| 纯位相场的纹影像及其数值计算方法 |
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| 引用本文： | 吴继宗,林玉驹,周革.纯位相场的纹影像及其数值计算方法[J].天津大学学报(自然科学与工程技术版),1986(4). |
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| 作者姓名： | 吴继宗 林玉驹 周革 |
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| 作者单位： | 天津大学精密仪器工程系
(吴继宗，林玉驹)，天津大学精密仪器工程系(周革) |
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| 摘 要： | 通过纹影系统观察位相物场,是用纹影像的强度变化反映物场的位相变化。其纹影像与物场之间的关系比较复杂。本文从光波通过非均匀透明介质时产生位相变化出发借助于付里叶光学理论,对相干光纹影系统应用于纯位相物场观测时的纹影像光强分布做了仔细的推导,并给出了一种求解此公式的离散数字计算方法。其计算结果得到了实验的验证。
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| 关 键 词： | 纹影像 相干光 傅里叶光学 离散希尔伯特变换 纯位相场 非均匀介质 |
DISTRIBUTION OF SCHLIEREN IMAGE OF THE PURE PHASE FIELD AND ITS NUMERICAL CALCULATION METHOD |
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| Wu Jizong Lin Yuju Zhou Ge.DISTRIBUTION OF SCHLIEREN IMAGE OF THE PURE PHASE FIELD AND ITS NUMERICAL CALCULATION METHOD[J].Journal of Tianjin University(Science and Technology),1986(4). |
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| Authors: | Wu Jizong Lin Yuju Zhou Ge |
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| Institution: | Department of Precision Instruments Engineering |
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| Abstract: | This paper describes the derivation of an expression for the light intensity distribution of the schlieren image used for the observation of pure phase field from the effect of phase changes produced by light waves passing through inhomogenous transplrent medium with the use of the theory of Fourier optics. Adiscrete numerical calculation method is given to solve the expression. The results of the calculations have been verified by experiments. |
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| Keywords: | Schlieren image coherent light Fourier optics Discrete Hilbert Transform Pure phase field Non-homogeneous medium |
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