基于平稳小波变换的时域光学相干层析系统

以平衡检测原理为基础, 利用中心波长为700 nm的宽带低相干白光光源, 在自由空间中搭建了分辨率为0.93 μm的基于平稳小波变换(SWT)的时域光学相干层析(TDOCT)系统, 并将其应用于塑料薄片与透明胶纸多层薄膜结构的无损评价。针对现有算法重构效果不够理想的问题, 通过对OCT成像过程中的图像增强手段的对比, 提出利用SWT分解算法处理多层薄膜结构的光学相干层析二维图像。由薄膜检测的实验结果可知, 从SWT细节系数中可以提取更显著的多层薄膜界面干涉信号, 从而提高多层薄膜界面的增强效果。

Abstract

Based on the balanced detection and stationary wavelet transform (SWT) algorithm, a broadband low coherent white light source with center wavelength of 700 nm was employed to set up a time-domain optical coherence tomography (TDOCT) system in free space. The resolution of the developed OCT system was down to 0.93 μm and it was applied to nondestructive evaluation of plastic sheets and transparent-tape multi-layered thin-film structures.The imaging enhancement methods in the process of OCT images were compared. To resolve the problem of unsatisfactory reconstruction results using current algorithms, the SWT decomposition algorithm was introduced to deal with the OCT images of the multi-layered structures. The experimental results show that this SWT-based method could extract more distinct interface interference signal from the SWT detail coefficients and therefore the interface imaging quality of multi-layered structures could be enhanced.Shi Guohua,Ding Zhihua, Dai Yun, et al. Ophthalmic imaging by optical coherence tomography[J].Chinese Journal Of Lasers, 2008,35(9): 1429-1431.

参考文献

[1] 史国华．丁志华, 戴云, 等．光纤型光学相干层析技术系统的眼科成像[J].中国激光,2008,35(9): 1429-1431.

[2] Zeng Nan, He Yonghong, Ma Hui. Imaging and analyzing subsurface morphologies of jade objects with optical coherence tomography[J]. Optics and Precision Engineering, 2008,16(7): 1335-1342.

[3] 曾楠, 何永红, 马辉.用于玉石结构分析的光学相干层析术[J].光学·精密工程,2008,16(7): 1335-1342.

[4] Wang Zhibin, Shi Guohua, He Yi, et al．Application of optical coherence tomography to distance measurement of optical surface[J].Optics and Precision Engineering, 2012,20(7): 1469-1474．

[5] 王志斌, 史国华, 何益, 等.光学相干层析技术在光学表面间距测量中的应用[J].光学·精密工程,2012,20(7): 1469-1474．

[6] Zhu Xiaonong, Mao YouXin, Liang Yanmei, et al.Noise analyses of optical coherence tomography systems(I)——Theories and calculations[J]. Acta Photonica Sinica, 2007,36(3): 452-456.

[7] 朱晓农, 毛幼馨, 梁艳梅, 等.光学相干层析系统噪音分析(I)——理论与计算[J].光子学报,2007,36(3): 452-456.

[8] Zhang Yudong, Dai Yun,Shi Guo hua, et al．Application of one-dimensional wavelet transformation in time domain optical coherence tomography imaging[J].Chinese Journal of Lasers, 2008,35(7): 1013-1016.

[9] 张雨东, 戴云, 史国华, 等.一维小波变换在时域光学相干层析成像中的应用[J].中国激光,2008,35(7): 1013-1016.

[10] Wu Qiang, Wang Xinsai, He Ming, et al．Infrared image enhancement based on wavelet analysis and histogram[J]. Journal of Applied Optics, 2011,32(3): 464-467.

[11] 吴强, 王新赛, 贺明,等.一种结合小波分析与直方图的红外图像增强方法[J].应用光学,2011,32(3): 464-467.

[12] Cai De, Yan Yingbai, Jin Guofan. Research on optical wavelet packet transform and its filter for iris recognition[J]. Acta Photonica Sinica, 2006,35(7): 1076-1079.

[13] 才德, 严瑛白, 金国藩.光学小波包变换及其滤波器的研究[J].光子学报,2006,35(7): 1076-1079.

[14] Zhan Bichao,Wu Yiquan,Ji shouxin. Infrared image enhancement method based on stationary wavelet transformation and retinex[J]. Acta Optica Sinica, 2010,30(10): 2788-2793.

[15] 占必超, 吴一全, 纪守新.基于平稳小波变换和Retinex的红外图像增强方法[J].光学学报,2010,30(10): 2788-2793.

[16] Kuang Haipeng, Wang Dejiang, Zhang Jingguo, et al．Aerial image wavelet transformation denoising based on medium pre-filtering[J]. Journal of Applied Optics,2010,31(2): 221-224.

[17] 匡海鹏, 王德江, 张景国 , 等. 基于中值预滤波的航空图像小波去噪算法研究[J].应用光学,2010,31(2): 221-224.

[18] Chen Yuping. Research of spectral-domain optical coherence tomography under white light irradiation[J].Laser Technology,2014,38(3): 372-374.

[19] 陈玉平.白光照明谱域光学相干层析成像研究[J].激光技术, 2014,38(3): 372-374.

[20] Fercher A F. Optical coherence tomography-development, principles,applications[J]. Science Direct, 2009.11(02)1-27.

[21] Qin Yuwei. Film thickness measurement based on optical coherence tomography[J].Laser Technology, 2012,36(5): 662-664.

[22] 秦玉伟.基于光学相干层析成像技术的薄膜厚度测量[J].激光技术,2012,36(5): 662-664.

[23] Li Zheng-xin, Zhang Feng-ming, Zhang Xiao-feng, et al．Flight data denoising method based on stationary wavelet transform[J]. Journal of Computer Applications, 2011,31(10): 2790-2810.

[24] 李正欣, 张凤鸣, 张晓丰, 等.基于平稳小波变换的飞行数据去噪方法[J].计算机应用,2011,31(10): 2790-2810.

[25] Zhong Shuncong, Shen Yaochun. Real-time monitoring of structural vibration using spectral-domain optical coherence tomography[J]. Optics and Lasers in Engineering, 2011, 49: 127-131.

[26] Zhong Shuncong, Shen Yaochun,Ho L, et al． Non-destructive quantification of pharmaceutical tablet coatings using terahertz pulsed imaging and optical coherence tomography[J]. Optics and Lasers in Engineering, 2011,49: 361-365.

[27] Li Chen,Zeitler J A, Dong Yue, et al. Non-destructive evaluation of polymer coating structures on pharmaceutical pellets using full-field optical coherence tomography[J]. Journal of Pharmaceutical Sciences,2014,103(1): 161-166.

[28] Liu Xinwen,Wang Huinan,Qian Zhiyu. Denoising process of OCT image based on wavelet transform[J]. Acta Optica Sinica,2006,35(6): 935-939.

[29] 刘新文, 王惠南, 钱志余.小波变换对OCT图像的降噪处理[J].光子学报,2006,35(6): 935-939.

[30] Guo Xin,Wang Xiangzhao,Bu Peng, et al．Effects of scattering on spectral shape and depth resolution in Fourier domain optical coherence tomography[J].Acta Optica Sinica, 2014,34(1): 0117001.

[31] 郭昕, 王向朝, 步鹏, 等.样品散射对频域光学相干层析成像光谱形状和深度分辨率的影响[J].光学学报,2014,34(1): 0117001.

罗曼婷, 游腾飞, 张秋坤, 钟剑锋, 钟舜聪. 基于平稳小波变换的时域光学相干层析系统[J]. 应用光学, 2015, 36(4): 543. Luo Manting, You Tengfei, Zhang Qiukun, Zhong Jianfeng, Zhong Shuncong. Time-domain optical coherence tomography system based on stationary wavelet transform[J]. Journal of Applied Optics, 2015, 36(4): 543.

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