜的一维深度图像以及二维层析图像。由二维层析图像可以清晰的获取薄膜的内部微观结构及表面形貌信息。实验结果表明,该检测方法可有效消除薄膜的图像噪声,提高图像信噪比和对比度。Concerning the noise of spectral-domain optical coherence tomography, a method of interference spectrum decou pling was proposed. The method achieves image denoising by eliminating DC and auto-correlation noise of interference spectrum. The white-light source was used for the imaging experiment of the polystyrene single-layer film. The one-dimensional depth image and the two-dimension cross-sectional image of a single-layer film were obtained. The inner micro-structure and the surface topog raphy of the film can be clearly seen from the image. It was experimentally demonstrated that this method can eliminate the image noise effectively, and improve the signal-to-noise ratio and contrast of the image.

关 键 词：光学相干层析成像 噪声 自相关 信噪比 

分 类 号：TH744.3[机械工程—光学工程] O439[机械工程—仪器科学与技术]