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提出了基于互相关的多普勒OCT(correlated Doppler optical coherence tomography, CD-OCT)方法, 能够有效的抑制噪声, 实现低信噪比条件下的流速探测. 对CD-OCT算法进行了详细的推导, 分析了噪声的相关性对该算法结果的影响, 最后基于谱域和时域联合探测方法(joint spectral and time domain optical coherence tomography, STD-OCT)以及CD-OCT算法的对比实验证明了该算法能够进一步实现信噪比的提高, 使测量的结果更为稳定.
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关键词:
- 谱域多普勒相关层析成像 /
- 互相关 /
- 信噪比
A new method based cross-correlation technique (CD-OCT) is proposed to acquire and analyse the information about flow velocity with low signal-to-noise ratio(SNR) in spectral-domain optical coherence tomography(SD-OCT). We theoretically study the procedure of this method, and analyse the correlation between the noises by computer simulation and experiment. The Doppler flow images reconstructed by CD-OCT are compared with those reconstructed by Joint spectral and time-domain optical coherence tomography (STD-OCT). The results demonstrate that CD-OCT can significantly improve the SNR, thus rendering it suitable for the flow measurement in low SNR.[1] Huang D, Swanson E A, Lin C P, Schuman J S, Stinson W G, Chang W, Hee M R, Flotte T, Gregory K, Puliafito C A, Fujimoto J G 1991 Science 254 1178
[2] Liang Y M, Zhou D C, Meng F Y, Wang M W 2007 Acta Phys. Sin. 56 3246 (in Chinese) [梁艳梅, 周大川, 孟凡勇, 王明伟 2007 物理学报 56 3246]
[3] Jia Y Q, Liang Y M, Zhu X N 2007 Acta Phys. Sin. 56 3861 (in Chinese) [贾亚青, 梁艳梅, 朱晓农 2007 物理学报 56 3861]
[4] Yang Y L, Ding Z H, Wang K, Wu L, Wu L 2009 Acta Phys. Sin. 58 1773 (in Chinese) [杨亚良, 丁志华, 王凯, 吴凌, 吴兰 2009 物理学报 58 1773]
[5] Leitgeb R, Hitzenberger C, Fercher A 2003 Opt. Express. 11 889
[6] de Boer J F, Cense B, Park B H 2003 Opt. Lett. 28 2067
[7] Choma M, Sarunic M, Yang C 2003 Opt. Express. 11 2183
[8] Chen Z, Zhao Y, Srinivas S 1999 IEEE J. Sel. Topics Quant. Electron. 5 1134
[9] Saxer C E, de Boer J L, Part B H 2000 Opt. Lett. 25 1355
[10] Xu C, Ye J, Marks D L 2004 Opt. Lett. 29 1647
[11] Leitgeb R A, Schmetterer L, Drexler W, Fercher A F, Zawadzki R J, Bajraszewski T 2003 Opt. Express. 11 3116
[12] White B R, Pierce M C, Nassif N, Cense B, Park B H, Tearney G J, Bouma B E, Chen T C, de Boer J F 2003 Opt. Express. 11 3490
[13] Makita S, Hong Y, Yamanari M, Yatagai T, Yasuno Y 2006 Opt. Express. 14 7821
[14] Anna Szkulmowska, Maciej Szkulmowski, Andrzej Kowalczyk, Maciej Wojtkowski 2008 Opt. Lett. 33 1425
[15] Maciej Szkulmowski, Anna Szkulmowska, Tomasz Bajraszewski, Andrzej Kowalczyk, Maciej Wojtkowski 2008 Opt. Express. 16 6008
[16] Westphal V, Yazdanfar S, Rollins A M, Izatt J A 2002 Opt. Lett. 27 34
[17] Fano R M 1951 Technical Report of Massachusetts Institute of Technology 186
[18] Jerome Wenger, Davy Gerard, Heykel Aouani, Herve Rigneault 2009 Anal. Chem. 81 834
[19] Yukio Kobayashi 1982 IEEE 30 1117
[20] Houghton A W, Reeve C D 1995 IEE proc. Radar. Sonar and Navigation 142 286
[21] Houghton A W, Reeve C D 1995 Sixth International Conference on Radio Receivers and Associated Systems 42
[22] Riccardo Ardoino, Andrea Megna 2009 Proceedings of the 6th European Radar Conference 113
[23] Zhang S Y 1976 Acta Phys. Sin. 25 235 (in Chinese) [张叔英 1976 物理学报 25 235]
[24] Yunrui Gong, Anthony D Stokes David Thorncraft 1996 Meas. Sci. Technol 170
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[1] Huang D, Swanson E A, Lin C P, Schuman J S, Stinson W G, Chang W, Hee M R, Flotte T, Gregory K, Puliafito C A, Fujimoto J G 1991 Science 254 1178
[2] Liang Y M, Zhou D C, Meng F Y, Wang M W 2007 Acta Phys. Sin. 56 3246 (in Chinese) [梁艳梅, 周大川, 孟凡勇, 王明伟 2007 物理学报 56 3246]
[3] Jia Y Q, Liang Y M, Zhu X N 2007 Acta Phys. Sin. 56 3861 (in Chinese) [贾亚青, 梁艳梅, 朱晓农 2007 物理学报 56 3861]
[4] Yang Y L, Ding Z H, Wang K, Wu L, Wu L 2009 Acta Phys. Sin. 58 1773 (in Chinese) [杨亚良, 丁志华, 王凯, 吴凌, 吴兰 2009 物理学报 58 1773]
[5] Leitgeb R, Hitzenberger C, Fercher A 2003 Opt. Express. 11 889
[6] de Boer J F, Cense B, Park B H 2003 Opt. Lett. 28 2067
[7] Choma M, Sarunic M, Yang C 2003 Opt. Express. 11 2183
[8] Chen Z, Zhao Y, Srinivas S 1999 IEEE J. Sel. Topics Quant. Electron. 5 1134
[9] Saxer C E, de Boer J L, Part B H 2000 Opt. Lett. 25 1355
[10] Xu C, Ye J, Marks D L 2004 Opt. Lett. 29 1647
[11] Leitgeb R A, Schmetterer L, Drexler W, Fercher A F, Zawadzki R J, Bajraszewski T 2003 Opt. Express. 11 3116
[12] White B R, Pierce M C, Nassif N, Cense B, Park B H, Tearney G J, Bouma B E, Chen T C, de Boer J F 2003 Opt. Express. 11 3490
[13] Makita S, Hong Y, Yamanari M, Yatagai T, Yasuno Y 2006 Opt. Express. 14 7821
[14] Anna Szkulmowska, Maciej Szkulmowski, Andrzej Kowalczyk, Maciej Wojtkowski 2008 Opt. Lett. 33 1425
[15] Maciej Szkulmowski, Anna Szkulmowska, Tomasz Bajraszewski, Andrzej Kowalczyk, Maciej Wojtkowski 2008 Opt. Express. 16 6008
[16] Westphal V, Yazdanfar S, Rollins A M, Izatt J A 2002 Opt. Lett. 27 34
[17] Fano R M 1951 Technical Report of Massachusetts Institute of Technology 186
[18] Jerome Wenger, Davy Gerard, Heykel Aouani, Herve Rigneault 2009 Anal. Chem. 81 834
[19] Yukio Kobayashi 1982 IEEE 30 1117
[20] Houghton A W, Reeve C D 1995 IEE proc. Radar. Sonar and Navigation 142 286
[21] Houghton A W, Reeve C D 1995 Sixth International Conference on Radio Receivers and Associated Systems 42
[22] Riccardo Ardoino, Andrea Megna 2009 Proceedings of the 6th European Radar Conference 113
[23] Zhang S Y 1976 Acta Phys. Sin. 25 235 (in Chinese) [张叔英 1976 物理学报 25 235]
[24] Yunrui Gong, Anthony D Stokes David Thorncraft 1996 Meas. Sci. Technol 170
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