| 光学相干层析系统相干传递函数研究 |
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| 引用本文： | 曾绍群 骆清铭. 光学相干层析系统相干传递函数研究[J]. 光学学报, 1996, 16(3): 40-344 |
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| 作者姓名： | 曾绍群 骆清铭 |
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| 作者单位： | 华中理工大学光电子系 |
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| 摘 要： | 在弱物体近似下从成像系统角度对光学相干层析测量技术进行了理论研究。分析了该技术测量样品纵深结构时图像的形成机理。结果表明它相当于一复振幅线性平移不变系统，从而可用相干传递函数描述系统性能，所得相干传递函数表明系统具有低通特性，半峰值带宽△ｋ＝２△λ／λ＾２。由于物体频谱整体平移了１／λ，测量的是纵向结构的高频信息。本文的工作为定量分析光学相干层析对未知结构的测量结果及进一步提高空间分辨率提供了理论
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| 关 键 词： | 光学相干层析 相干传递函数 |
| 收稿时间： | 1995-01-08 |
On the Coherence Transfer Function of the Optical Coherence Tomography System |
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| Zeng Shaoqun Luo Qingming Liu Xiande Pan Yingtian Li Zaiguang. On the Coherence Transfer Function of the Optical Coherence Tomography System[J]. Acta Optica Sinica, 1996, 16(3): 40-344 |
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| Authors: | Zeng Shaoqun Luo Qingming Liu Xiande Pan Yingtian Li Zaiguang |
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| Abstract: | Optical coherence tomography (OCT) has been analyzed theoretically as an imaging system upon the weak object approximation. It has been proved that the OCT system behaves as a linear shift invariance system and can be described precisely by a coherent transfer function (CTF). The derived longitude CTF has shown that the system performs like a low pass filter with a FWHM Δ k=2 Δ λ/λ 2 . High spatial frequency structure is detected because the spectrum of the object shifted a distance of 1/λ . This research will provide a theoretical basis to quantitatively analyzed the measuring results of the unknown structure and to increase further the spatial resolution. |
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| Keywords: | optical coherence tomography coherent transfer function system analysis optical detection. |
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