| OCT 系统图像形成机理 |
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| 引用本文： | 曾绍群,骆清铭,徐海峰,刘贤德.OCT 系统图像形成机理[J].华中科技大学学报(自然科学版),1997(Z1). |
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| 作者姓名： | 曾绍群 骆清铭 徐海峰 刘贤德 |
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| 作者单位： | Zeng Shaoqun Dept. of Optoelectronic Eng.，HUST，Wuhan 430074，China. Luo Qingming Xu Haifeng Liu Xiande |
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| 摘 要： | 在弱物体近似下分析了ＯＣＴ系统图像形成机理．研究表明，ＯＣＴ系统相当于一复振幅线性平移不变系统，其横向相干传递函数具有低通特性，纵向相干传递函数具有带通特性．因此，系统测量的横向图像反映了样品内部横向结构的低频信息，纵深图像为内部纵深结构的高频信息．
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| 关 键 词： | 光学相干层析 相干传递函数 图像形成 |
The Image Forming Mechanism in an Optic Coherence Tomography System |
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| Zeng Shaoqun Dept. of Optoelectronic Eng.,HUST,Wuhan ,China. Luo Qingming Xu Haifeng Liu Xiande.The Image Forming Mechanism in an Optic Coherence Tomography System[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1997(Z1). |
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| Authors: | Zeng Shaoqun Dept of Optoelectronic Eng HUST Wuhan China Luo Qingming Xu Haifeng Liu Xiande |
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| Institution: | Zeng Shaoqun Dept. of Optoelectronic Eng.,HUST,Wuhan 430074,China. Luo Qingming Xu Haifeng Liu Xiande |
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| Abstract: | The image forming mechanism in an optic coherence tomography (OCT) system is discussed under the condition of weak object approximation. The OCT system behaves just like a linear shift invariance system with complex amplitude. The transverse coherence transfer function (CTF) is characterized by lowpass while the longitudinal CTF, by bandpass. So the transverse image measured represents the low spectra information of the internal transverse structure of a sample and the longitudinal image represents the high spectra information of the internal longitudinal structure. |
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| Keywords: | optic coherence tomography coherent transfer function image formation |
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